Triple Output Programmable DC Power Supply
Model 9129B
Data Sheet
www.bkprecision.com
Technical data subject to change
© B&K Precision Corp. 2015
The 9129B is an economical triple output linear
programmable DC power supply featuring
isolated outputs that can be adjusted
independently or combined in series or parallel
to output higher voltage or current. Additionally,
this supply can operate in tracking mode with
user-configurable ratios between channels.
The front panel keys and rotary knob with
convenient cursors let users quickly set voltage
and current values. Up to 27 different instrument
settings can be saved and recalled. The power-on
state of the outputs can also be configured.
Features
■Three independent and electrically isolated
outputs
■Displays voltage and current settings for all
three channels simultaneously
■Low noise, linear regulation
■Series and parallel modes combine channels to
increase the output voltage or current
■Tracking mode allows users to set up channels
to maintain a programmed ratio
■Fully programmable channels with output
On/Off control
■Store and recall up to 27 instrument settings
■Communicate via USB interface supporting
SCPI commands using the included USB to
TTL serial adapter
■Softpanel for remote control, test sequence
generation, and datalogging available
■Overvoltage (OVP) and overtemperature (OTP)
protection including keylock function
■Compact 19” half-rack form factor allows for
side-by-side rack mounting of two units
Output Rating
Voltage 0 - 30 V (CH1 & CH2)
0 - 5 V (CH3)
Current 0-3 A (CH1, CH2 & CH3)
The USB to TTL interface supporting SCPI
commands can be used to remotely control the
power supply via a PC. Alternatively, users can
control the 9129B, execute test sequences or
log measurements using the provided PC
software application. This software also
integrates with Data Dashboard for LabVIEW
apps enabling iOS, Android, or Windows 8
compatible tablets or smartphones to remotely
monitor select measurement indicators.
This power supply is suitable for a wide range of
applications including education, service and
electronic design.
www.bkprecision.com
Triple Output Programmable DC Power Supply
Model 9129B
2
Bright vacuum fluorescent display indicates
voltage and current for each output simultaneously
Front panel
Rear panel
Rotary knob
Thermostatically controlled cooling fan
TTL interface Line voltage
selector
AC line input
Numeric keypad for direct entry
of voltage and current values
Function keys Cursor keys CH1, CH2, and CH3 Outputs
Fuse box
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Triple Output Programmable DC Power Supply
Model 9129B
3
Flexible operation
Combined series mode
Channels 1 and 2 can be wired in series to
increase the voltage. Selecting series combined
mode provides convenient metering of the
channels connected in series.
PC software is provided for front panel emulation, generating and executing test sequences or logging
measurement data without the need to write source code.
■ Remote monitoring on iOS, Android, or Windows 8 compatible tablets or smartphones via NI Data
Dashboard for LabVIEW apps.
■ Log voltage, current, and power values of each channel as well as timestamp, CV/CC mode, and output
status.
■ Quickly develop a custom dashboard with indicators, charts, or gauges to monitor your power supply.
■ Create an unlimited number of external list files to be executed from PC memory. Save and recall list
files to/from the PC.
Channels 1 and 2 can be wired in parallel to
increase the current. Selecting parallel combined
mode provides convenient metering of the
channels connected in parallel.
Tracking mode
Tracking mode can be used to simplify
adjustments across multiple channels by
maintaining a user-defined ratio between outputs.
Tracking mode can be set on channels 1 and 2.
Combined parallel mode
Bipolar output configuration
+VDC
OVDC
+
Channel 2
Channel 1
-VDC
Application software
30.00V PA rA 5.00V
6.000A 3.000A
This feature is useful for powering bipolar
circuits and devices.
The independent and isolated outputs can be
used to create positive and negative outputs
between channels 1 and 2.
30.00V 30.00V 5.00V
3.000A 3.000A 3.000A
60.00V SE r 5.00V
3.000A 3.000A
www.bkprecision.com
Triple Output Programmable DC Power Supply
Model 9129B
4
Specifications
v091715
Model 9129B
Output Rating
Voltage 0–30 V (CH1 & CH2), 0-5 V (CH3)
Current 0-3 A (all channels)
Power 195 W
Load Regulation
Voltage ≤ 0.02 % + 4 mV
Current ≤ 0.2 % + 3 mA
Line Regulation
Voltage ≤ 0.02 % + 4 mV
Current ≤ 0.2 % +3 mA
Ripple & Noise
Voltage ≤ 5 mVp-p / ≤1 mVrms
Current ≤ 6 mArms
Programming Resolution
Voltage 10 mV
Current 1 mA
Readback Resolution
Voltage 10 mV
Current 1 mA
Programming Accuracy ± (% output + offset)
Voltage ≤ 0.06 % + 20 mV
Current ≤ 0.2 % + 10 mA
Readback Accuracy ± (% output + offset)
Voltage ≤ 0.06 % + 20 mV
Current ≤ 0.2 % + 10 mA
Series Accuracy (combined mode)
Voltage ≤ 0.5 % + 30 mV
Current ≤ 0.2 % + 15 mA
Parallel Accuracy (combined mode)
Voltage ≤ 0.2 % + 30 mV
Current ≤ 0.2 % + 25 mA
General
Memory 3 memory groups with 9 locations in each group
Remote Interface USB (Virtual COM via included USB to TTL serial adapter)
AC Input 110/220 VAC (+/- 10 %), 47 Hz - 63 Hz
Operating Temperature 32 °F to 104 °F (0 °C to 40 °C), relative humidity up to 80%
Storage Temperature -4 °F to 158 °F (-20 °C to 70 °C)
Dimensions (W x H x D) 8.45" x 3.47" x 13.96" (214.5 x 88.2 x 354.6 mm)
Weight 16.05 lbs. (7.3 kg)
Three-Year Warranty
Standard Accessories Power cord, IT-E132B (USB to TTL serial adapter plus USB cable),
test report, and certificate of calibration
Optional Accessories IT-E151 rack mount kit
Note: All specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 23 °C ± 5 °C.
