Data Sheet Switching DC Power Supplies Models 1685B, 1687B & 1688B Features and Benefits B&K Precision models 1685B, 1687B, and 1688B are laboratory grade switching mode DC power supplies with high current output in a small, lightweight form factor. These power supplies provide various configurations of output voltage and current, and feature rotary encoder control knobs, which make setting voltage and current levels fast and precise. Its dual action push button allows the user to easily set both coarse and fine, voltage and current levels. control modes. Save up to three different presets of voltage and current values for quick recall. For remote control, an analog remote control terminal is accessible on the rear, or use the USB interface to communicate with the power supply via PC software or remote commands. Automatic CV/CC crossover operation 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 These features make the 1685B Series suitable for a wide range of applications including production testing, telecommunications, R&D, electronic field service, and university labs. In addition to its constant voltage (CV) and constant current (CC) modes, these high efficiency DC power supplies offer preset and remote PC software for remote control and external timed programming Analog remote control function USB interface Front panel auxiliary output Overvoltage, overtemperature, and overload protection Outputs / Model 1685B 1687B 1688B Variable Output Voltage 1 - 60 V 1 - 36 V 1 - 18 V Variable Output Current 0-5A 0 - 10 A 0 - 20 A Technical data subject to change (c) B&K Precision Corp. 2012 w w w.bk prec ision.c om Switching DC Power Supplies Models 1685B, 1687B & 1688B 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 Front Panel 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 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. Rear control indicator 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. Auxiliary output terminal Rear Panel Main output terminal Recall preset switch Mode selection switch Cooling fan PC Connectivity Control your instrument through remote control PC software or use programming commands to communicate with your instrument. 2 USB device port Analog remote control terminal w w w.bk prec ision.c om Switching DC Power Supplies Models 1685B, 1687B & 1688B Specifications Model s 16 85 B 16 87B 1 68 8B Variable Output Voltage 1 - 60 V 1 - 36 V 1 - 18 V Variable Output Current Vol tage Regulatio n 0-5A 0 - 10 A 0 - 20 A Out put 50 mV Load (0-100% Load) 20 mV Line (90-132 VAC, 170-264 VAC Variation) Curren t Regulati on 100 mA Load (10-90% Rated Voltage) 50 mA Line (90-132 VAC, 170-264 VAC Variation) Ri ppl e & Noi se Ripple & Noise Voltage (rms) 5 mV Ripple & Noise Voltage (peak-peak) 50 mV 30 mA Current Ripple & Noise (rms) Me ter Type & Accuracy Voltage Meter 3-Digit LED Display 0.2% + 3 counts Current Meter 3-Digit LED Display 0.2% + 3 counts Othe r Input Voltage Full Load Input Current Efficiency 3.7 A (100 VAC) 1.7 A (230 VAC) 82% (100 VAC) 86% (230 VAC) 100-240 VAC 50/60 Hz 4.6 A (100 VAC) 2.1 A (230 VAC) 82% (100 VAC) 86% (230 VAC) 100 - 120 kHz 4.6 A (100 VAC) 2.1 A (230 VAC) 81% (100 VAC) 85% (230 VAC) 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 O/P 1-5 V: set voltage +2 V O/P 5-20 V: set voltage +3 V O/P 20-36 V: set voltage +4 V O/P 1-5 V: set voltage +2 V O/P 5-18 V: set voltage +3 V Switching Frequency Tracking Overvoltage Protections 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, Overvoltage, Overtemperature Special Features 3 User-Defined Voltage and Current Presets, Analog Remote Control External Timed Programming Max. 20 voltage and current steps Max. 99 min + 59 sec step time Max. 999 running cycles Gen eral Operating Temperature 32 F to 104 F (0 C to 40 C) 80% R.H. Storage Temperature 5 F to 158 F (-15 C to 70 C) 85% R.H. Dimensions (WxHxD) 7.9" x 3.5" x 8.2" (200 x 90 x 208 mm) Weight 5.2 lbs (2.4 kg) Two Year Warranty Supplied accessories 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. 3 v080619 w w w.bk prec ision.c om