GE Data Sheet
CP2725AC54TE Compact Power Line High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
RoHS
Compliant
Applications
48VDC distributed power architectures
Routers/Switches
VoIP/Soft Switches
LAN/WAN/MAN applications
File servers
Indoor wireless
Telecommunications equipment
Enterprise Networks
SAN/NAS/iSCSI applications
Description
Features
Efficiency 96.2%
Compact 1RU form factor with 30 W/in3 density
Constant power from 52 – 58VDC
2725W from nominal 200 – 277VAC
1200W from nominal 100 – 120VAC
Output voltage programmable from 42V – 58VDC
PMBus compliant dual I2C and RS485 serial busses
Isolated +5V Aux, signals and I2C communications
Power factor correction (meets EN/IEC 61000-3-2 and
EN 60555-2
requirements)
Output overvoltage and overload protection
AC Input overvoltage and undervoltage protection
Over-temperature warning and protection
Redundant, parallel operation with active load sharing
Remote ON/OFF
Internally controlled Variable-speed fan
Hot insertion/removal (hot plug)
Four front panel LED indicators
UL* Recognized to UL60950-1, CAN/ CSA† C22.2 No.
60950-1, and VDE‡ 0805-1 Licensed to
IEC60950-1
CE mark meets 2006/95/EC directive§
RoHS 6 compliant
Conformally coated option
The CP2725AC54TE Rectifier provides significant efficiency improvements in the Compact Power Line platform of Rectifiers. High-
density front-to-back airflow is designed for minimal space utilization and is highly expandable for future growth. The wide-input
standard product is designed to be deployed internationally. It is configured with both RS485 and dual-redundant I2C
communications busses that allow it to be used in a broad range of applications. These signals and the 5V auxiliary supply are
isolated from the main output and frame ground. Feature set flexibility makes this rectifier an excellent choice for applications
requiring modular AC to - 48VDC intermediate voltages, such as in distributed power.
* UL is a registered trademark of Underwriters Laboratories,
Inc.
† CSA is a registered trademark of Canadian Standards
Association.
‡ VDE is a trademark of Verband Deutscher Elektrotechniker
e.V.
§ This product is intended for integration into end-user equipment. All CE marking procedures of end-user equipment should be followed. (The CE mark is placed on selected
products.)
** ISO is a registered trademark of the International Organization of
Standards
+ The PMBus name and logo are registered trademarks of the System Management Interface Forum
(SMIF)
April 19, 2018 ©2018 General Electric Company. All rights reserved.
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
3 Internal protection circuits may override the PFW signal and may trigger an immediate shutdown.
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 2
Absolute Maximum
Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings
only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations
sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.
Parameter
Symbol Min
Max
Unit
Input Voltage: Continuous VIN
0
300
V
AC
Operating Ambient Temperature1
TA
-10
75
°C
Storage Temperature Ts
tg
-40
85
°C
I/O Isolation voltage to Frame (100% factory Hi-Pot tested)
1500
V
AC
Electrical
Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, Vo=54VDC, resistive load, and temperature
conditions.
INPUT
Parameter
Symbol
Min
Typ
Max
Unit
Startup Input Voltage
Low-line Operation
High-line Operation
V
IN
90
185
V
AC
Operating Voltage Range
Low-line Configuration
High-line Configuration
V
IN
90
185
100 – 120
200 - 277
140
300
V
AC
Input Voltage Swell (no damage)
305
Input Frequency F
IN
47
66
H
z
Input Current; at
110
V
AC
at
240
V
AC
I
IN
11.9
13.1
A
AC
Inrush Transient (at 25°C, excluding X-Capacitor charging) I
IN
25
30
A
PK
Idle Power (at 220VAC) 54V OFF
54V ON @ Io=0
P
IN
8.2
16
W
Input Leakage Current (265VAC, 60Hz) I
IN
2.5
3.5
mA
Power Factor (50 – 100% load) PF
0.96
0.995
Efficiency2 (30 – 80% of FL, 240VAC @ 25C)
94.5
96.2
%
Holdup time (output allowed to decay down to
40
V
DC
)
For loads below 1200W T
20
30
ms
Ride thru (tested at 115V @ 230V. (Complies to CISPR24) T
1/2
1
cycle
Power Fail Warning3 (main output allowed to decay to
40
V
DC
)
PF
W
3
5
ms
Isolation (per EN60950) (consult factory for testing to this
requirement)
Input-Chassis/Signals
Input - Output
V 1500
3000
V
AC
V
AC
1 See the derating guidelines under the Environmental Specifications section
2 See efficiency curve in the Characteristics Curves section.
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 3
Electrical Specifications
(continued)
54VDC MAIN OUTPUT
Parameter
Symbol
Min
Typ
Max Unit
Output Power @ low line input 100 –
120V
AC
@ high line input 200 –
277
V
AC
@ nominal 277Vac and Tamb > 45C
W
1200
2725
2000
W
DC
Default Set point
V
OUT
54
V
DC
Overall regulation (load, temperature, aging) 0 - 45C LOAD > 2.5A
> 45C
-1
-2
+1
+2
%
Output Voltage Set Range - analog margining
- Set either by I2C or RS485
44
42
58
58
V
DC
Output Current - @ 1200W (100 – 120Vac),
54
V/
52
V
@ 2725W (200 – 240VAC), 54V/52V
@ 2000W ( > 277VAC @ Tamb > 45C), 54V/52V
I
Out
1
1
1
25/23
50
.
5
/
52
.
4
37/38.4
A
DC
Current Share ( > 50% FL)
-5
5
%
F
L
Proportional Current Share between different rectifiers ( > 50% FL)
<7
%FL
Output Ripple ( 20MHz bandwidth, load > 1A)
RMS (5Hz to 20MHz)
Peak-to-Peak (5Hz to 20MHz)
Psophometric Noise
V
OUT
100
300
4
9
5
mV
rms
mV
p-p
mV
rms
External Bulk Load Capacitance C
OUT
0
5,000 F
Turn-On (monotonic turn-ON from 30 – 100% of Vnom above 5C)
Delay
Rise Time – PMBus mode
Rise Time - RS-485 mode6
Output Overshoot
T
V
OUT
5
100
5
2
s
ms
s
%
Load Step Response ( IO,START > 2.5A )
I
V, VAC
285
AC
V, VAC ≥
285
AC
Response Time
I
OUT
V
OUT
V
OUT
T
2.0
3.2
2
50
%FL
V
DC
V
DC
ms
Overload - Power limit @ high line down to
52
V
DC
Power limit @ low line down to
52V
DC
High line current limit if Vout >
41
.5V
DC
High line current limit if Vout <
41.5V
DC
Low line current limit
Output shutdown (commences as voltage decays below this level)
System power up
P
OUT
P
OUT
I
OUT
V
OUT
2725
1200
53
36
26
39
W
DC
W
DC
A
DC
A
DC
A
DC
V
DC
Upon insertion the power supply will delay an overload shutdown
for 20 seconds allowing for the insertion and startup of multiple
modules within a system.
Overvoltage - 200ms delayed shutdown
Immediate shutdown
Latched shutdown
V
OUT
>
65
<
65
V
DC
Three restart attempts are implemented within a 1 minute window
prior to a latched shutdown.
Over-temperature warning (prior to commencement of shutdown)
Shutdown (below the max device rating being protected)
Restart attempt Hysteresis (below shutdown level)
T
5
20
10
C
Isolation Output-Chassis (Standard, non-POE compliant)
Output-Chassis/Signals (POE compliant per IEEE802.3) V
500
2250
V
DC
V
DC
4 500mVp-p max above 280VAC
input
or above 56Vdc output;
5 Complies with ANSI TI.523-2001 section 4.9.2 emissions max limit of 20mV flat unweighted wideband noise limits
6 Below -5°C, the rise time is approximately 5 minutes to protect the bulk capacitors.
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 4
5VDC Auxiliary output
Parameter
Symbol
Min
Typ
Max Unit
Output Voltage Setpoint V
OUT
5
V
DC
Overall Regulation
-10
7
+5
%
Output Current 0.005
0.75
A
Ripple and Noise (20mHz bandwidth)
50
100
mV
p-p
Over-voltage Clamp
7
V
DC
Over-current Limit
110
175
%FL
Isolation from the main output STD / POE compliant 500 / 2250 Vd
c
Isolation from frame ground
50
Vd
c
General
Specifications
Parameter Min Typ Max Units
Note
s
Reliability
450,000 Hours Full load, 25C ; MTBF per SR232 Reliability protection for
electronic equipment, issue 2, method I, case III,
Service Life
10
Years Full load, excluding fans
Unpacked Weight 2.18/4.8 Kgs/Lbs
Packed Weight 2.45/5.4 Kgs/Lbs
Heat Dissipation 100 Watts or 341 BTUs @ 80% load, 153 Watts or 522 BTUs @ 100% load
Feature
Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Signals are referenced
to Logic_GRD unless noted otherwise. Fault, PFW, OTW, SMBAlert#, and Power capacity need to be pulled HI through external pull-up resistors. See
Feature Descriptions for additional information.
Parameter Symbol Min Typ Max Unit
Enable (should be connected to Logic_GRD) 54V output OFF
54V output ON
V
OUT
V
OUT
1.4
0
5
0.8
V
DC
V
DC
Margining (through adjusting Vcontrol)
Voltage control range
Programmed output voltage range
Voltage adjustment resolution (8-bit A/D)
Output configured to
54V
DC
Output configured to
44V
DC
V
control
V
OUT
V
control
V
control
V
control
44
0
42
3.0
0
3.3
58
3
.
3
58
3.
3
0
.
1
V
DC
V
DC
V
DC
mV
DC
V
DC
V
DC
ON/OFF [short pin controls 54VDC output - ] referenced to VOUT( - )
54V output OFF
54V output ON
V
control
V
control
1.4
0
5
0.8
V
DC
V
DC
Module Present [Resistor connected to Logic_GRD internally]
Write protect enabled
Write protect disabled
V
V
1
0
500
5
0.8
Ω
V
DC
V
DC
Over Temperature Warning (OTW) Logic HI (temperature normal)
Sink current
Logic LO (temperature is too high)
V
I
V
0.7V
DD
0
12
5
0.4
V
DC
mA
V
DC
Fault Logic HI (No fault is present)
Sink current
Logic LO (Fault is present)
V
I
V
0
.
7
V
DD
0
12
5
0.4
V
DC
mA
V
DC
SMBAlert# (Alert#_0, Alert#_1) Logic HI (No Alert - normal)
Sink current
Logic LO (Alert is set)
V
I
V
0
.
7
V
DD
0
12
5
0.4
V
DC
mA
V
DC
7 Within ±5% when load is < 0.5A
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 5
Feature Specifications (continued)
Parameter Symbol Min Typ Max Unit
Power Capacity Logic HI
Logic LO
V
V
0.7V
DD
0
12
0.4
V
DC
V
DC
Reset Logic HI
Logic
LO
V
V
0.7V
DD
0
12
0.4
V
DC
V
DC
Protocol select Logic HI - Analog/PMBus™ mode
Logic – intermediate – RS485 mode
Logic LO – DSP reprogram mode
V
IH
V
II
V
IL
2.7
1.0
0
3.5
2.
65
0.4
V
DC
V
DC
V
DC
Digital Interface
Specifications
Parameter Conditions Symbol Min Typ Max Unit
PMBus Signal Interface Characteristics
Input Logic High Voltage (CLK, DATA) V 1.
5
3.6
V
DC
Input Logic Low Voltage (CLK, DATA) V
0
0.8
V
DC
Input high sourced current (CLK, DATA) I
0
10
μ
A
Output Low sink Voltage (CLK, DATA, SMBALERT#) I
OUT
=3.5mA
V
0
.
4
V
DC
Output Low sink current (CLK, DATA, SMBALERT#) I 3.
5
mA
Output High open drain leakage current (CLK,DATA,
SMBALERT#) V
OUT
=3
.6V I
0
10
μ
A
PMBus Operating frequency range Slave Mode FPMB
10
400
kH
z
Measurement System Characteristics
Clock stretching T
stretch
25
m
s
IOUT measurement range
Direct
I
rng
0
50
8
A
DC
IOUT measurement accuracy 25°C I
out(acc)
-2.5
+2.5
% of FL
VOUT measurement range
Direct
V
out(rng)
0
70
V
DC
VOUT measurement accuracy9 V
out(acc)
-1
+1
%
Temp measurement range Di
rect
Temp
(rng)
0
150
C
Temp measurement accuracy10
Temp
(acc)
-5
+5
%
VIN measurement range
Direct
V
in(rng)
0
320
V
AC
VIN measurement accuracy V
in(acc)
-1.5
+1.5
%
PIN measurement range
Direct
P
in(rng)
0
3000
W
in
PIN measurement accuracy11
P
in(acc)
-3.5
+3.5
%
Fan Speed measurement range
Direct
0
30k
RPM
Fan Speed measurement accuracy
-10
10
%
Fan speed control range Di
rect
0
100
%
Device Addressing
Unit address [reference: VOUT ( - )]
Module 1 V
unitadr
2.
3
2.477
3.3
V
DC
Module 2 V
unitadr
1.
6
1.925
2.2
V
DC
Module 3 V
unitadr
0.
9
1.243
1.5
V
DC
Module 4 V
unitadr
0
0.654
0
.
8
V
DC
Shelf address [reference: VOUT ( - )]
Shelf 1 V
shelfadr
3.
0
3.3
3.45
V
DC
Shelf 2 V
shelfadr
2.
7
2.86
2.97
V
DC
Shelf 3 V
shelfadr
2.
18
2.4
2.56
V
DC
Shelf 4 V
shelfadr
1.
73
1.96
2.14
V
DC
Shelf 5 V
shelfadr
1.
29
1.50
1.70
V
DC
Shelf 6 V
shelfadr
0.
84
1.10
1.25
V
DC
Shelf 7 V
shelfadr
0.
30
0.60
0.80
V
DC
Shelf 8 V
shelfadr
0
0.01
0.25
V
DC
8 Load levels higher than 50A will be read as 50A.
9 Above 2.5A of load current
10 Temperature accuracy reduces non-linearly with decreasing temperature
11 Below 100W input power measurement accuracy reduces significantly
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 6
Environmental
Specifications
Parameter
Min T
y
p Max Units
Notes
Ambient Temperature
-40
12
55
13
°C Air inlet from sea level to 5,000 feet.
Storage Temperature
-40
85
°C
Operating Altitude 1524/5000 m / ft
Non-operating Altitude 8200/30k m / ft
Power Derating with Temperature
2
.
0
%/°C
55°C to
75
C
14
Power Derating with Altitude
2
.
0
C/305 m
C/1000 ft
Above 1524/5000 m/ft; 3962/13000 m/ft
max
Acoustic noise
55
dbA
Full load
Over Temperature Protection 125/110 °C Shutdown / restart [internally measured
points]
Humidity
Operating
Storage
5
5
95
95
%
%
Relative humidity, non-condensing
Shock and Vibration acceleration
6
Grms NEBS GR-63-CORE, Level 3, 20 -2000Hz, min
30 minutes
Earthquake Rating
4
Zone
NEBS GR-63-CORE, all floors, Seismic Zone 4
Designed and tested to meet NEBS
specifications.
EMC
Pa
r
ameter Criteria
Standard
Level
Test
AC input
Conducted emissions EN55022, FCC Docket 20780 part 15, subpart J
EN61000-3-2
Meets Telcordia GR1089-CORE by a 3dB margin
A
0.15 – 30MHz
0 – 2 KHz
Radiated emissions EN55022
A
30 – 10000MHz
AC Input
Immunity
Line sags and
interruptions
EN61000-4-11
B
-30%, 10ms
B
-60%, 100ms
B
-100%, 5sec
Output will stay above 40VDC @ full load
Sag must be higher than 80Vrms.
25% line sag for 2 seconds
1 cycle interruption
Lightning surge EN61000-4-5, Level 4, 1.2/50µs – error free
A
4kV, common mode
A
2kV, differential mode
ANSI C62.41 - damage free
A3
6kV, common & differential
Fast transients EN61000-4-4, Level 3
B
5/50ns, 2kV (common mode)
Enclosure
immunity
Conducted RF fields EN61000-4-6, Level 3
A
130dBµV, 0.15-80MHz, 80% AM
Radiated RF fields EN61000-4-3, Level 3
A
10V/m, 80-1000MHz, 80% AM
ENV 50140
A
ESD EN61000-4-2, Level 3
B
6kV contact, 8kV air
12 Designed to start and work at an ambient as low as -40°C, but may not meet operational limits until above -5°C
13 Output power is derated to 2kW for temperatures higher than 45C and input voltages higher than
285V
AC
.
