page 52 IRIS-4 Technical Reference Manual.docx 12/01/2023
8.5 VdS Fire Applications
The relays are assigned as follows:
Relay A: ATE fault (normally closed)
Relay B: NAK (normally closed)
Relay C: Fire ATE fault (normally closed)
Relay D: Fire Alarm Receiving Equipment (ARE) ack (normally closed)
The input pins are assigned as follows:
Pins 2 to 16: User definable
Pin 1: Fire
An additional external relay with a voltage rating that matches the voltage of the FASCIE equipment is
required:
For 12V equipment: relay item = OMRON G2R-1-T 12VDC
For 24V equipment: relay item = OMRON G2R-1-T 24VDC
The fire alarm signaling shall be connected as illustrated below:
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