0-51845

About the 0-51845

0-51845 PRSA Power supply board

The 0-51845 is a PRSA Power supply board manufactured by Reliance Electric.  Drive boards like the PRSA were produced for several years and may be stamped with various manufacturer names depending on the year they were produced; this includes Baldor Reliance, Reliance, and ABB/Asea Brown Boveri.  The part number for the PRSA should remain constant.

The  0-51845 fits into a rack system and is designed with an attached faceplate. The faceplate connects to the PCB using three screws threaded from the bottom of the board.  The faceplate and board lock into the rack system via two lock screws that are located at the top and bottom of the front component.   The faceplate includes these screws, the board number, and a single connection opening.

The  0-51845 is populated by a transformer (TR 8579 64977-26-A,) two transistors with heat sinks, two integrated circuits, six disk capacitors, diodes, aluminum electrolytic capacitors, and resistors that are usually made from metal film.   The board uses surface wiring in several locations.

The surface of the  0-51845 is marked with a grid pattern.  This is marked off by letters on one plane (A through BD,) and with numbers by fives on a second plane (5 through 80.)  Components are not marked by reference designators. The rear edge of the board extends into a ‘tail’ with multiple conductive tabs.  This functions as a backplane connector. More information regarding the operation, installation, and maintenance of this board may be found through Reliance publications like manuals and user guides.