14 The maximum operational ambient is reduced in Europe in order to meet certain power cord maximum ratings of 70C. The maximum
operational ambient where 70C rated power cords are utilized is reduced to 60C until testing demonstrates that a higher level is acceptable.
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 7
OUTPUT VOLTAGE
VO (V) (20mV/div) OUTPUT VOLTAGE EFFICIENCY, (%)
OUTPUT VOLTAGE
VO (V) (20mV/div) OUTPUT POWER OUTPUT VOLTAGE
Characteristic
Curves
The following figures provide typical characteristics for the CP2725AC54TE rectifier and 25oC.
98 60
96
55
94
92 50
90 Vin=110V Vin=240V
45
88
86 40
84
35
82
80 0 5 10 15 20 25 30 35 40 45 50 55
30 40 45 50 55
OUTPUT CURRENT, IO (A) OUTPUT CURRENT
Figure 1. Rectifier Efficiency versus Output Current. Figure 2. 54VDC output: Power limit, Current limit and
shutdown profile at VIN = 185VAC.
60
55
50
45
40
35
30 15 20 25 30
OUTPUT CURRENT INPUT VOLTAGE
Figure 3. 54VDC output: Power limit, Current limit and
shutdown profile at VIN = 90VAC.
Figure 4. 54VDC output: Output power derating based on
input voltage.
TIME, t (10ms /div) TIME, t (10ms/div)
Figure 5. 54VDC output ripple and noise, full load,
VIN = 185VAC, 20MHz bandwidth
Figure 6. 5VDC output ripple and noise, all full load,
VIN = 185VAC, 20MHz Bandwidth
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 8
OUTPUT VOLTAGE
VO (V) (200mV/div)
OUTPUT
CIURRENT
IO (V)
(20A/div)
OUUTPUT
VOLTAGE
VO (V)
(1V/div)
INPUT VOLTAGE
VIN (V) (100V/div)
OUUTPUT
VOLTAGE
VO(V)
(10V/div)
PFW SIGNAL
VPFW (V) (5V/div)
OUUTPUT VOLTAGE
VO(V) (10V/div)
OUTPUT
CIURRENT
IO (V)
(20A/div)
OUUTPUT
VOLTAGE
VO(V)
(1V/div)
OUTPUT
VOLTAGE
VO (V)
(10V/div)
Characteristic Curves
(continued)
The following figures provide typical characteristics for the CP2725AC54TE rectifier and 25oC.
TIME, t (20ms/div) OUTPUT CURRENT, IO (A)
Figure 7. Transient response 54VDC load step 2.5 – 27.2A,
VIN = 185VAC.
Figure 8. Transient response 54VDC load step 27.2 – 2.5A,
VIN = 185VAC.
TIME, t (50ms/div) TIME, t (2s/div)
Figure 9. 54VDC soft start, no-load & full load, VIN=185VAC -
I2C mode.
Figure 10. 54VDC soft start, full load, VIN = 185VAC -
RS485 mode.
TIME, t (10ms/div) TIME, t (10ms/div)
Figure 11. Ride through missing 1 cycle, full load,
VIN = 230VAC.
Figure 12. PFW alarmed 19.6ms prior to Vo < 40V,
output load: 38A, VIN = 185VAC.
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 9
Shelf_address
1
2
3
4
Maximum voltage 3.45 2.97 2.56 2.14
Nominal voltage 3.30 2.86 2.4 1.96
Minimum voltage 3.00 2.60 2.18 1.73
Address bit- A2 0 1 0 1
Out pu t Set poi nt (Vd c)
Ins ide
mod ule
10k
Rpr og ram
Control and
Status
The Rectifier provides three means for monitor/control: analog,
PMBus™, or the GE Galaxy-based RS485 protocol.
Details of analog control and the PMBus™ based protocol are
provided in this data sheet. GE will provide separate
application notes on the Galaxy RS485 based protocol for
users to interface to the rectifier. Contact your local GE
representative for details.
Signal Reference
Unless otherwise noted, all signals are referenced to
-58
-54
-46
-44
0 0.1 3.3
Vcontrol
3.3Vdc
Logic_GRD. See the Signal Definitions Table at the end of this Vcontrol (Vdc) 3.0
document for further description of all the signals.
Logic_GRD is isolated from the main output of the power
supply for PMBus communications. Communications and the
5V standby output are not connected to main power return
(Vout(-)) and can be tied to the system digital ground point
selected by the user. (Note that RS485 communications is
referenced to Vout(-), main power return of the power supply).
Logic_GRD is capacitively coupled to Frame_GRD inside the
power supply. The maximum voltage differential between
Logic_GRD and Frame_GRD should be less than 100VDC.
Control
Signals
Enable: Controls the main 54VDC output when either analog
control or PMBus protocols are selected, as configured by the
Protocol pin. This pin must be pulled low to turn ON
the rectifier.
The rectifier will turn OFF if either the Enable or the ON/OFF pin
is released. This signal is referenced to Logic_GRD. In RS485
mode this pin is ignored.
ON/OFF: This is a shorter pin utilized for hot-plug
applications
to
ensure that the rectifier turns OFF before the power pins are
disengaged. It also ensures that the rectifier turns ON only
after the power pins have been engaged. Must be connected
to V_OUT ( - ) for the rectifier to be ON.
Margining: The 54VDC output can be adjusted between 44 –
58VDC by a control voltage on the Margin pin. This control
voltage can be generated either from an external voltage
source, or by forming a voltage divider between 3.3V and
Logic_GRD, as shown in Fig. 13. The power supply includes the
high side pull-up 10kΩ resistor to 3.3VDC. Connecting a resistor
between the margin pin and Logic_GRD will complete the
divider.
An open circuit, or a voltage level > 3.0VDC, on this pin sets the
main output to the factory default setting of 54VDC.
Hardware margining is only effective until software
commanded output voltage changes are not executed.
Software commanded output voltage settings permanently
override the hardware margin setting until power to the
internal controller is interrupted, for example if input power or
bias power is recycled.
The controller always restarts into its default configuration,
programmed to set the output as instructed by the margin pin.
Subsequent software commanded settings permanently
override the margin pin. Adding a resistor between margin and
Vout(-) is an ideal way of changing the factory set point of the
rectifier to whatever voltage level is desired by the user.
Figure 13. Diagram showing how output can be margined
using Vcontrol adjustment.
Module Present Signal: This signal has dual functionality. It
can be used to alert the system when a rectifier is inserted. A
500Ω resistor is present in series between this signal and
Logic_GRD. An external pull-up should not raise the voltage on
the pin above 0.25VDC. When the voltage on this pin exceeds
1VDC, the write_protect feature of the EEPROM is enabled.
8V_INT: Single wire connection between modules, Provides
bias to the DSP of an unpowered module.
Reset: This is a PCA9541 multiplexer function utilized during
PMBus communications. If momentarily grounded (Logic_GRD),
the multiplexer would reset itself.
Protocol: Establishes the communications mode of the
rectifier, between analog/PMBus and RS485 modes. For RS485,
connect a 10kΩ pull-down resistor from this pin to V_OUT( - ).
For analog/PMBus leave the pin open. Do not tie this signal pin
to V_OUT( - ) because that connection configures the internal
DSP into a reprogrammed state.
Unit Address: Each module has an internal 10kΩ resistor
pulled up between unit_address and 3.3VDC. A resistor
between unit_address and Vout(-) sets the appropriate unit
address.
I2C address
Rectifier Resistor Value Nominal voltage
A1
A0
1
30K
2.
477
0
0
2
14K
1.
925
0
1
3
6K
1.
243
1
0
4
2.
5K
0.
654
1
1
Shelf Address: By applying the required voltage between the
shelf address pin and Vout(-), up to 8 different shelves and so
up to 32 different modules can be addressed using either the
PMBus or GE Galaxy based RS485 protocol.
PMBus addressing is limited to a maximum of 8 modules and
so the software decodes the shelf address setting into either
shelf 0 or shelf 1 in PMBus applications. If more than two
shelves are paralleled, the user must separate the I2C lines so
that address conflicts do not occur.
