Part No: AH385851U003-1 (AH385851U003,(AH385851UOO3-1) 

Description:

Parker SSD AH385851U003-1 (Usually shown on the board as AH385851U003,(AH385851UOO3-1) Spare 2-Quadrant Power Board for 591C, 591L, 591A & 591S DC Drives in current sizes; 35A, 70A, 110A, 150A, 180A & 270A and It's also used in the 599 External stack drives.

Also used in the 591P (591+) and 591P-DRV (591+ DRV) frame 3, 180A and 270A.

Manufacturer’s part number is AH385851U003-1. Could also be recognised as AH385851U003 or AH385851UOO3-1 or AH385851T003-1.

An easy way to tell the difference between 2-Quadrant and 4-Quadrant Power Boards are by the thyristors located in the bottom 3rd of the board:-

If there are two rows of thyristors then the board is 4-Quadrant. If there are only one row, then board is two quadrant (Non-Regenerative).