Product DescriptionThe 38C80 is a field power supply unit produced by Reliance Electric. It is designed to provide stable regulated DC output for DC motor field windings and various low-power industrial DC loads. This product has been discontinued by the original manufacturer, and refurbished units are widely used for maintenance and replacement of legacy industrial control systems.

Model Number Interpretation38 is the series code for Reliance field power supply products. C represents standard industrial chassis configuration. 80 indicates the rated output voltage and power specification of the unit.

Technical SpecificationsThe input is single-phase 115/230 VAC with selectable voltage, operating at 50/60 hertz. The output is adjustable DC voltage ranging from 0 to 80 VDC, with a maximum continuous output current of 8 amperes and continuous power of 640 watts. It features low voltage ripple and excellent line and load regulation performance. This unit adopts natural convection cooling with heat sink. Built-in protection functions include overvoltage, overcurrent, short circuit and thermal shutdown. It is designed with open-frame chassis structure, and the total weight is approximately 3.2 kilograms. The product complies with common industrial safety standards.

Interface and Communication ConfigurationMain power terminals include L1 and L2 for AC input, and positive and negative terminals for DC output. Control terminals support remote on-off control, output voltage adjustment and fault signal output. Front panel is equipped with potentiometers for setting output voltage and current limit, as well as LED indicators for power status and overload faults. There is no built-in communication interface, and the unit operates with analog and hardwired control only.

Core FunctionsIt delivers continuously adjustable and well-regulated DC power to meet the power demand of field windings and other DC equipment. The dual input voltage design adapts to different industrial power supply environments. The adjustable current limit effectively protects the unit and connected loads from damage. Stable voltage output maintains consistent operation even with AC line fluctuation and load change. The compact structure allows easy installation and integration into various control cabinets.

Application ScenariosIt is mainly applied to field excitation of separately excited DC motors used on conveyors, mixers and winding machines. It also supplies power for industrial solenoids, electromagnetic valves and brakes. It serves as a direct replacement for old field power supplies in legacy automation equipment. It is suitable for all kinds of general industrial occasions requiring stable low-power DC power.

Usage and Maintenance InstructionsMount the unit vertically in a clean, dry and well-ventilated place, and reserve sufficient space around the heat sink for heat dissipation. Separate AC input cables and DC output cables during wiring, and fasten all terminals firmly. Select the correct input voltage via internal jumper before powering on, and set output voltage and current limit according to actual load requirements. Conduct quarterly maintenance to remove dust on the heat sink and check terminals and indicator lights regularly. Disconnect all power sources and wait for internal capacitors to fully discharge before any inspection or maintenance work.