Xtralis ICAM IAS-2 Product Manual page 16

IAS-2 Product Guide
4.3.1 Configuration with two Addressable Detectors
The following schematic shows detectors wired directly to the loop with the FAULT 2 relay connected to loop
via addressable module.
Figure 4-1: Wiring diagram for an IAS-2 system with two addressable detectors
4.3.2 Configuration with Conventional Detectors
The terminating resistor is wired across both fault relays so a flow fault in either channel will produce a zone
fault.
Figure 4-2: Wiring diagram for an IAS-2 system with two conventional detectors
4.3.3 Configuration with Units Connected in Series
The schematic shows the first and last units in a chain of IAS-2 units. Zone circuit wiring is returned from last
unit to first via fault relay contacts in each unit and a terminating resistor fitted to first unit as shown. A flow
fault condition in any unit will break the connection to the terminating resistor and indicate a zone fault without
affecting the operation of the detectors themselves.
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ICAM by Xtralis
Legend
1 Display/Detector Mounting Board
2 Main Circuit Board
3 Ribbon Connector
4 Detector 1
5 Detector 2
7 Loop Interface Module
8 Addressable Loop/Conventional
Circuit
Legend
1 Display/Detector Mounting Board
2 Main Circuit Board
3 Ribbon Connector
5 Detector 1
6 Detector 2
7 Terminating Resistor
9 Addressable Loop/Conventional
Circuit
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