Specifications

The device address set on the ADDRESS DIP switch block applies to the device connection on the bus where the
device is not the bus supervisor. For example, the DIP switches on FACs, FECs, or VMA16s (master devices) set
the device address for the device connection to the FC bus (or Remote Field Bus). If the FAC, FEC, or VMA16 also
supervise an SA bus, the FAC's, FEC's, or VMA16's address on an SA bus is 0 by default (Figure 7).
An IOM has only one device connection, which can connect to either an FC bus or an SA bus (but not both); therefore,
the device address set on an IOM applies to the bus to which the IOM is connected. (An IOM is never a bus
supervisor.)
Figure 7: MS/TP Bus Showing FC Bus and SA Bus Addresses
19MS/TP Communications Bus Technical Bulletin