Rockwell Automation T7419 ICS Regent+Plus Fire Detector Input Modules - Manual (Page 18)

Fire Detector Input Modules (T7419)
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Industrial Control Services
To program the reset function for a fire detector, you should
program the reset bit to turn on when initiated and remain on
for the time required by the fire detector to reset. Consult the
specifications on your sensors for the required reset time.
Maintenance
No periodic maintenance or calibration is required for the
digital input modules. There are no user replaceable parts
inside these modules.
Safety Considerations
The fire detector input modules are TÜV certified for Risk
Class 5 safety critical inputs. Safety critical configurations
include dual and triple redundant input modules (and sensors
if required) and associated application voting methods.
In safety critical input applications using a single sensor, it is
important that the sensor failure modes be predictable and
well understood, so there is little probability of a failed sensor
not responding to a critical process condition. In such a
configuration, it is important that the sensor be tested
regularly, either by dynamic process conditions that are
verified in the Regent, or by manual intervention testing.
Redundant sensors can be used with redundant input
modules to eliminate any single points of failure and extend
fault tolerance to include the sensors.
For additional safety considerations, please refer to the Safety
Considerations section of the Regent User’s Guide.