CPA250-4530G - Power-One - Datasheet.Live

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 1 of 19 www.power-one.com

Features

• RoHS lead-free-solder and lead-solder-exempted

products are available

• Compliant with PICMG® CompactPCI® specifications

• Wide range DC or AC input with PFC

• Extremely high efficiency and high power density

• Low inrush current

• 4 high current outputs with flexible load distribution

• Integrated ORing FETs / diodes for true redundancy

• Inhibit and enable inputs

• Remote sense lines

• Single-wire current share function for 3 outputs

• Hot-swap capability

• 47-pin connector, type Positronic

• Overtemperature, overvoltage, overcurrent, and

overpower protection

Description

The CPA and CPD Series are highly reliable power supplies

for CompactPCI® systems, which are increasingly used in

communications, industrial, military, aerospace, and other

applications. These power supplies of fer high power density

in plug-in modules that meet the requirements of the

PICMG® power interface specification for CompactPCI®

systems.

The converters use the patented EDGETM technology and

provide important advantages such as flexible output

power, extremely high efficiency, excellent reliability, full

input-to-output isolation, negligible inrush current, hot-swap

capability, soft start, and overtemperature protection.

The input is protected by a transient suppressor (varistor)

against surges and transients occurring on the source lines

and cover an operating input voltage range from either 90 to

264 VAC or 36 to 75 VDC.

The outputs are protected against continuous overload,

open-circuit, and short-circuit. Full n+1 redundant operating

mode is made possible by integrated ORing FETs or ORing

Table of Content s Page Page

Safety according to IEC/EN 60950-1 2nd Ed. and

UL/CSA 60950-1 2nd Ed.

162.5

6.4"

100

3.94

3 U

40.6

1.6"

8 HP

162.5

6.4"

233.3

7.8"

6 U

40.4

1.6"

8 HP

Description ....................................................................... 1

Model Selection ............................................................... 2

Functional Description ..................................................... 3

Electrical Input Data......................................................... 5

Electrical Output Data ...................................................... 7

Auxiliary Functions......................................................... 10

Electromagnetic Compatibility (EMC) ............................ 13

Immunity to Environmental Conditions .......................... 15

Mechanical Data ............................................................ 16

Safety and Installation Instructions................................ 17

Options........................................................................... 19

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 2 of 19 www.power-one.com

diodes. When several converters are connected in parallel,

a single-wire connection between converters ensures

current sharing.

The converters are designed as two or three separate

forward converters with fixed switching frequency and

synchronous rectifiers at their output.

LEDs on the front panel and various warning signals display

the status of the converter. The aluminum case acts as a

heat sink and as an RFI shield. It is designed for vertical

insertion into 19" rack systems, but it can also be mounted

in any other position, as long as the necessary airflow is

ensured. The connector is a 47-pin type from Positronic or

similar.

Several options are available to meet different

requirements.

Model Selection

Table 1: Standard models

Model3Output Operating input Rated power1Efficiency2Case Options

range ηη

ηη

No. Vo nom Io nom Io max Vi min – Vi max Po nom 1min typ

[V] [A] [A] fi min – fi max [W] [%] [%]

CPD200-4530 Vo1 5.0 20 40 36 – 75 VDC 200 80 82.2 3U x 8HP G 7

Vo2 3.3 20 40

Vo3 12 2.5 5.5

Vo4 –12 0.5 2

CPD250-4530 Vo1 5.0 25 40 250 80 82.2 3U x 8HP L 5, C

6, G 7

Vo2 3.3 20 40

Vo3 12 4 5.5

Vo4 –12 1 2

CPD500-4530G Vo1 5.0 40 50 500 83 84.5 6U x 8HP C 6

Vo2 3.3 50 60

Vo3 12 8 12

Vo4 –12 3 4

CPA200-4530 Vo1 5.0 20 40 90 – 264 VAC 200 81.5 83 3U x 8HP G 7

Vo2 3.3 20 40 47 – 63 Hz 4

Vo3 12 2.5 5.5

Vo4 –12 0.5 2

CPA250-4530 Vo1 5.0 25 40 250 81.5 82.6 3U x 8HP L 5, C

6, G 7

Vo2 3.3 20 40

Vo3 12 4 5.5

Vo4 –12 1 2

CPA500-4530 Vo1 5.0 40 50 500 83 84.3 6U x 8HP F 8, L

5, C

Vo2 3.3 50 60 G 7

Vo3 12 8 12

Vo4 –12 3 4

CPA550-4530 Vo1 5.0 50 50 550 83 84.5 6U x 8HP G 7

Vo2 3.3 50 60

Vo3 12 8 12

Vo4 –12 3 4

1The sum of the power of all outputs may not exceed the total power for the specified required forced-air cooling.

2Efficiency at TA = 25 °C, Vi nom, Io nom.

3Models ending with G are RoHS-compliant for all 6 substances.

4Rated input voltage range is 100 – 240 VAC, rated input frequency range is 50 – 60 Hz.

5Option L: Permanent shutdown in the case of overcurrent; see Options

6Option C: PCBs covered with a protective lacquer; see Options

7Option G: RoHS-compliant for all 6 substances. G is always placed at the end of the part number.

8Option F: 2nd fuse in the neutral line; see Options

Models highlighted in yellow are not for new designs.

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 3 of 19 www.power-one.com

Fig. 1a

Block diagram of CPA/CPD200 and CPA/CPD250

models. For the pin allocation, see Mechanical Data.

Linear

regulator

ORing

FET

ORing

FET

ORing

FET

ORing

diode

Secondary

control

circuit

03110e

Input filter

Boost converter ≈135 kHz

Inrush

current

limiter Forward

converter

≈135 kHz

Only CPA models have a bridge

rectifier and a boost converter

Forward

converter

≈135 kHz

Secondary

control

circuit

Secondary

control

circuit

Primary

control

circuit Primary

control

circuit

Fuse

–

Bridge

rectifier

ACN

+DCIN

ACL

–DCIN

Functional Description

The inputs of all converters are protected against surges

and transients occurring on the source lines. A highly

efficient input filter and an active inrush current limiter

ensure a very low inrush current of short duration. This

prevents circuit breakers and fuses from tripping at switch-

on.

