Allen-Bradley D25043-1 Motor Speed Controller

Allen-Bradley D25043-1 Motor Speed Controller is a PC-Drive-DC board designed to regulate DC motor speed within legacy Allen-Bradley control systems. The unit accepts 115 VAC input at 50–60 Hz and, as cited in multiple listings, provides about 220 watts of motor power, making it suitable for small to medium DC motors in industrial equipment. Identified in spare‑part catalogs as a motor speed controller module, the D25043-1 is often described as a 115 V, 220 W PC DRIVE-DC BOARD variant, with several listings referencing related D25043-1 or closely related D250431 variants. Typical applications include drives for conveyors, presses, and machine tools where compact board‑level speed control of a DC motor is required, and compatibility rests on matching the module’s form factor and connector layout to the corresponding Allen-Bradley controller chassis. As with vintage speed controllers, proper installation and wiring should follow electrical safety standards and the original equipment documentation to ensure correct signaling, protection, and polarity.