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Correct Connection of Tamper to a Device

 

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When wiring tamper switch in series with the normally closed alarm loop, place the jumper between COM and T/NO.

Supervising the Loop — If a resistor is placed at the end of a protection zone (at the last unit in the line), that zone becomes a supervised loop. A small amount of current can always be applied to that loop, allowing it to “watch” the wiring at all times. The system can then be programmed to give a warning light or audible alarm if it is tampered with during daytime hours. “Supervising the Loop,” therefore, is a security technique used to prevent internal tampering. To supervise a loop in the normally open configuration, you simply remove the resistor from the terminal block in the control panel and place it across the N.O. and COM. terminals of the last security device on the line.

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UPDATE 30-Mar-2010


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