All CPA models have an additional bridge rectifier and a

boost converter to provide active power factor correction

(PFC) according to EN 61000-3-2.

The CPx200/250 models (see fig.1a) are equipped with two

independent high efficient 2-switch forward converters,

switching 180° out of phase to minimize the ripple current at

the input.

On the secondary side, two high-current synchronous

rectifiers supply Vo1 (5 V) and Vo2 (3.3 V) with up to 40 A.

The secondary-controlled Vo3 (+12 V) post regulator is

supplied by an additional winding of the 3.3 V main

transformer. The linear regulator for Vo4 (–12 V) is supplied

from the output choke of the Vo3 output. The output filters

reduce ripple and noise to a minimum without com-

promising the dynamic response.

The models CPD500 (fig. 1b) and CPA500/550 (fig. 1c)

exhibit a third forward converter for both outputs Vo3 and

Vo4. The outputs Vo1 an Vo2 provide up to 50 and 60 A.

All outputs are fully regulated and protected from the bus by

decoupling FETs or diodes. A current monitor calculates the

output power. As soon as the output power exceeds the

maximum threshold level, the converter starts to reduce the

output power by decreasing the output voltages.

In contrast to the outputs Vo1 (5 V), Vo2 (3.3 V), and Vo3

(+12 V) with active current sharing, output Vo4 (–12 V) has a

droop characteristic for passive current sharing.

If for some reason the voltage of any output exceeds the

nominal value significantly, the converter is permanently shut

down. If option L is fitted, this occurs as well, if the max.

output current is exceeded for a predefined time. To reset,

the input voltage must be removed for a short time.

Power-One's Efficient Dual Geometric Edge Technology

(EDGETM) facilitates high current density, increases

reliability by reducing component stresses, and decreases

the amount of heat dissipated. The backbone of this

patented technology is an interleaved, multi-channel

forward converter utilising a transitional resonant switching

Product Marking

Label with specific type designation, applicable safety

approvals and recognition marks, CE mark, warnings,

Power-One patents, company logo, input voltage range,

nominal output voltages and output currents, degree of

protection, batch no., serial no., and data code including

production site, modification status, and date of production.

Identification of LEDs on the front panel.

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 4 of 19 www.power-one.com

ORing

FET

ORing

FET

ORing

FET

Secondary

control

circuit

JM041

+DCIN

–DCIN

Input filter

Dual interleaved boost

converter ≈110 kHz

Inrush current limiter with

reverse polarity protecton

Forward

converter

≈135 kHz

Forward

converter

≈135 kHz

Secondary

control

circuit

Secondary

control

circuit

Primary

control

circuit Primary

control

circuit

Forward

converter

≈135 kHz

ORing

diode V

Secondary

control

circuit

Primary

control

circuit

Fuse

Auxiliary

con-

verter

PBias

SBias

VDR

Fig. 1b

Block diagram of CPD500 models.

For the pin allocation, see Mechanical Data.

Fig. 1c

Block diagram of CPA500/550 models.

For the pin allocation, see Mechanical Data.

ORing

FET

ORing

FET

ORing

FET

Secondary

control

circuit

JM014a

ACN

ACL

Input filter

Boost converter ≈135 kHz

Inrush

current

limiter Forward

converter

≈135 kHz

Forward

converter

≈135 kHz

Secondary

control

circuit

Secondary

control

circuit

Primary

control

circuit Primary

control

circuit

Forward

converter

≈135 kHz

ORing

diode V

Secondary

control

circuit

Primary

control

circuit

Fuse

fuse

(option F)

Bridge

rectifier

Auxiliary

con-

verter

VPBias

VSBias

technique and proprietary leading and trailing-edge pulse-

width modulation. It has a proven track record in high-

availability power solutions.

The switching frequency is typically 135 kHz. Some models

(CPx200/250 version V117, CPA500/550 version V110)

exhibit a crystal oscillator with 131 kHz.

All models have a separate auxiliary supply for the primary

circuits, the CPD500 as well for the secondary circuits. The

secondary bias voltage of the other models is generated by

the forward converters.

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 5 of 19 www.power-one.com

Electrical Input Data

General Conditions:

TA = 25 °C, unless TC is specified.

