Data Sheet
High Power Switching DC Power Supplies
Models 1900, 1901 & 1902
Full-Featured DC Power Supplies to
Meet Your High Power Needs
B&K Precision models 1900, 1901, and 1902
are laboratory grade switching DC power
supplies with high current output in a small,
lightweight form factor. The 1900 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, the high efficiency
DC power supply offers a unique solution with
its 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 1900 only) is
also available to compensate for voltage drop
across load leads.
These features make the 1900, 1901, and 1902
suitable for a wide range of applications requiring
high current including production testing,
telecommunications, R&D, service, and
university labs.
Features and Benefits
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Automatic CV (Constant Voltage)/CC
(Constant Current) crossover operation
Up to 60 A output current
Lightweight and compact
Rotary encoder control for precise voltage and
current setting
Save up to 3 user-defined voltage and current
presets for quick recall
Analog remote control function
Remote sensing terminal (model 1900 only)
Overvoltage, overtemperature, and overload
protection
Flexible operating modes: Front panel
(normal), Preset, or Remote Control
Front panel 5 amp auxiliary output
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Outputs/Model
Variable Output Voltage
Variable Output Current
1900
1 - 16 V
0 - 60 A
1901
1 - 32 V
0 - 30 A
1902
1 - 60 V
0 - 15 A
Technical data subject to change
© B&K Precision Corp. 2014
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High Power Switching DC Power Supplies
Models 1900, 1901 & 1902
Designed to Make Your
Work Easier
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.
Flexibility & Performance
Bright, dual LED displays
LED indicators for
constant voltage and
constant current modes
Rotary encoder knobs for
quick and precise setting
of voltage and current
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
terminal
Recall preset switch
Mode selection
switch
Cooling fan
Remote Sense (Model 1900 only)
Improve regulation of the power supply’s
output voltage at the load by using the
remote sense terminals to compensate for
voltage drop across load leads.
Analog remote
control terminal
High Power Switching DC Power Supplies
Models 1900, 1901 & 1902
Specifications
Mode ls
Output
Variable Output Voltage
Variable Output Current
Auxiliary Output Current
Vo ltage Reg ul at ion
Load (0-100% Load)
Line (90-132 VAC, 170-264 VAC Variation)
Current Re gul at ion
Load (10-90% Rated Voltage)
Line (90-132 VAC, 170-264 VAC Variation)
Ripple & Noise
Ripple & Noise Voltage (rms)
Ripple & Noise Voltage (peak-peak)
Current Ripple & Noise (rms)
M ete r Type & Accuracy
Voltage Meter
Current Meter
Oth er
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
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
100 - 120 VAC 60 Hz, 220 - 240 VAC 50 Hz*
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
Overload, Short Circuit by Constant Current, Overvoltage, Overtemperature
3 User-Defined Voltage and Current Presets, Analog Remote Control, Remote Sense (model 1900 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)
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
3-Digit LED Display ± 0.2% + 3 counts
3-Digit LED Display ± 0.2% + 3 counts
≤
50 mV
≤
100 mA
≤
5 mV
≤
50 mV
≤
50 mA (110 VAC)
≤
40 mA (230 VAC)
≤
100 mV
≤
15 mA
≤
200 mA
≤
150 mA
≤
50 mA
≤
100 mA
≤
50 mV
≤
20 mV
1 – 16 V
0 – 60 A
1 – 32 V
0 – 30 A
5A
1 – 60 V
0 – 15 A
1900
1901
1902
Two-Year Warranty
Included Accessories
Power cord, instruction manual, 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 1900-220 V, 1901-220 V, or 1902-220 V.
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