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 10
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
Shelf_address
5
6
7
8
Maximum voltage 1.70 1.25 0.80 0.25
Nominal voltage 1.50 1.10 0.60 0.01
Minimum voltage 1.29 0.84 0.30 0
Address bit- A2 0 1 0 1
Status
Signals
Power Capacity: A HI on this pin indicates that the rectifier
delivers high line rated output power; a LO indicates that the
rectifier is connected to low line configured for 1200W
operation.
Power Fail Warning: This signal is HI when the main output is
being delivered and goes LO for the duration listed in this data
sheet prior to the output decaying below the listed voltage
level.
Fault: This signal goes LO for any failure that requires rectifier
replacement. These faults may be due to:
Fan failure
Over-temperature warning
Over-temperature shutdown
Over-voltage shutdown
Internal Rectifier Fault
Digital Feature
Descriptions
PMBus™ compliance: The power supply is fully compliant to
the Power Management Bus (PMBus™) rev1.2 requirements
with the following exceptions:
The power supply continuously updates its STATUS and ALARM
registers to the latest state in order to capture the ‘present’
state of the power supply. There are a number of indicators,
such as those indicating a communications fault (PEC error,
data error) that do not get cleared until specifically instructed
by the host controller sending a clear_faults command. A ‘bit’
indicator notifies the user if the STATUS and ALARM registers
changed since the last ‘read’ by the host controller.
For example, if a voltage surge causes a momentary shutdown
for over voltage the power supply will automatically restart if
the ‘auto_restart’ feature is invoked. During the momentary
shutdown the power supply issues an Alert# indicating to the
system controller that a status change has occurred. If the
system controller reads back the STATUS and ALARM registers
while the power supply is shut down it will get the correct fault
condition. However, inquiry of the state of the power supply
after the restart event would indicate that the power supply is
functioning correctly. The STATUS and ALARM indicators
did not
freeze at the original shutdown state and so the reason for the
original Alert# is erased. The restart ‘bit’ would be set to indicate
that an event has occurred.
The power supply also clears the STATUS and ALARM registers
after a successful read back of the information in these
registers, with the exception of communications error alarms.
This automated process improves communications efficiency
since the host controller does not have to issue another
clear_faults command to clear these registers.
Dual, redundant buses: Two independent I2C lines provide true
communications bus redundancy and allow two independent
controllers to sequentially control the power supply. For
example, a short or an open connection in one of the I2C lines
does not affect communications capability on the other I2C line.
Failure of a ‘master’ controller does not affect the power
supplies and the second ‘master’ can take over control at any
time.
Using the PCA9541 multiplexer: Transition between the two
I2C lines is provided by the industry standard PCA9541 I2C
master selector multiplexer. Option 01 of the device code is
supplied which, upon start-up, connects channel 0 to the
power supply. In this fashion applications using only a single
I2C line can immediately start talking across the bus without
first requiring to reconfigure the multiplexer.
Figure 14. Diagram showing conceptual representation
of the dual I2C bus system.
Control can be taken over at any time by a specific ‘master’
even during data transmission to the other ‘master’. The
‘master’ needs to be able to handle incomplete transmissions
in the multi-master environment in case switching should
commence in the middle of data transmission.
Master/Slave: The ‘host controller’ is always the MASTER.
Power supplies are always SLAVES. SLAVES cannot initiate
communications or toggle the Clock. SLAVES also must
respond expeditiously at the command of the MASTER as
required by the clock pulses generated by the MASTER.
Clock stretching: The power supply may initiate clock
stretching if it is busy. The ‘slave’ may keep the clock LO until it
is ready to receive instructions. The maximum clock stretch
interval is 25ms.
The host needs to refrain from issuing the next clock signal
until the clock is released, or it needs to delay the next clock
pulse beyond the clock stretch interval of the power supply.
Note that clock stretching occurs after the 9th (ACK) bit, the
exception being the START command.
Clock
Stretch
Figure 14. Example waveforms showing clock stretching.
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 11
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
Communications speed: Both 100kHz and 400kHz clock rates
are supported. The power supplies default to the 100kHz clock
rate.
Packet Error Checking: The power supply will not respond to
commands without the trailing PEC. The integrity of
communications is compromised if packet error correction is
not employed. There are many functional features, including
turning OFF the main output, that require validation to ensure
that the correct command is executed.
PEC is a CRC-8 error-checking byte, based on the polynomial
C(x) = x8 + x2 + x + 1, in compliance with PMBus™
requirements. The calculation is based in all message bytes,
including the originating write address and command bytes
preceding read instructions. The PEC is appended to the
message by the device that supplied the last byte.
SMBusAlert#: The power supply can issue SMBAlert# driven
from either its internal micro controller (µC) or from the
PCA9541 I2C bus master selector. That is, the SMBAlert# signal
of the internal µC funnels through the PCA9541
master
selector
that buffers the SMBAlert# signal and splits the signal
to the two SMBAlert# signal pins exiting the power supply. In
addition, the PCA9541 signals its own SMBAlert# request to
either of the two SMBAlert# signals when required.
Non-supported commands: Non supported commands are
flagged by setting the appropriate STATUS bit and issuing an
SMBAlert# to the ‘host’ controller.
Data out-of-range: The power supply validates data settings
and sets the data out-of-range bit and SMBAlert# if the data is
not within acceptable range.
SMBAlert# triggered by the µC: The µC driven SMBAlert#
signal informs the ‘master/host’ controller that either a
STATE
or
ALARM change has occurred. Normally this signal is HI. The
signal will change to its LO level if the power supply has
changed states and the signal will be latched LO until
the
power supply receives a ‘clear’ instruction as outlined below. If
the alarm state is still present after the ‘clear_faults’ command
has been received, then the signal will revert back into its LO
level again and will latch until a subsequent ‘clear’ signal is
received from the host controller.
The signal will be triggered for any state change, including the
following conditions;
VIN under or over voltage
Vout under or over voltage
IOUT over current
Over Temperature warning or fault
Fan Failure
Communication error
PEC error
Invalid command
Internal faults
The power supply will clear the SMBusAlert# signal (release the
signal to its HI state) upon the following events:
Completion of a ‘read_status’ instruction
Receiving a CLEAR_FAULTS command
The main output recycled (turned OFF and then ON) via
the ENABLE signal pin
The main output recycled (turned OFF and then ON) by the
OPERATION command
SMBAlert# triggered by the PCA9541: If clearing the Alert#
signal via the clear_faults or read back fails, then reading back
the Alert# status of the PCA9541 will be necessary followed by
clearing of the PCA9541 Alert#.
The PCA9541 can issue an Alert# even when single bus
operation is selected where the bus master selector has not
been used or addressed. This may occur because the default
state of the PCA9541/01 integrated circuit issues Alert# to both
i2C lines for all possible transitioning states of the device. For
example, a RESET caused by a glitch would cause the Alert# to
be active.
If the PCA9541 is not going to be used in a specific application
(such as when only a single I2C line is utilized), it is imperative
that interrupts from the PCA9541 are de-activated by the host
controller. To de-activate the interrupt registers the PCA9541
the ‘master’ needs to address the PCA9541 in the ‘write’ mode,
the interrupt enable (IE) register needs to be accessed and the
interrupt masks have to be set to HI ‘1’. (Note: do not mask bit
0 which transmits Alert# from the power supply). This
command setting the interrupt enable register of the PCA9541
is shown below;
Start Unit Address ACK
1 7 6 5 4 3 2 1 0
1
S 1 1 1 0 A2 A1 A0 0
A
Command Code ACK IE Register Stop
8
1
8
0
x
00
A
0x0E
P
There are two independent interrupt enable (IE) registers, one
for each controller channel (I2C-0 and I2C-1). The interrupt
register of each channel needs to be configured
independently. That is, channel I2C-0 cannot configure the IE
register of I2C-1 or vise-versa.
This command has to be initiated to the PC9541 only once
after application of power to the device. However, every time a
restart occurs the PCA9541 has to be reconfigured since its
default state is to issue Alert# for changes to its internal status.
If the application did not configure the interrupt enable register
the Alert# line can be cleared (de-activated), if it has been
activated by the PCA9541, by reading back the data from the
interrupt status registers (Istat).
Refer to the PCA9541 data sheet for further information on
how to communicate to the PCA9541 multiplexer.
Please note that the PCA9541 does not support Packet Error
Checking (PEC).
