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CS175-275-575-875 Installation Guide
6 WIRING ZONES
6.1 General
The control unit inputs are set up as standard EOL (4K7) freely programmable zones.
However, by programming the zones as dual loop, all control unit zone inputs can be
programmed to provide alarm and tamper indications on the same zone.
6.2 Dual wiring
One zone includes both alarm and tamper wiring.
The alarm devices are wired in series and a 4K7 resistor is fitted in parallel across the
closed circuit contacts.
The tamper contacts are wired in series with a 4K7 EOL resistor.
•
All devices closed - loop resistance is 4K7.
•
Tamper device open - loop is an open or short circuit.
•
Alarm device open - loop resistance is 9K4 (EOL resistor PLUS parallel resistor).
4K7
4K7
E.O.L.
1
Zone terminal
3
Alarm contact
2
Sensor
4
Tamper contact
6.3 Single wiring
Two zones are required, one zone for alarm and one zone for tamper. The tamper
contacts are wired in series with a 4K7 EOL resistor.
4K7
E.O.L.
4K7
E.O.L.
1
Zone terminal
3
Alarm contact
2
Sensor
4
Tamper contact
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