Rockwell Automation T7480 ICS Regent+Plus Guarded Analog Output Modules - Manual (Page 24)

Guarded Analog Output Modules (T7480)
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Industrial Control Services
fault (green Activity LED turns off and the red Fault LED
turns on).
11. Disconnect the one end of the 47K Ohm resistor from TP4.
The other end should still be connected to the top lead of
the 10K Ohm resistor on RN101. Restore the module to
the Active state by performing a voted reset. Now take the
end of the 47K Ohm resistor that you removed from TP4
and reconnect it to TP3 (+2VREF). Verify that the module
indicates a fault.
12. Restore the module to the Active state by performing a
voted reset.
13. Repeat steps 10 through 12 for output channels 2 through
6 connecting the 47K Ohm resister to the appropriate
resistor network (RN201 through RN601). Use the same
test points TP4 and TP3 as used for output channel 1. In
each case, verify that the fault injection procedure causes a
fault indication on the module.
14. If any of the fault injection tests does not produce a fault
indication, the module should be returned to the factory for
repair or replacement.
15. Calibration is complete. Unplug the printed circuit board
from the I/O extender module and replace it in its
clamshell housing. Remove the I/O extender module from
the I/O chassis and reinstall the module in the I/O chassis.
The module’s red Fault indicator will be on until you
perform a voted reset. After the voted reset is complete,
the module’s green Active indicator should turn on.
Safety Considerations
The Guarded analog output module is TÜV certified as non-
interfering, and can be used in a safety system for non-safety
critical outputs.
Analog outputs are rarely used to perform safety critical
interlock functions, but processes may have control
applications that demand a high integrity for analog control
functions. The guarded analog output module is ideally
suited for these types of applications. In all applications the