Rockwell Automation T7488/T7488A ICS Regent+Plus Monitored Guarded Output Modules - Manual (Page 6)

Monitored Guarded Output Modules (T7481/81A, 84, and 88/88A)
6 (Issue 2)
Industrial Control Services
monitored by the application program or external operator
interface equipment to dispatch maintenance personnel to
correct the field connection problem.
Field faults such as open load, shorted load, blown fuse and
absence of field power, will mask an output switch fault. When
load/fuse faults are detected, they should be repaired as soon
as possible.
If the health of spare, unused output points is important, then
a minimum load device should be connected to these points.
Front Panel
Figure 2 shows the physical features of the monitored
Guarded output modules. The front panel of each module
contains a module active and fault status indicator, a
shutdown indicator, as well as output fuses, output status
indicators and load/fuse fault indicators for the output
circuits.
Active/Fault Status Indicators
These green and red LEDs indicate the overall health of the
module and output circuits. During normal operation, the
green ACTIVE indicator flashes at the controller's scan rate.
If a module fault is detected, the red FAULT indicator turns
on and the green ACTIVE indicator turns off.
Shutdown Indicator
Upon loss of communications with the controller, output
modules enter either a shutdown or hold fault mode. If the I/O
unit is set to shutdown, the red SHUTDOWN
indicator will
turn on when communications with the controller are lost. If
the I/O unit is set to hold, the SHUTDOWN indicator will
always be off (see page 16, Fault Mode Jumper).
Note: