Instruction Manual

Fire Sentry SS4
Detectors
Operation
The Fire Sentry SS4 detectors operate from standard 24 Volt DC power and
interfaces to approved fire alarm panels or standard PLC’s. When power is
applied, a self-test is performed and the fault relay resets to show no faults.
The front LED lights flash every ten seconds to indicate power is on.
The continuous spectral data stream of information from the sensor array is
analyzed by the microprocessor. Upon alarm, the detector activates the
alarm relay and stores all the pre-fire spectral data in non-volatile memory for
retrieval and evaluation. This Fire Pic™ data can be used to postulate the
cause of the fire.
As part of the FS2000™ System, the SS4 family of detectors communicate
with CM1-A Controller via a four wire bi-directional RS-485 FireBus™.
Tri-Mode Plot Shown on Computer Display
The field of view for the Fire
Sentry SS4 detectors is the
widest in the industry with a 120°
cone of vision. This means more
hazard area can be covered by
each detector. Greater sensitivity
also increases the volume
covered by each detector, up to
four times more than some other
detectors.
Using sophisticated
microprocessor signal processing
algorithms, false alarm rejection
is maximized – with virtual
immunity to false alarms from arc
welding, corona discharge and
other common non-fire sources.
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