Table 2a: Input data of CPD models

Input CPD200/250 CPD500 Unit

Characteristics Conditions min typ max min typ max

ViOperating input voltage Io = 0 – Io max 36 75 36 75 VDC

Vi nom Nom. input voltage TC min – TC max 48 48

Vi abs Input voltage limits without damage 0 80 0 80

IiTypical input current Vi nom, Io nom 5.1/6.3 2 12.5 A

Ii max Max. input current Vi min, Io nom 7.0/8.7 2 7.6/9.5 2 17 17.5

Iinr p Peak inrush current Vi max, Io nom 12 25

Pi0 No-load input power Vi min, Io = 0 14 28.6 W

Vi nom, Io = 0 18 28

Vi max, Io = 0 27 30 27.5 31

Pi inh Input power, when inhibited Vi min – Vi max 3.2 9.4

CiInput capacitance 1360 15 µF

fswitch Switching frequency Vi nom, Io nom 135 135 kHz

thHold-up time Vi min→ 0 V, Io nom 45 ms

tbo Brown-out time 4 Vi nom, Io nom 45

tsu Start-up time Vi nom, Io nom 150 200 1500

Table 2b: Input data of CPA models

Input CPA200/250 CPA500/550 Unit

Characteristics Conditions min typ max min typ max

ViRated input voltage range Io = 0 – Io max 100 240 100 240 VAC 1

Vi op Operating input voltage TC min – TC max 90 264 90 264

Vi nom Nom. input voltage 50 – 60 Hz 1230 230

Vi abs Input voltage limits without damage 0 5 280 0 280

IiTypical input current Vi nom, Io nom 1.1/1.4 2 2.8/3.1 3 A

Ii max Max. input current Vi min, Io nom 2.9/3.6 2 3.2/4.0 2 7.1/7.8 3

Iinr p Peak inrush current Vi max, Io nom 15 20

Pi0 No-load input power Vi min – Vi max 23 30 26 32 W

Io = 0

Pi inh Input power, when inhibited Vi min – Vi max 3.2 3.2

CiInput capacitance 1 4 µF

fswitch Switching frequency Vi nom, Io nom 135 135 kHz

thHold-up time Vi min→ 0 V, Io nom 20 20 ms

tbo Brown-out time 4 Vi nom, Io nom

tsu Start-up time Vi nom, Io nom 150 150

Power factor Vi nom, Io nom 0.95 0.95 W/VA

1Rated input frequency: 50 – 60 Hz, operating input frequency range: 47 – 63 Hz

2First value for CPD/CPA200, 2nd value for CPD/CPA250

3First value for CPA500, 2nd value for CPA550

4Short interruption of Vi without affecting the outputs

5CPA200/250 with version V117 or higher, as they are equipped with an input voltage trigger

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 6 of 19 www.power-one.com

JM018a

0 50 100 150 200 250 VAC

CPA200/250

CPA500/550

η [%]

JM042

40 50 60 70 V

η [%]

CPD500

Fig. 2a

CPA Series: Efficiency versus input voltage

Input Fuse and Reverse Polarity Protection

A metal oxide varistor (voltage dependent resistor VDR)

together with the input filter form an effective protection

against high input voltage transients, which typically occur

in most installations.

An incorporated fuse protects the converter against further

damage in the case of a failure.

Note: The fuse is not customer-accessible.

Table 3: Fuse specification

Model Fuse rating Reference

CDP200/250 250 V, 12. 5 A T Schurter SPT 5x20, 0001.2515

CPA200/250 250 V, 5 A T Schurter SPT 5x20, 0001.2511

CPD500 80 V, 25 A F Littlefuse FKS, 166.7000.525

CPA500/550 250 V, 10 A T Schurter MXT250, 0034.6925

To avoid unwanted power losses, the CPD200/250 models

are not protected against reverse polarity at the input by a

serial diode, but only with an antiparallel diode. In the case

of reversed input voltage, the input fuse will blow; however

no further damage will occur.

The CPD500 models are protected against reverse polarity

by a special circuitry, which generates no losses. The

converter will simply not start-up, but no damage will occur.

The CPA Series converters are designed for AC input and

have a rectifier bridge on the input.

Input Current Limitation

All converters incorporate an active inrush current limiter in

the input circuitry, which reduces the peak inrush current

value by a factor of 10 – 15 to protect connectors and

switching devices from damage.

Note: The inrush current limitation is achieved using an

electronic circuitry. For effective limitation the converter

should not be switched on and off more frequently than every

8 seconds.

Input Undervoltage Shutdown

CPD200/250 models start at approx. Vi = 22 V, when the

input voltage is applied; at decreasing Vi, they switch off at

approx. 21 V.

Note: The input current Ii may exceed Ii max, if Vi ≤ Vi min.

CPD500 models start at Vi = 35 V and switch off at Vi = 33 V.

CPA models exhibit an undervoltage trigger controlling

start-up and shut down. The threshold is between 80 and 90

VAC. See also Power Fail Signal.

Note: CPA200/250 with version ≤V116 should not be

operated at Vi ≤Vi min, as these models have no undervoltage

shutdown and will therefore operate with a high input

current at full load.

Fig. 2b

CPD500 Series: Efficiency versus input voltage

Efficiency

The efficiency is specified in table 1. Its dependence upon

the input voltage Vi is shown in fig. 2a (CPA models) and fig.

2b (CPD500 models). The efficiency of CPD200/250

models depends only marginally upon Vi.

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 7 of 19 www.power-one.com

Table 4a: Output data of CPD/CPA200 and CPD/CPA250

Output Vo1 (5.0 V) Vo2 (3.3 V) Unit

Characteristics Conditions min typ max min typ max

VoOutput voltage Vi nom, 50% Io nom 4.95 5.0 5.05 3.25 3.3 3.35 VDC

Io nom Nominal output current 20/25120 A

Io max Max. output current Vi min – Vi max 40 40

IoL Output current limit TC min – TC max 50 50

Io min Minimum load no min. load required no min. load required

voOutput Switch. frequ. Vi nom, Io nom 25 20 mVpp

voltage BW = 20 MHz 4

noise4Total Cext = 22 µF + 100 nF 60 60

∆VoV Static line regulation Vi min – Vi max, Io nom ±10 ±10 mV

∆VoL Static load regulation Vi nom, 50 – 100% Io max ±10 ±10

∆VoS Overshoot at switch on/off 0 0

vo d Dynamic Voltage Vo1: ∆Io1 = 10 A, d Io1/dt = 2 A/µs ± 120 ± 120

load deviation Vo2: ∆Io2 = 10 A, d Io2/dt = 2 A/µs

tdregulation Recovery time 100 100 µs

αVoTemperature coefficient TC min – TC max ±0.3 ±0.2 mV/K

of output vol tage 0 – Io nom, Vi min – Vi max

Electrical Output Data

General Conditions for table 4:

– TA = 25 °C, unless Tc is specified.

