The GE digital I/O board DS200TCDAH1B has a microprocessor and several programmable read-only memory (PROM) modules. It also contains 1 10-LED block and 2 50-pin connectors. The GE digital I/O board DS200TCDAGH1B is also fitted with 8 jumpers and 1 LED visible from the side of the board. The GE digital I/O board DS200TCDAH1B also features 2 3-pin connectors. One 3-pin connector has the ID JX1 and the other has the ID JX2.

DS200TCDAH1B

The ids assigned to the eight jumpers are prefixed with JP. For example, a jumper is assigned ID JP1. Another jumper is assigned ID JP2, and so on. The test point also has a prefix assigned to the ID. The test point is prefixed with TP. For example, a test point is assigned the ID TP1. The other test site was assigned the ID TP2. By using qualified test equipment, maintenance personnel can test the various circuits on the circuit board and identify potentially repairable faults.