General

The FD2000 series products consists of an infrared transmitter, a receiver and a control unit. They are designed to be used where point smoke detectors are not applicable due to height or inaccessibility. The control units have relay outputs for alarm and fault and may therefore be monitored by all types of fire panels.

Installer friendly

The control unit, which contains the threshold settings and test meter output, may be conveniently mounted at ground level. Wiring is restricted to a minimum as no connection is required between transmitter and receiver. The low power consumption of the units allows the powering of multiple sets from a single power supply without compromising the system's autonomy.

A wireless alignment tool reduces installation time considerably. On difficult sites the receiver and transmitter may be used in reflective mode by mounting the transmitter and receiver next to each other and using passive reflectors.

Reducing false alarms

When smoke is present in the beam path, the received signal is reduced by a level determined by the density of the smoke. In the event of the smoke reducing the signal strength between the obscuration threshold and 93% for a period between 8 to 10 seconds, the fire alarm output is activated. To optimise for every environment, the units provide three selectable alarm thresholds, each set for a different % obscuration.

An automatic gain control prevents nuisance alarms caused by long term signal degradation, e.g. in the case of dirt build up. Total obscuration (> 90%) will generate a fault and not an alarm.

Downloads

• Datasheet