Rockwell Display Module Supply Controller +12 +5 -21 +28 VDC Switched Unswitched

Rockwell Display Module Supply Controller +12 +5 -21 +28 VDC Switched Unswitched

This is a Rockwell Display Module Supply/Controller — a custom multi-output DC power supply and control unit providing both switched and unswitched DC rails at +12V, +5V, -21V, and +28V. The unit consists of two stacked enclosures: the lower houses the main power supply, and the upper serves as the display controller interface with individual per-rail enable switches, LED status indicators, and dimming control functions. It connects to display or control systems via a rear-panel multi-pin circular connector (P1) and provides banana-jack binding posts for direct voltage access on both the switched and unswitched output panels.

Specifications & What's Included

• Switched DC outputs: +12V, +5V, -12V, +28V (banana-jack binding posts, front panel)
• Unswitched DC outputs: +12V, +5V, -12V, +28V (banana-jack binding posts, rear panel)
• Per-rail manual ON/OFF toggle switches on top control panel
• Auto Enable per rail: +12, +5, -21V, +28V
• Front-panel controls: MASTER, RESET, LOC DIM, EXT DIM, DIM CONT, DIM TP
• Green LED status indicators per voltage rail
• Red and yellow LED indicators on top panel
• AC power toggle switch (ON/OFF) on rear panel
• Multi-pin circular connector (P1) on rear panel for system interface
• Rear-mounted Papst cooling fan
• Two-unit stacked benchtop assembly
• AC power cord included
• Labeled on top panel: "DISPLAY MODULE SUPPLY/CONTROLLER"

Applications

Multi-output DC power supplies of this type, providing both switched and unswitched voltage rails alongside dimming control logic, were used to power display modules, indicator panels, and operator interface systems in industrial automation and control environments. The combination of switched rails (controllable via logic or front-panel switches) and always-on unswitched rails is typical of designs where some loads — such as backlit displays or indicator lamps — need to remain powered independently of the control logic state. The dimming control functions (LOC DIM, EXT DIM, DIM CONT, DIM TP) suggest this unit was specifically designed to drive and modulate display brightness in a larger system, such as a machine control console, process control display panel, or avionics/industrial operator station from the 1980s to early 1990s era. Units like this are sought by maintenance engineers keeping legacy industrial control systems operational, as well as by electronics hobbyists and lab users who need a stable multi-rail DC supply with convenient banana-jack access points.