– CPD/CPA200: 250 LFM (1.25 m/s), CPD/CPA250: 400 LFM (2 m/s)

– Sense lines connected directly at the connector

Table 4b: Output data of CPD/CPA200 and CPD/CPA250

Output Vo3 (+12 V) Vo4 (–12 V) Unit

Characteristics Conditions min typ max min typ max

VoOutput voltage Vi nom, 50% Io nom 11.76 12.0 12.24 –11.30 –12.0 –12.48 VDC

Io nom Nominal output current 2.5/410.5/11A

Io max Max. output current Vi min – Vi max 5.5 2

IoL Output current limit TC min – TC max 7 3.5

Io min Minimum load Io3 > 75% Io42no min. load required

voOutput Switch. frequ. Vi nom, Io nom mVpp

voltage BW = 20 MHz 4

noise 4Total Cext = 22 µF + 100 nF 120 120

∆VoV Static line regulation Vi min – Vi max, Io nom ±10 ± 10 mV

∆VoL Static load regulation Vi nom, Io = 1 – 2 A ±30 –3803

∆VoS Overshoot at switch on/off 0 0

vo d Dynamic Voltage Vo3: ∆Io3 = 2 A, d Io3/dt = 2 A/µs ± 200 ± 200

load deviation Vo4: ∆Io4 = 0.5 A, dIo4/dt = 2 A/µs

tdregulation Recovery time 500 500 µs

αVoTemperature coefficient TC min – TC max ±0.3 ±0.5 mV/K

of output voltage 0 – Io nom, Vi min – Vi max

1First value for CPD200/CPA200, second value for CPD250/CPA250

2Minimum load is only required to maintain regulation of output Vo4

3Droop characteristic for passive current sharing

4Measured with a probe according to IEC/EN 61204, annex A

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 8 of 19 www.power-one.com

Table 5a: Output data of CPD500 and CPA500/550

Output Vo1 (5.0 V) Vo2 (3.3 V) Unit

Characteristics Conditions min typ max min typ max

VoOutput voltage Vi nom, 50% Io nom 4.95 5.0 5.05 3.25 3.3 3.35 VDC

Io nom Nominal output current 40/50150/501A

Io max Max. output current Vi min – Vi max 50 60

IoL Output current limit TC min – TC max 52.2 62 63 74

Io min Minimum load no min. load required no min. load required

voOutput Switch. frequ. Vi nom, Io nom mVpp

voltage BW = 20 MHz 4

noise 4Total Cext = 22 µF + 100 nF 50 50

∆VoV Static line regulation Vi min – Vi max, Io nom ±10 ±10 mV

∆VoL Static load regulation Vi nom, 50 – 100% Io max ±10 ±10

∆VoS Overshoot at switch on/off 0 0

vo d Dynamic Voltage Vo1: ∆Io1 = 20 A, d Io1/dt = 2 A/µs ± 150 ± 150

load deviation Vo2: ∆Io2 = 40 A, d Io2/dt = 2 A/µs

tdregulation Recovery time 300 300 µs

αVoTemperature coefficient TC min – TC max ±0.3 ±0.2 mV/K

of output voltage 0 – Io nom, Vi min – Vi max

General conditions for table 5:

– TA = 25 °C, unless Tc is specified.

– CPD500, CPA500: 300 LFM (1.5 m/s), CPA550: 400 LFM (2 m/s)

– Sense lines connected directly at the connector

Table 5b: Output data of CPD500 and CPA500/550

Output Vo3 (+12 V) Vo4 (–12 V) Unit

Characteristics Conditions min typ max min typ max

VoOutput voltage Vi nom, 50% Io nom 11.76 12.0 12.24 –11.52 –12.0 –12.48 VDC

Io nom Nominal output current 8 3 A

Io max Max. output current Vi min – Vi max 12 4

IoL Output current limit TC min – TC max 13.5 4.3

Io min Minimum load Io3 > 75% Io42no min. load required

voOutput Switch. frequ. Vi nom, Io nom mVpp

voltage BW = 20 MHz 4

noise 4Total Cext = 22 µF + 100 nF 120 120

∆VoV Static line regulation Vi min – Vi max, Io nom ±10 ±10 mV

∆VoL Static load regulation Vi nom, Io = 2 – 4 A ±50 – 2203

∆VoS Overshoot at switch on/off 0 0

vo d Dynamic Voltage Vo3: ∆Io3 = 4 A, dIo3/dt = 2 A/µs ±200 ±150

load deviation Vo4: ∆Io4 = 1 A, dIo4/dt = 2 A /µ s

tdregulation Recovery time 300 300 µs

αVoTemperature coefficient TC min – TC max ±0.3 ±0.5 mV/K

of output voltage 0 – Io nom, Vi min – Vi max

1First value for CPA500, second value for CPA550

2Minimum load is only required to maintain regulation of output Vo4. No min. load for CPD500.

3Droop characteristic for passive current sharing

4Measured with a probe according to IEC/EN 61204, annex A

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 9 of 19 www.power-one.com

Hold-up Time of CPD Models

For extended hold-up time of CPD models, use external

output capacitors or decoupling diodes and input capacitors

of adequate size.

Formula for additional external input capacitor:

2 • Po • (th total – th) • 100

Ci ext = ––––– –––––––––––––– ––

η • (Vti2 – Vi min2)

whereas:

Ci ext = external input capacitance [mF]

Po= output power [W]

h= efficiency [%]

th total = total hold-up time [ms]

th= hold-up time [ms]

Vi min = minimum input voltage [V]

Vti = threshold level [V]

Note: After Vi was removed, the outputs maintain their

voltage for the time th. Even if Vi comes back during th, but

after th, the output voltage might be affected.

Redundant Operation and Hot Swap

Due to the integrated ORing FETs/diodes, the converters

are designed to be operated in redundant systems.

Hot swap is also possible, but the output voltages of each

bus may deviate dynamically by ≤5% during the plug-in /

plug-out operation.

Note: We recommend connecting some capacitors parallel to

the bus to limit voltage deviations during hot swapping and

during switch-on / switch-off of the input voltage of one of the

parallel-connected converters.

Output Characteristic and Protection

All outputs are fully protected against continuous open-

circuit (no load) and continuous short-circuit conditions.

All outputs of CPx200/250 models have a constant current

limitation with a rectangular characteristic; see figure 3. In

addition, the total power from outputs Vo1, Vo2, and Vo3 is

limited to Po max, resulting in a free choice of load distribution

between these outputs. Output Vo4 is disabled in the case

of overtemperature generated by overcurrent.

In CPA500/550 and CPD500 models, the total power of all

four outputs is limited t o Po max.

In all models, all outputs are monitored for an overvoltage

condition. If an overvoltage of 120 – 130% is dedected, the

converter is permanently disabled. To reset, the input

voltage must be removed for 10 – 20 seconds.

Note: The models CPA500/550 with version ≤V110 need

approx. 60 s to recover.

