H.100 boards are connected to one another with an H.100 bus cable. The two boards located at the end of the H.100 bus must have bus termination enabled, as shown in the following illustration:
DIP switch S1 controls the H.100 bus termination. The DIP switch is located on the component side of the CX 2000 board. By default, all switches are set to OFF (H.100 bus termination disabled). Setting all S1 switches to ON enables H.100 bus termination. Set all S1 switches to ON for the boards that are on the ends of the H.100 bus.