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
Features and Benefits
■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
High Power Switching DC Power Supplies
Models 1900, 1901 & 1902
Data Sheet
www.bk precision.com
Technical data subject to change
© B&K Precision Corp. 2014
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.
Outputs/Model 1900 1901 1902
Variable Output Voltage 1 - 16 V 1 - 32 V 1 - 60 V
Variable Output Current 0 - 60 A 0 - 30 A 0 - 15 A
Full-Featured DC Power Supplies to
Meet Your High Power Needs
Rear Panel
High Power Switching DC Power Supplies
Models 1900, 1901 & 1902
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.
Fully Protected
Custom Presets
Flexibility & PerformanceDesigned to Make Your
Work Easier
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
Main output
terminal Recall preset switch
Analog remote
control terminal
Mode selection
switch
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.
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.
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.
Cooling fan
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High Power Switching DC Power Supplies
Models 1900, 1901 & 1902
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Specifications
Mode ls 1900 1901 1902
Output
Variable Output Voltage 1 – 16 V 1 – 32 V 1 – 60 V
Variable Output Current 0 – 60 A 0 – 30 A 0 – 15 A
Auxiliary Output Current 5 A
Voltage Regulat ion
Load (0-100% Load) ≤ 50 mV
Line (90-132 VAC, 170-264 VAC Variation) ≤ 20 mV
Current Regulation
Load (10-90% Rated Voltage) ≤ 200 mA ≤ 150 mA ≤ 100 mA
Line (90-132 VAC, 170-264 VAC Variation) ≤ 50 mA
Ripple & Noise
Ripple & Noise Voltage (rms) ≤ 5 mV
Ripple & Noise Voltage (peak-peak) ≤ 50 mV ≤ 50 mV ≤ 100 mV
Current Ripple & Noise (rms) ≤ 100 mA ≤ 50 mA (110 VAC)
≤ 40 mA (230 VAC) ≤ 15 mA
Meter Type & Accuracy
Voltage Meter 3-Digit LED Display ± 0.2% + 3 counts
Current Meter 3-Digit LED Display ± 0.2% + 3 counts
Other
AC Input 100 - 120 VAC 60 Hz, 220 - 240 VAC 50 Hz*
Full Load Input Current 9.4 A (110 VAC)
4.7 A (230 VAC)
9.0 A (110 VAC)
4.5 A (230 VAC)
9.3 A (110 VAC)
4.5 A (230 VAC)
Efficiency 84% (110 VAC)
85% (230 VAC)
87% (110 VAC)
86% (230 VAC)
87% (110 VAC)
88% (230 VAC)
Switching Frequency 65 – 85 kHz 75 – 95 kHz 65 – 85 kHz
Tracking Overvoltage Protections O/P 1-5 V: set voltage +2 V
O/P 5-16 V: set voltage +3 V
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
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
Transient Response Time (50-100% Load) 1.5 ms
Power Factor Correction > 0.95 at optimal load
Cooling Method Thermostatically controlled fan from zero to full speed
Protections Overload, Short Circuit by Constant Current, Overvoltage, Overtemperature
Special Features 3 User-Defined Voltage and Current Presets, Analog Remote Control, Remote Sense (model 1900 only)
Operating Temperature 32 °F to 104 °F (0 °C to 40 °C), ≤80% R.H.
Storage Temperature 5 ºF to 158 ºF (-15 ºC to 70 ºC), ≤85% R.H.
Dimensions (W x H x D) 7.9” x 3.5” x 10.8” (200 x 90 x 275 mm)
Weight 7 lbs (3.2 kg)
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.