Thermal Considerations and Protection

If a converter is mounted in the upright position with airflow

as specified in the general conditions of the tables 4 and 5,

allowing unrestricted forced-air cooling, and is operated at

its nominal input voltage and power at maximum ambient

temperature TA max (see Temperatures), the temperature at

the measurement point of the case temperature TC (see

Mechanical Data) will approach after an initial warm-up

phase the indicated maximum value of TC max (105 °C) .

However, the relationship between TA and TC depends

heavily on the operating conditions and the system

integration. The thermal conditions are significantly

influenced by the input voltage, the output current, the

airflow, and the temperature of the adjacent elements and

surfaces. TA max is therefore, contrary to TC max, an indicative

value only.

Fig. 4b

Output power versus temperature TA at Vi nom (CPD/CPA250)

Fig. 4a

Output power versus temperature TA at Vi nom (CPD/

CPA200)

Fig. 3

Typical output characteristic Vo versus Io

0.5

30 40 50 70

o nom

1.0 250 LFM = 1.25 m/s

JM011

A min

90 °C

0.6

Convection cooling

in upright position

0.5

30 40 50 70

o nom

1.0 200 LFM = 1 m/s

05190b

A min

Convection cooling

in upright position

90 °C

400 LFM

= 2 m/s

1.0

0.95

0.5

o nom

o max

o L

05186b

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 10 of 19 www.power-one.com

Auxiliary Functions

Inhibit and Enable

The inhibit input INH# enables (logic high) or disables

(logic low, pull down) all outputs, if a logic signal (TTL,

Fig. 6

Inhibit and enable inputs

Table 6: Inhibit data

Characteristics Conditions min typ max Unit

Vinh Inhibit Vo = off Vi min – Vi max –2 0.8 V

voltage Vo = on Io = 0 – Io max 2.4 50

trRise time 120 ms

tfFall time depending on Io

CMOS) is applied. In systems consisting of several

converters this feature may be used to control the activation

sequence of the converters by means of logic signals, or to

enable the source to start-up, before full load is applied.

Note: If this function is not used, the inhibit pin 39 can be left

open-circuit (not connected). If pin 39 is connected to a return

pin (e.g., pin 22), the internal logic will disable all outputs. The

inhibit input is protected by a decoupling diode.

Pin 27 (EN#) must be connected to a return pin (e.g., pin 22)

to enable the converter. Pin 27 is shorter than the others

ensuring start-up only, when all other pins are already

connected to the system providing true hot-swap capability.

Fig. 7

Typical output response as a function of inhibit voltage.

Inhibit

0.1

Vo/Vo nom

trtf

06155a

Fig. 5

Output filter reducing the output ripple of Vo1 and Vo2

Vo1

RTN

Input

JM010

47 5

–12

–18 Vo2

33 Vo2SENSE

Vo1SENSE

–

++C

5 V

Gnd

3.3 V

Fig. 4c

Output power versus TA at Vi nom (CPA500/550, CPD500)

0.5

30 40 50 70

o nom

1.0

300 LFM = 1.5 m/s (CPA/CPD500)

400 LFM = 2 m/s (CPA550)

JM012a

A min

90 °C

0.6

Convection cooling

in upright position

CPA550

CPA/CPD500

Caution: The installer must ensure that under all operating

conditions TC remains within the limit s shown in the diagrams

fig. 4.

Note: Forced-air cooling (or an additional heat sink on

customer-specific models) can improve the reliability or

allow for higher TA, as shown in the diagrams fig. 4, but TC max

shall never be exceeded.

A temperature sensor fitted on the main PCB provides

approx. 20 °C below TC max a warning signal (DEG#), at

which the control logic begins to reduce the output power.

The output power returns to the normal value, when the

temperature drops back below this limit; see Temperature

Warning and Shutdown.

Output Filter

The output ripple voltage can be reduced by an external

filter to less then 5 mVpp. Recommended values:

• C1, C2: Low ESR capacitor, e.g., OS-CON 100 – 470 µF

• L1, L2: Choke 1 – 4.7 µH with appropriate rated current,

e.g., Coiltronics® HC2LP 1 µH /33 A or 2.2 µH /24 A.

47 RTN

VINH#

06153d

INH# 39

(22)

EN# 27

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 11 of 19 www.power-one.com

Fig.10

Power Fail: JFET output, I FAL# ≤ 10 mA

Sense Lines

This feature is available only for the outputs Vo1, V o2, Vo3,

and allows the compensation of voltage drops across the

connector contacts and if necessary, across the load lines.

To ensure correct operation, all sense lines S+ (Vo1SENSE,

Vo2SENSE, and Vo3SENSE) should be connected to the

respective power outputs. The common sense return S–

(SRTN) should be connected to RTN (pin 5 – 12).

Note: Open sense lines are admissible, but the output

voltage regulation will be poor.

The voltage difference between any sense line at its

respective power output pin (as measured on the

connector) should not exceed the following values.

Note: If the sense lines S+ and S– compensate for a

considerable voltage drop, the output loads shall be reduced

in order to respect the maximum output power.

Temperature Warning and Shutdown

A temperature warning circuitry monitors the case

temperature TC. Its output signal VDEG# changes from high

to low impedance, when the TC exceeds the upper threshold

level, and changes back to high impedance, when TC falls

below the lower threshold level, which is 85 °C ± 5 °C.

Pin 38 (degrade signal DEG#) is internally connected via the

collector-emitter path of an NPN transistor to the signal

return pin 22. The current IDEG# through pin 38 should not

exceed 40 mA, and VDEG# should not exceed 40 V.

If TC exceeds 105 °C, the converter will be disabled. It

resumes operation automatically, once TC falls below 105 °C.