Re-initialization: The I2C code is programmed to re-initialize if
no activity is detected on the bus for 5 seconds. Re-
initialization is designed to guarantee that the I2C µController
does not hang up the bus. Although this rate is longer than the
timing requirements specified in the SMBus specification, it
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 12
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
Command Hex Data
Function
Code Field
Operation
01
1
Output ON/OFF
Clear_Faults
03
0
Clear Status
Vout_command
21
2
Set Vout
Vout_OV_fault_limit
40
2
Set OV fault limit
Read_status
D0
10
Read Status, Vout, Iout, T
LEDs test ON
D2
0
Test LEDs
LEDs test OFF
D3
0
Service_LED_ON
D4
0
Service LED
Service_LED_OFF
D5
0
Enable_write
D6
0
Enable EEPROM write
Disable_write
D7
0
Disable EEPROM write
Inhibit_restart D
8
0
Latch upon failure
Auto_restart D
9
0
Hiccup
Isolation_test D
A
0
Perform isolation test
Read_input_string DC
2
Read Vin and Pin
Read_firmware_rev DD
3
Firmware revisions
Read_run_timer DE
3
Accumulated ON state
Fan_speed_set DF
3
Fan speed control
Fan_normal_speed
E0
0
Stop fan control
Read_fan_speed
E1
4
Fan control & speed
Stretch_LO_25ms
E2
0
Production test feature
FUNCTION DATA BYTE
Unit ON
0
x
80
Unit OFF
0
x
00
had to be extended in order to ensure that a re-initialization
would not occur under normal transmission rates. During the
few µseconds required to accomplish re-initialization the I2C
µController may not recognize a command sent to it. (i.e. a
start condition).
Global broadcast: This is a powerful command because it can
instruct all power supplies to respond simultaneously in one
command. But it does have a serious disadvantage. Only a
single power supply needs to pull down the ninth acknowledge
bit. To be certain that each power supply responded to the
global instruction, a READ instruction should be executed to
each power supply to verify that the command properly
executed. The GLOBAL BROADCAST command should only be
executed for write instructions to slave devices.
Note: The PCA9541 i2c master selector does not respond to the
GLOBAL BROADCAST command.
Read back delay: The power supply issues the SMBAlert #
notification as soon as the first state change occurred. During
an event a number of different states can be transitioned to
before the final event occurs. If a read back is implemented
rapidly by the host a successive SMBAlert# could be triggered
by the transitioning state of the power supply. In order to avoid
successive SMBAlert# s and read back and also to avoid
reading a transitioning state, it is prudent to wait more than 2
seconds after the receipt of an SMBAlert# before executing a
read back. This delay will ensure that only the final state of the
power supply is captured.
Successive read backs: Successive read backs to the power
supply should not be attempted at intervals faster than every
one second. This time interval is sufficient for the internal
processors to update their data base so that successive reads
provide fresh data.
Device ID: Address bits A2, A1, A0 set the specific address of
the power supply. The least significant bit x (LSB) of the address
byte configures write [0] or read [1] events. In a write
command the system instructs the power supply. In a read
command information is being accessed from the power
supply.
8
1
8
1
8
1
1
Low data byte A High data byte A PEC A
P
Master to Slave Slave to Master
SMBUS annotations; S – Start , Wr – Write, Sr – re-Start, Rd – Read,
A – Acknowledge, NA – not-acknowledged, P – Stop
Direct mode data format: The Direct Mode data format is
supported, where y = [ mX + b ] x 10R . In the equation, y is the
data value from the controller and x is the ‘real’ value either
being set or returned. except for VIN and Fan
speed
, x is the
data value from the controller and y is the ‘real’ value.
For example, to set the output voltage to 50.45VDC, Multiply the
desired set point by the m constant, 50.45 x 400 = 20,180.
Convert this binary number to its hex equivalent: 20,180b =
0x4ED4. The result is sent LSB=0xD4 first, then MSB=0x4E.
The constants are
FUNCTION Operation m b R
Output voltage
Output voltage shutdown
Write / read 400
0
0
Output Current
read
5
0
0
Temperature
read
1
0
0
Input Voltage
read
1
75
0
Input Power
read
1
0
0
Fan Speed setting ( % )
read
1
0
0
Fan speed in RPM
read
100
0
0
PMBusTM Command set:
Address
Bit
7 6 5 4 3 2 1 0
PCA9541 1 1 1 0 A2 A1 A0 R/W
Micro controller 1 0 0 0 A2 A1 A0 R/W
External EEPROM 1
0
1 0 A2 A1 A0 R/W
Global Broadcast 0 0 0 0 0 0 0 0
MSB LSB
The Global Broadcast instruction executes a simultaneous
write instruction to all power supplies. A read
instruction cannot
be accessed globally. The three programmable address bits are
the same for all I2C accessible devices within the
power supply.
PMBusTM
Commands
Standard instruction: Up to two bytes of data may follow an
instruction depending on the required data content. Analog
data is always transmitted as LSB followed by MSB. PEC is
mandatory and includes the address and data fields.
Command
Descriptions
Operation (01h) : By default the Power supply is turned ON at
power up as long as ENABLE is active LO. The Operation
command is used to turn the Power Supply ON or OFF via the
PMBus. The data byte below follows the OPERATION command.
1
8
1
8
1
S Slave address Wr A Command Code
A
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 13
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
Bit
Title
Description
7
spare
6
Isolation test OK Isolation test completed successfully.
5
Internal fault The power supply is faulty
4
Shutdown
3
Service LED ON ON = 1
2
External fault the power supply is functioning OK
1
LEDs flashing LEDs tested test ON = 1
0
Output ON ON = 1
To RESET the power supply cycle the power supply OFF, wait at
least 2 seconds, and then turn back ON. All alarms and
shutdowns are cleared during a restart.
Clear_faults (03h): This command clears information bits in
the STATUS registers, these include:
Isolation OK
Isolation test failed
Restarted OK
Invalid command
Invalid data
PEC error
Vout_Command (21h) : This command is used to change the
output voltage of the power supply. Changing the output
voltage should be performed simultaneously to all power
supplies operating in parallel using the Global Address
(Broadcast) feature. If only a single power supply is instructed
to change its output, it may attempt to source all the required
power which can cause either a power limit or shutdown
condition.
Software programming of output voltage overrides the set
point voltage configured during power_up. The program no
longer looks at the ‘margin pin’ and will not respond to any
hardware voltage setting. The default state cannot be
accessed any longer unless power is removed from the DSP.
To properly hot-plug a power supply into a live backplane, the
system generated voltage should get re-configured into either
the factory adjusted firmware level or the voltage level
reconfigured by the margin pin. Otherwise, the voltage
state of
the plugged in power supply could be significantly different
than the powered system.
Voltage margin range: 42VDC – 58
V
DC
.
A voltage programming example: The task: set the output
voltage to 50.45VDC
The constants for voltage programming are: m = 400, b and R
= 0. Multiply the desired set point by the m constant, 50.45 x
400 = 20,180. Convert this binary number to its hex equivalent:
20,180b = 4ED4h. Transmit the data LSB first, followed by MSB,
0 x D44Eh.
Vout_OV_fault_limit (40h) : This command sets the Output
Overvoltage Shutdown level.
Manufacturer-Specific PMBusTM
Commands
Many of the
manufacturer-specific
commands read back more
than two bytes. If more than two bytes of data are returned,
the standard SMBusTM Block read is utilized. In this process, the
Master issues a Write command followed by the data transfer
from the power supply. The first byte of the Block Read data
field sends back in hex format the number of data bytes,
exclusive of the PEC number, that follows. Analog data
is
always
transmitted LSB followed by MSB. A No-ack following
the PEC byte signifies that the transmission is complete and is
being terminated by the ‘host’.
Read_status (D0h) : This ‘manufacturer specific’ command is
the basic read back returning STATUS and ALARM
register
data,
output voltage, output current, and internal temperature
data in a single read.
1
8
1
8
1
S
Slave address Wr
A
Command Code
A
1
8
1
8
1
Sr Slave address Rd
A
Byte count = 9
A
8
1
8
1
8
1
Status-2
A
Status-1
A
Alarm-2
A
8
1
8
1
8
1
Alarm-1
A
Voltage LSB
A
Voltage MSB
A
8
1
8
1
8
1
1
Current
A
Temperature
A
PEC NA
P
Status and alarm registers
The content and partitioning of these registers is significantly
different than the standard register set in the PMBus™
specification. More information is provided by these registers
and they are accessed rapidly, at once, using the ‘multi
parameter’ read back scheme of this document. There are a
total of four registers. All errors, 0 – normal, 1 – alarm.
