Cooper Security i-on160EX Instalační příručka stáhnout pdf (Strana 28)

The System Bus i-on160

Page 22

Processing Priority

When several detectors are activated at the same time, the control unit always

processes PA and Normal Alarm detectors first, followed by Fire, and then all

other alarm types. The control unit always processes alarms before Alerts.

Tampers and the Bus

Every device that can be attached to the bus has its own anti-tamper switch.

When this switch is triggered the device sends a message down the bus to the

control unit, which then starts the appropriate alarms, shows a tamper alert on

the keypad and communicates a tamper message to the ARC.

If a bus device is disabled, and cannot send any messages on the bus then the

control unit marks it as “missing”. (A bus device might be disabled by physical

damage, loss of power, or by a cut bus cable. The control unit starts a tamper

alarm and displays an alert at the keypad, for example “P1:Missing R1-03” for

an expander or “P1:Missing K1-52” for a keypad. In a Grade 3 system the

control unit will also communicate a missing bus device to the ARC as a

tamper.

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Cooper Security i-on160EX Instalační příručka Strana 28