Fig. 8

Degrade signal: NPN output VDEG# ≤40 V, IDEG# ≤20 mA

Vo+

RTN

DEG#

Input

11056a

47 22

Table 7: Sense line data

Output Total voltage difference between sense lines

[V] and their respective outputs

3.3 0.8 V

51 V

12 1 V

Fig. 9

Degrade signal VDEG# versus case temperature TC

Vo+

RTN

FAL#

VFAL#

IFAL#

Input

11006c

47 22

05189c

60 70 80 90 100 110 °C

DEG#

[V]

signal DEG#

0.2

0.4

0.6

0.8

o max

thermal shutdown

Power Fail Signal

The power fail circuitry monitors the input voltage Vi and all

output voltages. The signal VFAL# changes from high to low

impedance (<0.5 V), when one of the monitored voltages

falls below the threshold. VFAL# changes back to high

impedance, when all monitored voltages exceed their

threshold level.

The threshold level for Vo corresponds to approx. 90% of

Vo nom.

The threshold levels for Vi correspond to approx. 34 V for

CPD models and 80 – 90 VAC for CPA models.

Note: CPD200/250 (and CPA200/250 up to version V116)

provide only the signal FAL#, but the converter is not

inhibited.

Note: Vi min of CPA models is considered as insuf ficient, when

Vi remains for typ. 30 ms below √–

2 • Vi min.

Connector pin 42 (signal VFAL#) is internally connected via

the drain-source path of a JFET (self-conducting type) to

the signal return pin 22. The current IFAL# should not

exceed 10 mA. VFAL# should not exceed 40 V, as the JFET is

not protected against overvoltage.

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 12 of 19 www.power-one.com

LEDs "Input OK" and "Fault" status versus input voltage.

Conditions: Po – Po max, TC – TC max , Vinh = open

LED "Fault" status versus output current.

Conditions: Vi min – Vi max, TC – TC max , Vinh= open

LED "Fault" status versus case temperature.

Conditions: Po – Po max, Vi min – Vi max, Vinh= open

LED "Fault" status versus Vinh.

Conditions: Po – Po max, Vi min – Vi max, TC – TC max

Input OK

C max

i inh

+50 V

+0.8 V +2.4 V

-2 V

inh threshold

LED off

If +12 V bus voltage is present, LED is on. LED on

LED Status undefined

06156a

i min

i max

Fault

Fig. 12

Display status of LEDs

Active Current Sharing for Vo1, Vo2, Vo3

The current share facility, consisting of a single-wire link,

should be used, where several converters are operated in

parallel connection, for example, high reliability n+1

redundant systems or systems providing higher output

power.

Note: Maximum six converters should be connected in

parallel.

Using this feature reduces the stress of the individual

converters and improves the reliablity of the system.

Interconnection of the current sharing terminals causes the

converters to share the output current evenly. In n+1

redundant systems a failure of a single converter will not

lead to a system failure, since the outputs are already

decoupled by FETs and diodes internally.

Passive Current Sharing for Vo4

The output voltage changes slightly with the output current

(droop characteristic) ensuring automatic current sharing

without further precautions, when several converters are

Fig. 11

Output voltage Vo4 versus output current Io4.

connected in parallel. An increase in output current

decreases the output voltage according to fig. 11.

LEDs

A green LED "Input OK" and a red LED "Fault" are

incorporated in the front panel.

+2%

–2%

0.01 0.5 1 Io/Io nom

Vo4 set

∆Vo

CPx200/250

05188c

–4%

CPx500/550

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 13 of 19 www.power-one.com

transients, which typically occur in most installations. The

converters have been successfully tested to the following

specifications:

Electromagnetic Comp atibility (EMC)

A metal oxide VDR together with the input fuse and a filter

form an effective protection against high input voltage

Electromagnetic Immunity

Table 8: Immunity type tests

Phenomenon Standard Level Coupling Value Waveform Source Test In Per-

mode 1 applied imped. procedure oper. form. 2

Electrostatic IEC/EN 4 contact discharge 8000 Vp1/50 ns 330 Ω10 positive and yes A

discharge 61000-4-2 air discharge 15000 Vp10 negative

(to case) discharges

Electromagnetic IEC/EN 3 antenna 10 V/m AM 80% n.a. 80 – 1000 MHz yes A

field 61000-4-3 1 kHz

10 V/m 50% duty cycle 900 ±5 MHz

200 Hz repeti-

tion frequency

Electrical fast IEC/EN 3 capacitive, o/c 1000 Vpbursts of 5/50 ns 50 Ω60 s positive yes A

transients/burst 61000-4-4 direct, i /c, +i/–i 2000 Vp2.5/5 kHz over 60 s negative

15 ms; burst transients per

period: 300 ms coupling mode

Surges IEC/EN 3 i /c 2000 Vp1.2/50 µs 12 Ω5 pos. and 5 neg. yes B

61000-4-5 2 +i/ –i 1000 Vp2 Ωsurges per

coupling mode

Conducted IEC/EN 3 i, o, signal wires 10 VAC AM 80% 150 Ω0.15 – 80 MHz yes A

disturbances 61000-4-6

( 140 dBµV)

1 kHz

1 i = input, o = output, c = case connected to PE

2 A = normal operation, no deviation from specifications, B = normal operation, temporary loss of funciton or deviation from specs

possible.

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 14 of 19 www.power-one.com

CPA250-con+p_a

EN 55022 B

CPA250 B30510100 /00239, Peak N, Conducted 0.15 - 30 MHz, Divina, 10-Jan-07

dBµV

EN 55022 A

0.2 0.5

1 2

5 10 20 MHz

Fig. 13c

Typical disturbance voltage (peak) at the line input

according to EN 55022, measured at Vi nom and Io nom

(CPA500-4530).

Electromagnetic Emission

Radiated and conducted emissions comply with EN 55011/

55022, class A. In addition, CPD500 and CPA500/550 meet

conducted emissions class B.

Fig. 13a

Typical disturbance voltage (peak) at the negative input

according to EN 55022, measured at Vi nom and Io nom

(CPD200-4530).

Fig. 14

Typical radiated electromagnetic field strength (quasi

peak) according to EN 55022, normalised to a distance of

10 m, measured at Vi nom and Io nom.

Fig. 13b

Typical disturbance voltage (peak) at the line input

according to EN 55022, measured at Vi nom and Io nom

(CPA250-4530).

