Installation manual

The 2 EOL resistors should be connected at the contact and not at the

control panel. With 2 EOL resistors connected in this way, the system is

able to distinguish open and closed contacts from open circuit and short

circuit wiring providing full supervision of the zone contacts and cables.

Any short or open circuit fault will trigger a Zone Trouble Alarm which

can be reported to the programmed phone numbers. Where double

end-of-line resistors are used, the following circuit resistances should

be measured and verified on the zone wiring PRIOR to their connection

into the zone terminals. Use them as a guide when commissioning a

system or tracing a fault.

Also check that there is no short circuit between the 12V auxiliary

supplies and zone circuit wiring and the power cables connected to the

auxiliary supplies do not contain any shorts between 0v and 12V.

zeroShorted / Fault

Open circuit (infinity)

Tamper / Fa

ult

7 K 4Open / Active

2 K 7Closed /Healthy

Zone Resistance (Ohms)

Status

4-wire Smoke Detectors (End Of Line)

Smoke Detectors are usually connected as Normally Closed (N.C). The

corresponding Header JZ1 to JZ8 should have a shunt (shorting link)

inserted into the position away from the terminals. Smoke and Heat

Detector zones are programmed as Fire Zone Type 23. A Pulsed On/Off

siren pattern indicating Fire Evacuation is produced when this zone type

is activated (by default). If the zone wiring is cut or open-circuit or

shorted, a Zone Trouble alarm is generated for fire zones using EOL

resistors.

Connection of Multiple Shock Detectors to a zone

The system has the unique ability to announce the type of the

activated zone during Security Check (during arming) , alarm history,

alarm tracking, and event log. So if more than one detector is

connected to a zone input, it should ideally be of the same type and in

the same location, for example, magnetic contacts for several windows

in the same room. The following diagram shows shock detectors on the

same zone. Some ‘active’ vibration detectors such as Optex can latch

their LED on following an alarm for identification. To make the most of

this feature, supply the detectors via a normally closed relay connected

to an output. Use the arming response (location 1850) to pulse the

output using a response to reset the detectors during arming by

interrupting their the supply, this may announce their zone briefly

during arming.

Comfort Installation Manual