Instruction manual

5
2 Introduction
B&K Precision models 1693 and 1694 switching mode DC power supplies provide
high current output in a lightweight and compact package. It is suitable for a variety
of uses, especially for powering DC operated mobile radio equipment on the bench.
These 900W power supplies provide a variable voltage output from 1 V to 15 V at 60
A (model 1693) or from 1 V to 30 V at 30 A (model 1694). In addition, a remote
sensing terminal is available for use to compensate for voltage drops due to
resistances from load leads. The output voltage level can also be externally controlled
via an analog remote control terminal. Switching mode power supplies have the
advantage of being lightweight and high in efficiency when compared to traditional
linear mode power supplies. The efficiency can exceed 85% under optimal conditions.
Bright 3-digit LED displays give an accurate and highly readable indication of settings.
Features
• Up to 60 A output current
• Lightweight and compact
• Dual 3-digit LED displays
• Remote sense terminal
• Analog remote control via external voltage source or variable resistor
• Current foldback circuitry with illuminated indicator prevents overloading
the power supply
• Overtemperature protection circuitry
• Overvoltage protection
• Front panel auxiliary output