0-55325-81

About the 0-55325-81

0-55325-81 Signal Buffer Control Card  for 75HP Variable Frequency Drive Systems

The 0-55325-81 is a circuit board manufactured by Reliance Electric.  This board is typically used as a Signal Buffer Control Card for 75 HP Variable Frequency drive systems like the GV3000.   This board sometimes is marked as coming from Baldor-Reliance or possibly from Asea Brown Boveri.

The 0-55325-81 has four terminal strips located along its bottom edge.  These include one with two positions, one with four positions, one with three positions, and a terminal strip with nineteen positions.  These strips accept wired connections from their top surface. The board has three additional terminal strips within the body of the board.  Two of these are two-position and one is nine-position. The board also has one nineteen-pin vertical header connector located on its top edge.

Other board components include a single fuse in fuse holders, a line of terminal pins along the left edge (twenty-two in all,) four additional terminal pins, transistors, diodes, integrated circuits, capacitors made of electrolytic, polyester vinyl,  and ceramic materials, and resistors. The board uses wire wound and metal film resistors. The board also has ten relays. Each relay has a relay diagram printed on its top surface. Most components are marked with reference designators.  Some are also marked with their original manufacturer codes and with additional labeling. Surface wiring is used in the terminal strips.

Publications like data sheets, manuals, and user guides will provide more in-depth information regarding installation procedures and the operation of this board. Reliance was responsible for all technical support for this product.