User guide

(T7446L, H) Relay Output Modules
PD - 7017 Mar - 06 11
Fault Mode Jumper
The fault mode jumper is located behind the ID switch cover
in the lower left - hand corner of each I/O chassis. The position
of the fault mode jumper determines the module's response to
system level faults. The fault mode jumper’s position will
cause all output m odules in the I/O chassis to either shutdown
(turn off all outputs) or to hold (hold the last state) after a
system level failure occurs. An example of a system level
failure is the failure of two processor modules.
Keying
The I/O chassis can be physically keyed to prevent accidental
damage caused by inserting a module into a slot wired for a
different module type. Figure 7 illustrates how the slot keys
are installed on the I/O chassis slot field wiring connectors.
The slot key pos itions for the relay output module are listed in
Table 2 . Both versions of the relay output module use the
same slot key positions.
Table 2 . Slot Key Positions.
Module
Upper
Connector
Lower
Connector
T7446H
T7446L
17
2