Rockwell Automation T7419 ICS Regent+Plus Fire Detector Input Modules - Manual (Page 2)

Fire Detector Input Modules (T7419)
2
Industrial Control Services
connect to redundant field sensors. In this dual module
configuration, a failed module can be removed and replaced
without affecting system operation.
The module requires connection to a field power supply
voltage, ranging from 15 to 40 VDC. This supply voltage is
internally regulated to power the fire detector field input
circuits.
Module Operation
A block diagram of a typical fire detector input module is
shown in Figure 1.
Figure 1. Block Diagram of Fire Detector Input Module.
A field power supply is connected to the fire detector input
module. The field power is internally regulated to 23.5 Vdc to
power the fire detector field inputs. Each input is biased to