OSI-RI by Fire-Lite Alarms
OSI-RI-FL Installation Guide
E56-6584-001 | October 2018
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General Description
The OSI-RI-FL is a long range projected beam smoke imaging detector designed to provide open area
protection. It is to be used with listed (UL, EN54, etc.), control panels only. The detector consists of a
transmitter/receiver unit and a reflector. Smoke entering the area between the transmitter/receiver and
reflector causes a reduction in signal. When the obscuration reaches the alarm threshold (automatically set at
the transmitter/receiver unit), the detector generates an alarm signal. Complete blockage of the beam causes
a trouble signal. Slow changes in obscuration due to a build-up of dirt or dust on the lens of the detector are
compensated for by a Microcontroller that continuously monitors the signal strength and periodically updates
the alarm and trouble thresholds. When the self-compensation circuit reaches its limit, the detector generates
a trouble signal, indicating the need for service.
Three LEDs on the detector indicate the current status: a red LED for alarm, a yellow LED for trouble, and a
blinking green LED for standby operation.
Note:
The panel controls the status of the red and green LEDs.
The alarm LED can be latched and can be reset by a FACP command.
The yellow LED will blink in specific patterns to provide a diagnostic aid when diagnosing the cause of a
trouble signal. Trouble signals automatically reset upon removing the cause of trouble. Red and yellow LEDs
can be remotely connected to the remote Alarm and Trouble outputs. These outputs mimic the functions of the
detector’s red and yellow LEDs.
After commissioning the 4 arrows will indicate the level of automatically set sensitivity.
Summary of Contents for OSI-RI-FL
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