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2-8 Field Control™ Genius® Bus Interface Unit User’s Manual
–
October 1999 GFK-0825F
2
Bus Interface Unit Terminal Block
The Bus Interface Unit provides terminals for power and ground connections. Maximum wire size
is AWG #14. (avg 2.0690mm
2
cross-section).
The Bus Interface Unit Terminal Block also has eight input terminals for connection to a single or
dual Genius bus. These terminals accommodate up to two AWG #14 wires. The Bus Interface Unit
Terminal Block contains bus-switching circuitry permitting it to be used
as a BSM Controller
in a
dual bus redundancy system.
A connecting cable is provided with each I/O Terminal Block. It is used to connect the Bus
Interface Unit Terminal Block to the first I/O Terminal Block. The same type of cable
interconnects subsequent I/O Terminal Blocks. The cable has molded connectors that are keyed to
assure proper orientation.
The Bus Interface Unit Terminal Block is designed to be extremely reliable; it should not be
necessary to replace or rewire it after installation.
The Bus Interface Unit Terminal Block stores the configuration parameters for the station. The Bus
Interface Unit can be removed without removing the wiring or reconfiguring the station.
Connecting
Cable
Terminals for
power and
communications
wiring
I/O Terminal Block
Connectors
46457
to next terminal block