Data Sheet
Switching DC Power Supplies
1900B Series
Full-Featured DC Power Supplies to
Meet Your High Power Needs
B&K Precision models 1900B, 1901B, and 1902B
are laboratory grade switching DC power
supplies with high current output in a small,
lightweight form factor. The 1900B Series provide
various configurations of high output voltage or
high output current and feature rotary encoder
control knobs, which make setting voltage and
current fast and precise. Its dual action push
button allows the user to set both coarse and
fine, voltage and current levels.
In addition to constant voltage (CV) and
constant current (CC) modes, these high
efficiency DC power supplies offer preset and
remote control modes. Save up to three different
presets of voltage and current values for quick
recall. The analog remote control function allows
the output power, voltage, and current to be
adjusted without touching the front panel of the
power supply. A remote sensing terminal (model
1900B only) is also available to compensate for
voltage drop across load leads.
These features make the 1900B, 1901B, and
1902B suitable for a wide range of applications
requiring high current including production
testing, telecommunications, R&D, service, and
university labs.
Features and Benefits
n
Automatic
CV (constant voltage)/CC
(constant current) crossover operation
n
Up
to 60 A output current
and compact
encoder control for precise voltage and
n
Lightweight
n
Rotary
current setting
n
Save
up to 3 user-defined voltage and current
remote control function
sensing terminal (model 1900B only)
overtemperature, and
presets for quick recall
n
Analog
n
USB
interface
n
Remote
n
Overvoltage,
overload protection
n
Flexible
operating modes: Front panel
Model
Variable Output Voltage
Variable Output Current
1900B
1 - 16 V
0 - 60 A
1901B
1 - 32 V
0 - 30 A
1902B
1 - 60 V
0 - 15 A
(normal), Preset, or Remote Control
n
Front
panel 5 amp auxiliary output
Technical data subject to change
© B&K Precision Corp. 2016
www.bkprecision.com
Switching DC Power Supplies
1900B Series
Designed to Make Your
Work Easier
Flexibility & Performance
Fully Protected
Have peace of mind knowing that these power
supplies come with built-in OVP (overvoltage
protection), OTP (overtemperature protection),
and OLP (overload protection) circuitry. These
protections help prevent serious damage to
equipment in case of power supply failure.
Custom Presets
Quickly use common voltage and current settings
with a flip of the Recall preset switch. Up to three
different presets can be set and recalled.
LED indicators for
constant voltage and
constant current modes
Rotary encoder knobs for
quick and precise setting of
voltage and current
Bright, dual LED displays
Rear Control Indicator
Auxiliary output terminal
Analog Remote Control Capability
Use the included connector to wire up to an
external variable DC voltage source or variable
resistor to remotely control the power supply’s
output voltage and current or to turn the
output on/off.
Rear Panel
Main output Recall preset
terminal
switch
Cooling fan
PC Connectivity
Control your instrument through remote
control PC software or use programming
commands to communicate with your
instrument.
USB
interface
Analog remote
control terminal
Remote sense
(Model 1900B only)
Mode selection
switch
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Switching DC Power Supplies
1900B Series
Specifications
Models
Output
1900B
1 – 16 V
0 – 60 A
960 W
1901B
1 – 32 V
0 – 30 A
5A
960 W
≤
50 mV
≤
20 mV
1902B
1 – 60 V
0 – 15 A
900 W
Variable Output Voltage
Variable Output Current
Auxiliary Output Current
Maximum Output Power
Voltage Regulation
Load (0-100% Load)
Line (90-132 VAC, 170-264 VAC Variation)
Current Regulation
Load (10-90% Rated Voltage)
Line (90-132 VAC, 170-264 VAC Variation)
Ripple & Noise
≤
200 mA
≤
150 mA
≤
50 mA
≤
5 mV
≤
100 mA
Ripple & Noise Voltage (rms)
Ripple & Noise Voltage (peak-peak)
Current Ripple & Noise (rms)
Meter Type & Accuracy
≤
50 mV
≤
100 mA
≤
50 mV
≤
50 mA (110 VAC)
≤
40 mA (230 VAC)
3-Digit LED Display ± 0.2% + 3 counts
3-Digit LED Display ± 0.2% + 3 counts
100 - 120 VAC 60 Hz, 220 - 240 VAC 50 Hz*
≤
100 mV
≤
15 mA
Voltage Meter
Current Meter
Other
AC Input
Full Load Input Current
Efficiency
Switching Frequency
Tracking Overvoltage Protections
Transient Response Time (50-100% Load)
Power Factor Correction
Cooling Method
Protections
Special Features
Operating Temperature
Storage Temperature
Dimensions (W x H x D)
Weight
Included Accessories
9.4 A (110 VAC)
4.7 A (230 VAC)
84% (110 VAC)
85% (230 VAC)
65 – 85 kHz
O/P 1-5 V: set voltage +2 V
O/P 5-16 V: set voltage +3 V
9.0 A (110 VAC)
4.5 A (230 VAC
87% (110 VAC)
86% (230 VAC)
75 – 95 kHz
O/P 1-5 V: set voltage +2 V
O/P 5-20 V: set voltage +3 V
O/P 20-32 V: set voltage +4 V
1.5 ms
> 0.95 at optimal load
Thermostatically controlled fan from zero to full speed
9.3 A (110 VAC)
4.5 A (230 VAC
87% (110 VAC)
88% (230 VAC)
65 – 85 kHz
O/P 1-5 V: set voltage +2 V
O/P 5-20 V: set voltage +3 V
O/P 20-60 V: set voltage +4 V
Overload, Short Circuit by Constant Current, Overvoltage, Overtemperature
3 User-Defined Voltage and Current Presets, Analog Remote Control, Remote Sense (model 1900B only)
32 °F to 104 °F (0 °C to 40 °C),
≤80%
R.H.
5 ºF to 158 ºF (-15 ºC to 70 ºC),
≤85%
R.H.
7.9” x 3.5” x 10.8” (200 x 90 x 275 mm)
7 lbs (3.2 kg)
Two-Year Warranty
Power cord, instruction manual, USB cable, remote control connector
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.
*Special order instructions: For 230 V version, request model 1900B-220 V, 1901B-220 V, or 1902B-220 V.
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