The GE RST Termination Board DS200QTBAG3ADC features 2 terminal blocks with terminals for 72 signal wires in each. It also contains 1 40-pin connector. The ID for the 40-pin connector is JFF. It also is populated with 1 serial connector. The 40-pin connector is used to connect to a ribbon cable. The ribbon cable carries signals that are transmitted to the board from other components. Alternatively, the ribbon cable carries signals that the board transmits to other boards and components. During normal processing, the boards receive signals from other boards and processes the information before sending on the information to another board or component.
The ribbon cables for the 40-pin connector contains 40 separate signals on 40 separate small strands of fine copper wire. You will also notice that little support is provided between the plastic connector and the ribbon cable. For that reason, it is best practice to not pull on the ribbon cable to disconnect it from the board. It is easy to pull the fine copper wires out of the plastic connector. Instead, hold the plastic connector with one hand and gently pull it out of the connector on the board.
To connect a ribbon cable, align it with the connector on the board and press it into the connector. If you visually inspect the connection and you see space between the ribbon cable and the connector on the board, the cable might not be fully seated. In that case, gently press the ribbon cable until it is fully seated.