Rockwell Automation T3464 ICS Regent AC Guarded Digital Output Module - Manual (Page 18)

AC Guarded Digital Output Module (T3464)
1 8
Industrial Control Services
To program fault tolerant outputs two output coils driven by
the same control logic are used as shown in Figure 11.
Figure 11. Programming Fault Tolerant Outputs.
In this illustration A, B, C, D represent various logic elements
used to drive the outputs; XV103A represents the output on
one Guarded output module; and XV103B represents the
output on the other Guarded output module.
Maintenance
No periodic maintenance or calibration is required for this
module.
Fuses can be removed and replaced without removing the
module from the I/O chassis. Turning the fuse holder one-
quarter turn from its locked position releases the fuse holder,
extending the fuse and allowing it to be removed.
To prevent damage to the module, replacement fuses must be
of the same rating and type (see Specifications, below).
Diagnostic Messages
When the module is first inserted into an I/O chassis or when
system power is applied, the display will go through the
initialization sequence shown in Table 3.