Protectowire 2000 FireSystem Specifikace stáhnout pdf (Strana 26)

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5C3B9@D9?> - Supervision of power to 4-wire detectors is necessary to ensure their operation. Supervision is accomplished by

installing a Power Supervisory Relay (PSR), Model PSR-2040 or its equivalent after the last detector. The relay contacts are nor-

mally closed when power is present at the last detector. These contacts are wired in series with the supervised detection circuit. A

loss of power due to a break (open) in the 4-wire detector power wiring will allow the Power Supervisory Relay to de-energize

opening the closed contact and causing a trouble in the detection circuit.

Notes:

1. PSR-2040 Power Supervisory Relay shown with relay in the normally energized supervisory state (closed).

2. Install Power Supervisory Relay in the last detector back box.

3. ELR-4.7K - End-of-line device supplied with the control panel.

4. Some 4-wire detection devices provide their own power supervision. For these types of devices, a power supervisory

relay may

not be required.

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Protectowire 2000 FireSystem Specifikace Strana 26