Status-2
Bit
Title
Description
7
PEC Error Mismatch between computed and
transmitted PEC. The instruction has
not been executed. Clear_Flags
resets this register.
6
Will Restart Restart after a shutdown = 1
5
Invalid Instruction The instruction is not supported. An
ALERT# will be issued. Clear_Flags
resets this register.
4
Power Capacity High line power capacity = 1
3
Isolation test
failed
Information only to system controller
2
Restarted ok Informs HOST that a successful
RESTART occurred clearing the status
and alarm registers
1
Data out of range Flag appears until the data value is
within range. A clear_flags
command does not reset this register
until the data is within normal range.
0
Enable pin HI State of the ENABLE pin, HI = 1 = OFF
Isolation test failed: The ‘system controller’ has to determine
that sufficient capacity exists in the system to take a power
supply ‘off line’ in order to test its isolation capability. Since the
power supply cannot determine whether sufficient redundancy
is available, the results of this test are provided, but the
‘internal fault’ flag is not set.
Status-1
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 14
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
Alarm-2
Bit Title Description
7
Fan Fault
6
No primary No primary detected
5
Primary OT Primary section OT
4
DC/DC OT DC/DC section OT
3
Output voltage
lower than bus
Internal regulation failure
2
Thermal sensor
failed
Internal failure of a temperature
sensing circuit
1
5V out_of_limits Either OVP or OCP occurred
0
Power delivery a power delivery fault occurred
Power Delivery: The power supply compares its internal
sourced current to the current requested by the current share
pin. If the difference is > 10A, a fault is issued.
Alarm-1
Bit Title Description
7
Unit in power limit An overload condition that results in
constant power
6
Primary fault Indicates either primary failure or
INPUT not present. Used in
conjunction with bit-0 and Status_1
bits 2 and 5 to assess the fault.
5
Over temp.
shutdown
One of the over_temperature
sensors tripped the supply
4
Over temp warning Temperature is too high, close to
shutdown
3
In over current Shutdown is triggered by low
output voltage <
39V
DC
.
2
Over voltage
shutdown
1
Vout out_of_limits Indication the output is not within
design limits. This condition may or
may not cause an output shutdown.
0
Vin out_of_limits The input voltage is outside design
limits
LEDS test ON (D2h) : Will turn-ON simultaneously the four
front panel LEDs of the Power supply sequentially 7 seconds
ON and 2 seconds OFF until instructed to turn OFF. The intent
of this function is to provide visual identification of the power
supply being talked to and also to visually verify that the LEDs
operate and driven properly by the micro controller.
LEDS test OFF (D3h) : Will turn-OFF simultaneously the four
front panel LEDs of the Power supply.
Service LED ON (D4h) : Requests the power supply to flash-ON
the Service (ok-to-remove) LED. The flash sequence is
approximately 0.5 seconds ON and 0.5 seconds OFF.
Service LED OFF (D5h) : Requests the power supply to turn OFF
the Service (ok-to-remove) LED.
Enable write (D6h) : This command enables write permissions
into the upper ¼ of memory locations for the external
EEPROM. A write into these locations is normally disabled until
commanded through I2C to permit writing into the protected
area. A delay of about 10ms is required from the time the
instruction is requested to the time that the power supply
actually completes the instruction.
See the FRU-ID section for further information of content
written into the EEPROM at the factory.
Disable write (D7h) : This command disables write permissions
into the upper ¼ of memory locations for the external
EEPROM.
Unit in Power Limit or in Current Limit: When output voltage
is > 36VDC the Output LED will continue blinking.
When output voltage is < 36VDC, if the unit is in the RESTART
mode, it goes into a hiccup. When the unit is ON the output
LED is ON, when the unit is OFF the output LED is OFF.
When the unit is in latched shutdown the output LED is OFF.
Inhibit_restart (D8h) : The Inhibit-restart command directs
the power supply to remain latched off for over_voltage,
over_temperature and over_current. The command needs to
be sent to the power supply only once. The power supply will
remember the INHIBIT instruction as long as internal bias is
active.
Restart after a lachoff: To restart after a latch_off either of
four restart mechanisms are available. The hardware pin
Enable may be turned OFF and then ON. The unit may be
commanded to restart via i2c through the Operation
command by first turning OFF then turning ON . The third way
to restart is to remove and reinsert the unit. The fourth way is
to turn OFF and then turn ON ac power to the unit. The fifth
way is by changing firmware from latch off to restart. Each of
these commands must keep the power supply in the OFF state
for at least 2 seconds, with the exception of changing to
restart.
A successful restart shall clear all alarm registers, set the
restarted successful bit of the Status_2 register.
A power system that is comprised of a number of power
supplies could have difficulty restarting after a shutdown event
because of the non-synchronized behavior of the individual
power supplies. Implementing the latch-off mechanism
permits a synchronized restart that guarantees the
simultaneous restart of the entire system.
A synchronous restart can be implemented by;
1. Issuing a GLOBAL OFF and then ON command to all power
supplies,
2. Toggling Off and then ON the ENABLE signal
3. Removing and reapplying input commercial power to the
entire system.
The power supplies should be turned OFF for at least 20 – 30
seconds in order to discharge all internal bias supplies and
reset the soft start circuitry of the individual power supplies.
Auto_restart (D9h) : Auto-restart is the default configuration
for overvoltage, overcurrent and overtemperature shutdowns.
However, overvoltage has a unique limitation. An overvoltage
shutdown is followed by three attempted restarts, each restart
delayed 1 second, within a 1 minute window. If within the 1
minute window three attempted restarts failed, the unit will
latch OFF. If within the 1 minute less than 3 shutdowns
occurred then the count for latch OFF resets and the 1 minute
window starts all over again.
This command resets the power supply into the default auto-
restart configuration.
Isolation test (DAh): This command verifies functioning of
output OR’ing. At least two paralleled power supplies are
required. The host should verify that N+1 redundancy is
established. If N+1 redundancy is not established the test can
fail. Only one power supply should be tested at a time.
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 15
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
1
7
1
1
8
S
Slave address Wr
A
Command Code 0xDC
1
1
7
1
1
A
Sr Slave Address Rd
A
1
8
1
8
1
S Slave address Wr ACommand 0xE1
A
1
8
1
8
1
Sr Slave address Rd A Byte count = 5 A
8
1
8
1
8
1
8
1
Adjustment %
A
Fan-1
A
Fan-2
A
Fan-3
A
8
1
1
PEC NA P
1
7
1
1
8
1
S
Slave address Wr A Command Code 0xDE A
1
7
1
1
8
1
Sr Slave Address Rd A Byte count = 4 A
8
1
8
1
8
1
Time - LSB A Time A Time - MSB A
8
1
1
PEC No-ack P
Verifying test completion should be delayed for approximately
30 seconds to allow the power supply sufficient time to
properly execute the test.
Failure of the isolation test is not considered a power supply
FAULT because the N+1 redundancy requirement cannot be
verified. The user must determine whether a true isolation fault
indeed exists.
Read input string (DCh) : Reads back the input voltage and
input power consumed by the power supply. In order to
improve the resolution of the input voltage reading the data is
shifted by 75V.
Fan_speed_set (DFh) : This command instructs the power
supply to increase the speed of the fan. The transmitted data
byte represents the hex equivalent of the duty cycle in
percentage, i.e. 100% = 0 x 64h. The command can only
increase fan speed, it cannot instruct the power supply to
reduce the fan speed below what the power supply requires
for internal control.
Fan_normal_speed (E0h): This command returns fan control
to the power supply. It does not require a trailing data byte.
Read_Fan_speed (E1h) : Returns the commanded fan speed in
percent and the measured fan speed in RPM from
the individual
fans. Up to 3 fans are supported. If a fan does not exist (units
may contain from 1 to 3 fans), or if the command is
not supported the unit return 0x00.
8
1
8
1
Byte Count = 4
A
Voltage
A
8
1
8
1
8
1
1
Power - LSB A Power - MSB A PEC No-ack P
Read_firmware_rev [0 x DD]: Reads back the firmware
revision of all three µC in the power supply.