100

150

250

300

[dBmV/m]

[MHz]

07122b

200

230

EN 55022 A

EN 55022 B

CPA500-con+p

CPA500-4530S211 V107 W0622, Vi=230VAC, Ponom, Peak, Phase, Uster, 20-Sep-07

dBµV

0.2 0.5 1

2 5 10 20 MHz

80 EN 55022 A

EN 55022 B

CPD200-con+p_a

CPD200, B738613, 50807-TU, Peak L, Conducted 0.15 - 30 MHz, Divina, 7-Mar-07

dBµV

0.2 0.5 1

2 5 10 20 MHz

80 EN 55022 A

EN 55022 B

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 15 of 19 www.power-one.com

Immunity to Environmental Conditions

Table 9: Mechanical and climatic stress (tests of CPD500 are in process)

Test method Standard Test conditions Status

Cab Damp heat IEC/EN 60068-2-78 T emperature: 40 ±2 °C Converter

steady state Relative humidity: 93 +2/-3 % not

Duration: 56 days operating

Ea Shock IEC/EN 60068-2-27 Acceleration amplitude: 20 gnConverter

(half-sinusoidal) Bump duration: 11 ms operating

Number of bumps: 18 (3 in each direction)

Eb Bump IEC/EN 60068-2-29 Acceleration amplitude: 15 gnConverter

(half-sinusoidal) Bump duration: 6 ms operating

Number of bumps: 6000 (1000 in each direction)

Fda Random vibration IEC/EN 60068-2-35 Acceleration spectral density: 0.05 g n2/Hz Converter

wide band, CPD200/250, CPA200/250 Frequency band: 20 – 500 Hz operating

reproducibility Acceleration magnitude: 4.9 gn rms

high Test duration: 3 h (1 h in each axis)

IEC/EN 60068-2-35 Acceleration spectral density: 0.01 g n2/Hz Converter

CPD500, CP A500/550 Frequency band: 20 – 500 Hz operating

Acceleration magnitude: 2.2 gn rms

Test duration: 1.5 h (0.5 h in each axis)

Drop test Converter in proper packing 0.75 m 3 directions Not

CPD200/2501 only operating

1Version V106 or higher

Reliability

Table 11: MTBF

Ratings at specified Model Ground Ground fixed Ground Unit

case temperature benign mobile

40 °C 40 °C 70 °C 50 °C

MTBF acc. to CPD250 288 000 59 000 33 000 27 000 h

MIL-HDBK-217F, notice 2 CPA250 279 000 57 000 31 000 33 000

CPD500

CPA500 195 000 35 000 17 000 16 000

Temperatures

Table 10: Temperature specifications, valid for an air pressure of 800 – 1200 hPa (800 – 1200 mbar)

Relative humidity3 [%] Temperature [°C ]

Characteristics Conditions min typ max min typ max

TAAmbient temperature Operational 1 595–25

4 50

TCCase temperature 2 595–25

4 105 2

TSStorage temperature Non operational 10 95 –40 85

1See Thermal Considerations

2Overtemperature shutdown at TC ≥105 °C

3Non condensing humidity

4CPx200/250 version V117 (or higher) and CPA500/550 version V110 (or higher) can be operated at –40 °C with increased output ripplel.

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 16 of 19 www.power-one.com

Mechanical Data

Dimensions in mm (inches)

Fig. 15

CPA200/250 and

CPD200/250.

Overall size: 162.5 x

128.7 x 40.6 mm.

Weight: 0.8 kg

European

Projection

Fig. 16

View of the

connector

Fig. 17

CPD500 and

CPA500/550.

Overall size: 223.4

x 162.5 x 40.6 mm.

Weight: 1.65 kg

40.34

(1.588")

261.9 (10.311")

233.35

( 9.187")

228.35

(8.99")

2.5

(0.098")

6.6

(0.260")

162.63 (6.403")

169.52 (6.674")

JM015a

Size:

6U x 8HP

pin 47

pin 1

12.88

(0.507")

AIRFLOW

Measuring point of the

case temperature TC

09135d

95 (3.74")

100 (3.937")

40.6 (1.60")

128.7 (5.067")

Size:

3U x 8HP

Measuring point of the

case temperature TC

2.5

(0.098") 162.63 (6.403")

169.52 (6.674")

12.88 (0.507")

6.6 (0.260")

pin 47

pin 1

AIRFLOW

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 17 of 19 www.power-one.com

Table 12: Pin allocation of the front connector

Pin1

L ength

Signal Description Pin1

Length

Signal Description

name name

1 – 4 B Vo1 Output 1 32 C n.c. Do not connect

5 – 12 B RTN Return (Vo1 and Vo2) 33 C Vo2SENSE Vo2 remote sense

13 – 18 B Vo2 Output 2 34 C SRTN Sense return

19 B RTN Return (Vo3) 35 C Vo1SHARE Vo1 current share

20 B Vo3 Output 3 36 C Vo3SENSE Vo3 remote sense

21 C Vo4 Output 4 37 C n.c. Do not connect

22 C RTN Return 38 C DEG# Degrade signal

23 C Reserved Reserved 39 C INH# Inhibit

24 C RTN Return (Vo4) 40 C n.c. Do not connect

25 C n.c. Do not connect 41 C Vo2SHARE Vo2 current share

26 C Reserved Reserved 42 C FAL# Fail signal

27 D EN# Enable 43 C n.c. Do not connect

28 C n.c. Do not connect 44 C Vo3SHARE Vo3 current share

29 C n.c. Do not connect 45 A

CGND Chassis ground

30 C Vo1SENSE Vo1 remote sense 46 A +DCIN4 ACN5Pos. DC input4 Neutral line5

31 C n.c. Do not connect 47 A – DCIN4 ACL5Neg. DC input4 Line input (phase)5

1Pin numbers shown are for the female backplane connector

2A = very long pins, B = long pins, C = short pins, D = very short pins.

3Pin 45 of the female connector is leading, ensuring that chassis ground makes contact first.

