Data Sheet
Single Output Programmable DC Power Supplies
Models 9120A, 9121A, 9122A, 9123A & 9124
B&K Precision
®
models 9120A, 9121A,
9122A, 9123A and 9124 are laboratory grade
Programmable DC Power Supplies providing
great performance and features not found in
other supplies in this price category. The 9120
series are designed to meet the needs of today’s
applications in R&D design verification,
production testing or university labs that require
clean and reliable power, high resolution and
accuracy and fast transient response time.
Excellent display resolution
I
Low ripple and low noise
I
Outstanding temperature stability
I
Fast transient response time (<150 µs)
I
SCPI compatible
I
Front and Rear Output Terminals
I
Closed case calibration
I
Compact size for bench use or rack
mountable (2U x 1/2U size)
I
List mode operation for increased
throughput. Download and execute
command sequences from non-volatile
memory
I
Front Panel Operation
The numeric keys and rotary knob provide a
convenient interface for setting output levels
quickly and precisely. Voltage and Current can
be set to a maximum resolution of 0.5mV (2mV
for 9124) and 0.1mA respectively. Up to 50
parameters can be stored and recalled from
internal memory.
9124
Mo dels
Output Voltage
Output Current
9 12 0A
0-32V
0-3A
912 1A
0-20V
0-5A
91 22A
0-60V
0-2.5A
91 23 A
0-30V
0-5A
9 12 4
0-72V
0-1.2A
High resolution display
Encoder knob for quick
analog style control
Numeric keys for direct entry of
voltage and current values
Output ON/OFF
switch
4mm sheathed
safety banana jacks
Technical data subject to change
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Single Output Programmable DC Power Supplies
Models 9120A, 9121A, 9122A, 9123A & 9124
Remote Interface
The power supplies can be remotely controlled
from any PC with USB or RS232 interface,
allowing the user to program and monitor all
parameters through easy to use SCPI commands.
The power supplies come with a RS232 to TTL
serial converter cable and a USB to TTL serial
converter cable. Additionally, model 9123A can
be controlled via GPIB interface and includes a
GPIB to TTL conversion adapter cable.
Specifications
9120A
Output Ratings
( 0 °C~40 °C)
Load Regulation
±(%of output+offset)
Line Regulation
±(%of output+offset)
Programming resolution
Readback/ Meter resolution
Front panel
setting resolution
Programming accuracy,
12months (25 °C ± 5 °C)
±(%of output+offset)
Readback/ Meter accuracy
12months (25 °C ± 5 °C)
±(%of output+offset)
Ripple & Noise
(20Hz ~20MHz)
Temperature coefficient,
(0 °C~40 °C)
±(% of output+offset)
Readback temperature
coefficient,
±(% of output+offset)
Transient Response
DVM Accuracy
DVM Resolution
Milliohm Meter Accuracy
State Storage Memory
Operating Temperature
Storage Temperature
AC Input
Weight
Dimensions
9121A
9122A
0 ~60V
0~2.5A
<0.01%+2mV
<0.05%+0.5mA
<0.01%+2mV
≤
0.05%+0.05mA
1mV
0.1mA
0.5mV
0.05mA
1mV
0.1mA
≤
0.03%+6mV
≤
0.05%+1.5mA
≤
0.02%+6mV
≤
0.05%+1.5mA
≤
5mVp-p
≤
3mArms
≤
0.02%+6mV
<0.05%+1mA
≤
0.02%+6mV
≤
0.05%+1mA
9123A
0 ~30V
0~5A
<0.01%+2mV
<0.05%+1.5mA
<0.01%+1mV
≤
0.05%+0.1mA
0.5mV
0.1mA
0.1mV
0.05mA
0.5mV
0.1mA
≤
0.03%+3mV
≤
0.05%+2.5mA
≤
0.02%+2.5mV
≤
0.05%+2.5mA
≤
4mVp-p
≤
4mArms
≤
0.02%+3mV
<0.05%+2mA
≤
0.02%+3mV
≤
0.05%+2mA
models
9124
0~72V
0~1.2A
<0.01%+2mV
<0.05%+0.3mA
<0.01%+1mV
≤
0.05%+0.05mA
2mV
0.02mA
0.5mV
0.01mA
2mV
0.02mA
≤
0.03%+6mV
≤
0.05%+1mA
≤
0.02%+5mV
≤
0.05%+1mA
≤
5mVp-p
≤
3mArms
≤
0.02%+5mV
<0.05%+0.5mA
≤
0.02%+5mV
≤
0.05%+0.5mA
0 ~32V
0 ~20V
0~3A
0~5A
<0.01%+2mV
<0.05%+1mA
<0.01%+1mV
<0.05%+0.1mA
0.5mV
0.1mA
0.1mV
0.1mV
0.01mA
0.05mA
0.5mV
0.1mA
<0.03%+3mV
<0.05%+2mA
<0.02%+3mV
<0.05%+2mA
≤
4mVp-p
≤
3mVp-p
≤
3mArms
≤
3mArms
<0.02%+3mV
<0.05%+2mA
<0.02%+3mV
<0.05%+2mA
Extra Features
The 9120 series’ digital port offers a variety of
configurations. The port can operate in Digital I/O,
external Trigger and DFI/RI (Discrete Fault
Indicator/Remote Inhibit) mode. The RI feature can
be used for turning several power supplies On/Off
simultaneously. External triggering can be used in
combination with List mode.
The included Application Software supports front
panel emulation and allows users to generate
simple test sequences without the need to write
source code.
Additionally, the power supply comes with a built-in
51/2 digit DVM and high resolution milliohm meter
supporting 4 wire measurements.
< 150 µs for output to recover to within 75 mV following a change from 100 mA to 1 A
0~12V range: 0.02%+2mV
0~40V range: 0.02%+3mV
0~12V range: 0.1mV
0~40V range: 1mV
0.1% (for Voltage and Current
≥
10% of full scale)
0.3% (for Voltage and Current
≥
3% of full scale)
50 user configurable memory locations
0 to 40 °C, <75% R.H.
-20 to 70 °C, <85% R.H
115V/220VAC ± 10%, 47 to 63Hz
19.8 lbs, (9 kg)
21.2 lbs, (9.6 kg)
19.8 lbs, (9 kg)
8.45in(W) x 3.8in(H) x 13.9in(D)
214.5mm(W) x 88.2mm (H) x 354.6mm (D)
Three-Year Warranty
Included Accessories: User manual, power line cord, IT-E131 RS232 to TTL serial converter cable, IT-E132 USB to TTL serial converter
cable, software installation disk, and certificate of calibration. Model 9123A also includes IT-E135 GPIB to TTL conversion adapter cable.
Optional: IT-E151 rack mount kit.
Temperature controlled
cooling fan
DVM and mΩ
meter
User accessible fuse
The 9120 series uses 4mm sheathed banana
jacks that accept sheathed or shrouded banana
plugs and meet the latest international safety
standards.
Remote Sense and digital
port functionality
Serial interface connector for RS232 or
USB communication.
Model 9123A also supports control via
GPIB interface.
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