1
7
1
1
8
1
S
Slave address Wr
A
Command Code 0xDD A
1
1
7
1
1
8
1
A
Sr Slave Address Rd
A
Byte Count = 4
A
8
1
8
1
Primary micro revision
A
DSP revision
A
8
1
8
1
1
I2c Micro revision
A
PEC No-ack
P
For example; the read returns one byte for each device (i.e. 0 x
002114h ). The sequence is primary micro, DSP, and I2C micro.
0x00 in the first byte indicates that revision information for the
primary micro is not supported. The number 21 for the DSP
indicates revision 2.1, and the number 14 for the i2c micro
indicates revision 1.4.
Read_run_timer [0 x DE]: This command reads back the
operational ON state in hours. The operational ON state is
accumulated from the time the power supply is initially
programmed at the factory. The operational ON state includes
standby and delivery of main output power. Recorded
capacity is approximately 10 years.
Stretch_LO_25ms (E2h) : Command used for production test
of the clock stretch feature.
None supported commands or invalid data: The power
supply notifies the MASTER if a non-supported command has
been sent or invalid data has been received. Notification is
implemented by setting the appropriate STATUS and ALARM
registers and setting the SMBAlert# flag.
Fault
Management
The power supply records faults in the STATUS and ALARM
registers above and notifies the MASTER controller as
described in the Alarm Notification section of the non-
conforming event.
The STATUS and ALARM registers are continuously
updated with
the latest event registered by the rectifier monitoring circuits. A
host responding to an SMBusALERT# signal may receive a
different state of the rectifier if the state has changed from the
time the SMBusALERT# has been triggered by the rectifier.
The power supply differentiates between internal faults that
are within the power supply and external faults that the
power supply protects itself from, such as overload or input
voltage out of limits. The FAULT LED, FAULT PIN or i2c alarm is
not asserted for EXTERNAL FAULTS. Every attempt is made to
annunciate External Faults. Some of these annunciations can
be observed by looking at the input LEDs. These fault
categorizations are predictive in nature and therefore there is
a likelihood that a categorization may not have been made
correctly.
Input voltage out of range: The Input LED will continue
blinking as long as sufficient power is available to power the
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 16
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
LED. If the input voltage is completely gone the Input LED is
OFF.
tate Change
Definition
A state_change is an indication that an event has occurred
that the MASTER should be aware of. The following events
shall trigger a state_change;
Initial power-up of the system when AC gets turned ON .
This is the indication from the rectifier that it has been
turned ON. Note that the master needs to read the status
of each power supply to reset the system_interrupt. If the
power supply is back-biased through the 8V_INT or the
5VSTB it will not issue an SMBALERT# when AC power is
turned back ON.
Whenever the power supply gets hot-plugged into a
working system. This is the indicator to the system
(MASTER) that a new power supply is on line.
Any changes in the bit patterns of the STATUS and ALARM
registers are a STATUS change which triggers the
SMBALERT# flag. Note that a host-issued command such
as CLEAR_FAULTS will not trigger an SMB
Hot plug
procedures
Careful system control is recommended when hot plugging a
power supply into a live system. It takes about 15 seconds for
a power supply to configure its address on the bus based on
the analog voltage levels present on the backplane. If
communications are not stopped during this interval, multiple
power supplies may respond to specific instructions because
the address of the hot plugged power supply always defaults
to xxxx000 (depending on which device is being addressed
within the power supply) until the power supply configures its
address.
The recommended procedure for hot plug is the following: The
system controller should be told which power supply is to be
removed. The controller turns the service LED ON, thus
informing the installer that the identified power supply can be
removed from the system. The system controller should then
poll the module_present signal to verify when the power
supply is re-inserted. It should time out for 15 seconds after
this signal is verified. At the end of the time out all
communications can resume.
Predictive
Failures
Alarm warnings that do not cause a shutdown are
indicators
of
potential future failures of the power supply. For example, if
a thermal sensor failed, a warning is issued but an immediate
shutdown of the power supply is not warranted.
Another example of potential predictive failure mechanisms
can be derived from information such as fan speed when
multiple fans are used in the same power supply. If the speed
of the fans varies by more than 20% from each other, this is an
indication of an impending fan wear out.
The goal is to identify problems early before a protective
shutdown would occur that would take the power supply out
of service.
External
EEPROM
A 64k-bit EEPROM is provided across the I2C bus. This EEPROM
is used for both storing FRU_ID information and for providing a
scratchpad memory function for customer use.
Functionally the EEPROM is equivalent to the ST M34D64 part
that has its memory partitioned into a write protected upper ¼
of memory space and the lower ¾ section that cannot be
protected. FRU_ID is written into the write protected portion of
memory.
Write protect feature: Writing into the upper 1/4 of memory
can be accomplished either by hardware or software.
The power supply pulls down the write_protect (Wp) pin to
ground via a 500Ω resistor between the ‘module_present’
signal pin and Logic_GRD (see the Module Present Signal
section of Input Signals). Writing into the upper ¼ of memory
can be accomplished by pulling HI the module_present pin.
An alternative, and the recommended approach, is to issue the
Enable_write command via software.
Page implementation: The external EEPROM is partitioned into
32 byte pages. For a write operation only the starting
address
is
required. The device automatically increments the memory
address for each byte of additional data it receives.
However, if
the 32 byte limit is exceeded the device executes a wrap-
around that will start rewriting from the first address specified.
Thus byte 33 will replace the first byte written, byte 34 the
second byte and so on. One needs to be careful therefore not
to exceed the 32 byte page limitation of the device.
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 17
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Table 1:
FRU_ID
The upper quarter of memory starting from address 6144 shall be reserved for factory ID and factory data.
Memory Memory
Location Location
Decimal (HEX)
Length
(bytes)
Format Static Description
Value
Type
No
tes/Example
6144d 0x1800
12
ASCII Fixed GE-energy - Product ID CP2725AC54TE
6156d 0x180C
10
ASCII Fixed GE-energy – Part Number 123456789x or C123456789
6166d 0x1816
6
ASCII Variable GE-energy - Hardware revision x:xxxx controlled by PDI series #
6172d 0x181C
6
ASCII Variable spare
6178d 0x1822
14
ASCII Variable GE-energy - Serial_No 01KZ51018193xx
01 …. Year of manufacture - 2001
KZ … factory, in this case Matamoros
51 .. week of
manufacture
018193xx serial # mfg choice
6192d 0x1830
40
ASCII Variable GE- Manufacturing location “Matamoros, Tamps, Mexico”
6232d 0x1858
8
ASCII Fixed spare
6240d 0x1860
2
HEX Fixed spare
6242d 0x1862 158 ASCII Fixed Customer Information These fields are reserved for use by the
customer.
6400d 0x1900
5
HEX Fixed M, B, & R for voltage read M & B are 2 bytes each sent as MSB and then
LSB. R is one byte. These are stored as two’s
complement.
See the section on Direct Mode Constants
Stored in the EEPROM for the constants stored
in these fields
6405d 0x1905
5
HEX Fixed M, B, & R for current read
6410d 0x190A
5
HEX Fixed M, B, & R temp read
6415d 0x190F
5
HEX Fixed spare
6420d 0x1914
5
HEX Fixed M, B, & R for voltage set
6425d 0x1919
5
HEX Fixed M, B, & R for input voltage read
6430d 0x191E
1
HEX Variable Validation CHKSUM
6431d 9x191F
5
HEX Fixed M, B, & R for input power read
6436d 0x1924
5
HEX Fixed M, B, & R for fan percent adjust
6441d 0x1929
5
HEX Fixed M, B, & R for fan RPM read
6446d 0 x 192E
5
HEX Fixed M, B, & R for converter input
voltage read
Notes:
Memory locations 0x00 to 0x17FF and 0x1A00 to 0x2000 are blank (0xFF). Locations 0x1800 to 0x19FF contain FRUID, locations not specified are
filled with 0’s. Checksum is the complement of the sum of locations 0x1800 to 0x19FF (chksum = 0xFF – sum(0x1800-0x19FF)), excluding serial
number field (checksum will always be the same since all fields are fixed except serial number).