4CPD models (DC input)

5CPA models (AC input )

Safety and Installation Instructions

Connector Pin Allocation

The connector pin allocation table defines the electrical

potentials and the physical pin positions on the Positronic

connector. Pin no. 45 (protective earth) is a leading pin,

ensuring that it makes contact with the female connector

first.

Installation Instructions

These converters are components, intended exclusively for

installation within other equipment by an industrial

assembly process or by a professionally, competent

person. Installation must strictly follow the national safety

regulations in respect of the enclosure, mounting, creepage

distances, clearance, casualty markings, and segregation

requirements of the end-use application.

Connection to the system shall be made via the mating

female connector (see fig. 16). Other installation methods

may not meet the safety requirements. Check for hazardous

voltage, before altering any connections.

The converters are provided with a leading pin no. 45, which

is reliably connected to the case. For safety reasons it is

essential to connect this pin to the protective earth of the

supply system.

The input –DCIN or ACL (pin no. 47) is internally fused; see

Input Fuse and Protection. This fuse is designed to break an

overcurrent in case of a malfunction of the converter and is

not customer-accessible.

External fuses in the wiring to one or both input lines (pin 47

and/or pin 46) may be necessary to ensure compliance with

local requirements. A built-in second fuse in the neutral line

(pin 47) is available as option F for CPA500 models.

A second fuse in the wiring to the neutral line or option F may

be needed if:

• Local requirements demand an individual fuse in each

source line

• Neutral and earth impedance is high or undefined

• Phase and neutral of the mains are not defined or cannot

be assigned to the corresponding terminals.

Caution:

Installation must strictly follow the national safety regulations.

Models with option F: Caution! Double-pole/neutral fusing.

Do not open the converters, or the warranty will be

invalidated!

Important: If the inhibit function is not used, pin 39 (i) should

be left open-circuit to enable the outputs. Enable Pin 27 (EN#)

should be connected to pin 22 (RTN) to enable the outputs.

Fig. 18

Pinout of the front connector

10087a

2468 101214161820

135791113 15 17 19

45 47

23 26 29 32 35 38 41 44

22 25 28 31 34 37 40 43

21 24 27 30 33 36 39 42

Connector: Positronic PCIH47M400A1 or similar

Mating female connector: Positroni c PCIH47F300A1 or similar

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 18 of 19 www.power-one.com

Make sure that there is sufficient airflow available for

convection cooling. This should be verified by measuring

the case temperature, when the converter is installed and

operated in the end-use application. The maximum

specified case temperature TC max should not be exceeded.

Make sure that a converter failure (e.g., by an internal short-

circuit) does not result in a hazardous condition.

Standards and Approvals

All converters are safety-approved to IEC/EN 60950-1 2nd Ed.

and UL/CSA 60950-1 2nd Ed.

The converters correspond to Class I equipment. The

following considerations have been made during design

concerning safety:

• Build-in component

• Functional insulation between output(s) and case

• Use in a pollution degree 2 environment.

• CPD-models: Basic insulation between input and case/

output, based upon 75 VDC. The input is identified as

TNV-2.

• CPA-models: Basic insulation between input and case,

and double or reinforced insulation between input and

output, based on 250 VAC.

The converters are subject to manufacturing surveillance in

accordance with the above mentioned UL standards.

Cleaning Agents

The power supplies are not hermetically sealed. In order to

avoid possible damage, any penetration of cleaning and

other fluids shall be avoided.

Protection Degree

The converters correspond to protection degree IP 20,

provided that the female connector is fitted.

Isolation

The electric strength test is performed as factory test in

accordance with EN 50116 and EN/IEC 60950; see

table13. Only the test between input and [case+outputs],

marked with footnotes 1 and 2, may be repeated by the

customer.

Note: The DC test voltage shall be slowley increased (within

several seconds) and maintained for max. 2 seconds. Trigger

level 25 µA. Power-One is executing these factory tests with a

reasonable margin, to guarantee its repetition.

Test with AC is not possible due to the incorporated Y caps.

However , the standards allow testing with a corresponding DC

voltage.

Power-One will not honor any warranty claims, if the

customer provides other or incorrect electric strength tests.

Safety of Operator-Accessible Output Circuits

If the output circuit of a converter is operator-accessible, it

shall be an SELV circuit according to the IEC/EN 60950

related safety standards.

However , it is the sole responsibility of the installer to ensure

the compliance with the relevant and applicable local safety

regulations

Table 13: Isolation

CPD models C PA models Unit

Characteristic Input to Output to Input to Output to

(case + output) case (case + output) case

Electric Actual factory test ≥1 s 15001700 2200 2700 VDC

strength AC test voltage equivalent 10 00 50 0 1 500 500 VAC

test to factory test

Insulation resistance at 500 VDC >300 >300 >300 >300 MΩ

1 According to IEC/EN 60950, subassemblies connecting input to output are pre-tested with ≥3 kVDC.

2 According to IEC/EN 60950, subassemblies connecting input to output are pre-tested with ≥4.3 kVDC or 3 kVAC.

CPA, CPD Series Data Sheet

200 – 550 Watt CompactPCI® AC-DC and DC-DC Converters

BCD20005-G Rev. AF, 18-Aug-10 Page 19 of 19 www.power-one.com

NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical

components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written

consent of the respective divisional president of Power-One, Inc.

TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending

on the date manufactured. Specifications are subject to change without notice.

Options

L: Output Current Latch

All CPA/CPD models exhibit a latching shutdown, which is

activated if only one output voltage is too high; see Output

Characteristic and Protection.

If option L is fitted, this latch is as well activated, if the

current limit of one output is exceeded for approx. 0.5 s.

C: Protective Lacquer

All boards are covered by a protective lacquer.

F: Built-in Second Fuse

Available for CPA500 models only. A 2nd fuse in the neutral

input line provides safe phase to phase connection at low

mains voltages (e.g., USA 120/208 V /60 Hz systems).

The built-in second fuse enables safe connection to the

mains, where phase and neutral line are not defined, as

e.g., in the case of plug and socket connection to the mains

via German Schuko-plugs; see also Safety and Installation

Instructions.

G: RoHS

RoHS-compliant for all six substances (standard for

CPD500).