Table 2: Alarm and LED state
summary
Power Supply LED State Monitoring Signals
C
o
ndi
tion
AC
O
K
Green
DC OK
Green
Service
Amber
Faul
t
Red
Fault OTW
PFW
Module
Present
OK
1
1
0
0
HI HI HI
LO
Thermal Alarm (5C before shutdown)
1
1
1
0
HI
L
O HI
LO
Thermal Shutdown
1
0
1
1
LO
L
O
LO
LO
Defective Fan
1
0
0
1
LO
HI
LO
LO
Blown AC Fuse in Unit
1
0
0
1
LO
HI
LO
LO
AC Present but not within limits Blinks
0
0
0
HI HI
—
4
LO
AC not present1
0
0
0
0
HI HI
LO
LO
Boost Stage Failure
1
0
0
1
LO
HI
LO
LO
Over Voltage Latched Shutdown
1
0
0
1
LO
HI
LO
LO
Over Current
1
Blinks
0
0
HI HI
LO
LO
Non-catastrophic Internal Failure2
1
1
0
1
LO
HI HI
LO
Missing Module HI
Standby (remote)
1
0
0
0
HI HI
LO
LO
Service Request (PMBus mode)
1
1
Blinks
0
HI HI HI
LO
Communications Fault (RS485 mode)
1
1
0
Blinks HI HI HI
LO
1 This signal is correct if the rectifier is back biased from other rectifiers in the shelf .
2 Any detectable fault condition that does not cause a shutting down. For example, ORing FET failure, boost section out of regulation, etc.
3 Signal transition from HI to LO is output load dependent
4 The PFW signal changes states when the boost voltage decays and not when the AC is out of regulation.
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 18
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
Table 3: Signal
Definitions
All hardware alarm signals (Fault, PFW, OTW, Power Capacity) are open drain FETs. These signals need to be pulled HI to either 3.3V or 5V.
Maximum sink current 5mA. An active LO signal (< 0.4VDC) state. All signals are referenced to Logic_GRD unless otherwise stated.
Function
Label
T
y
pe
Description
Output Enable Enable Input If shorted to Logic_GRD main output is ON in Analog or PMBus mode.
Power Fail Warning PFW Output An open drain FET; Changes to LO 5msec before the output decays below
40
V
DC
.
I2C Interrupt Alert#_0/Alert#_1 Output This signal is pulled to 3.3V via a 10kΩ resistor. Active LO.
Rectifier Fault Fault Output An open drain FET; normally HI, changes to LO.
Module Present MOD_PRES Output Short pin, see Status and Control description for further information on this signal.
ON/OFF ON/OFF Input Short pin, controls main output during hot-insertion and extraction. Ref: Vout ( - )
Protocol select Protocol Input Selects operational mode. Ref: Vout ( - ). No-connect PMBus, 10kΩ - RS485
Margining Margin Input Changes the default set point of the main output.
Over-Temperature Warning OTW Output Open drain FET; normally HI, changes to LO 5°C prior to thermal shutdown.
Power Capacity POWER_CAP Output Open drain FET; HI indicates 2725W operation and LO indicates 1200W operation.
Rectifier address Unit_addr Input Voltage level addressing of Rectifiers within a single shelf. Ref: Vout ( - ).
Shelf Address Shelf_addr Input Voltage level addressing of Rectifiers within multiple shelves. Ref: Vout ( - ).
Back bias 8V_INT Bi-direct Used to back bias the DSP from operating Rectifiers. Ref: Vout ( - ).
Mux Reset Reset Input Resets the internal PCA9541 multiplexer
Standby power 5VA Output 5V at 0.75A provided for external use
Current Share Ishare Bi-direct A single wire active-current-share interconnect between modules Ref: Vout ( - ).
I2C Line 0 SCL_0 Input PMBus line 0.
I2C Line 0 SDA_0 Bi-direct PMBus line 0.
I2C Line 1 SCL_1 Input PMBus line 1.
I2C Line 1 SDA_1 Bi-direct PMBus line 1.
SMBALERT# Line 0 ALERT#_0 Output PMBus line 0 interrupt
SMBALERT# Line 1 ALERT#_1 Output PMBus line 1 interrupt
RS485 Line RS_485+ Bi-direct RS485 line +
RS485 Line RS_485- Bi-direct RS485 line -
Conformal Coated
Product
The rectifier can be ordered with conformal coating for additional protection against either humidity or dust born particles. Below
are the basic processes
1. Conformal coating applied to both sides of the main board and control cards. Connector connections are masked to
ensure that the coating does not penetrate connector contacts.
2. CMPD1 conformal coating applied on indicated areas without masking all exposed SMT components, solder joints, open
traces, thru-hole leads and vias on the bottom of the pcb. Overspill on adjacent components is acceptable.
3. Coating material: Liquid HUMISEAL 1A33 POLYURETHANE CONFORMAL COATING. GE COMCODE: 450023185. HUMISEAL
PART NUMBER: 1A33 PB65
4. Minimum 3 mils thickness applied as uniformly as possible
5. Cured fully before sheet metal assembly. Curing process: 11HR @ 88C
6. Conformal coating passes standard IPC-A-610 Class 2
April 19, 2018 ©2018 General Electric Company. All rights reserved. Page 19
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
SIGNAL
OUTPUT POWER INPUT POWER
6
5
4
3
2
1
P7
P6
P5
P4
P3
P2
P1
A
SCL_0 MOD_ PRES PFW LOGIC_GRD
RS_485+ UNIT_ADDR
EARTH
(GND)
B
SCL_1 OTW Alert#_0 Alert#_1 RS_485- 8V_INT
V
_OUT
V
_OUT
V
_OUT
V
_OUT LINE-2 LINE-1
C
SDA_0 Margin Enable Reset Ishare Protocol (-
)
(+) (+) (-
)
(Neutral) (HOT)
D
SDA_1 Fault
5VA
Power_Cap
ON/OFF SHELF_ADDR
Note: Connector is viewed from the rear
positioned
inside the rectifier
Signal pins columns 1 and 2 are
referenced
to V_OUT (–)
Signal pins columns 3 through 6 are
referenced
to Logic GRD
Last to make-first to break shortest pin
Earth
First make-last to break longest pin
implemented
in the mating connector
Mechanical
Outline
Dimensions
351.2
mm
(13.85
in)
101.6mm
(4.00
in)
Top
View
41.4mm
(1.63 in)
Front View Rear View
Front Panel LEDs
Analog Mode I2C Mode RS485 M
o
de
ON: Input ok
Blinking: Input out of limits
ON: Output ok
Blinking: Overload
ON: Over-temperature Warning ON: Over-temperature Warning
Blinking: Service ON: Over-temperature Warning
!
ON: Fault ON: Fault
Blinking: Not communicating
Output
Connector
Mating Connector: right angle PWB mate – all pins: TE 6450572-1, right angle PWB mate except pass-thru input power: TE 6450378-1
A6 A1 P7 P1
Manufacturer part numbers: FCI
51939-568
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @
4W
Data
Sheet
Ordering
Information
Please contact your GE Power Sales Representative for pricing, availability and optional features.
Table 4: Device Codes
Item
Description
Comcode
CP2725AC54TEZ 54VDC @ 50A, 5VDC @ 0.75A, RoHS 6/6 CC109149423
CP2725AC54TEP 54VDC @ 50A, 5VDC @ 0.75A, RoHS 6/6, POE compliant CC109167532
CP2725AC54TEZ-LCC 54VDC @ 50A, 5VDC @ 0.75A, RoHS 6/6, Conformal Coated, Laser Tuned 1600115617A
Accessories
Item
Description
Comcode
Power supply interface board 150037482
Isolated Interface Adapter Kit – interface between a USB port
and the I2C connector on the power supply interface board
150036482
. The site below downloads the GE Digital Power Insight™
software tools, including the cpgui_l. When the download is
complete, icons for the various utilities will appear on the
desktop. Click on cpgui_l.exe to start the program
after the download is complete.
http://apps.geindustrial.com/publibrary/checkout/Software%7
CCPSW-DPI%7Cgeneric
Graphical User Interface Manual; The GUI download created a
directory In that
directory start the DPI_manual.pdf file.
Contact Us
For more information, call us at
USA/Canada:
+1 888 546 3243, or +1 972 244 9288
Asia-Pacific:
+86.021.54279977*808
Europe, Middle-East and Africa:
+49.89.878067-280
www.gecriticalpower.com
GE Critical Power reserves the right to make changes to the product(s) or information contained herein without notice, and no
liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such
product(s) or information.
April 19, 2018 ©2018 General Electric Company. All International rights reserved. Page 20
