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F-Guard IR3 HD User Manual
variable of optical contamination (BIT signal level) is accessible via HART and/or
MODBUS. The value of the field ranges from 0 (clean) to 100% (BIT fault).
Auxiliary Relay
The Aux relay can be set to operate in parallel to the alarm relay, at pre-alarm level or on
“dirty window warning”.
Window Heater
The detector is equipped with a heater to prevent condensation and icing on the window.
If enabled, the heater operates automatically depending on temperature.
Video Settings
The detector is equipped with a video camera and processing module. If enabled (“Video
module” setting) the detector provides video outputs and records flame alarm events.
The events are recorded from 1 minute before the flame was detected to 1, 2 or 3
minutes after (depending on the “post-alarm video recording duration” setting).
Digital video output is provided via ethernet and ONVIF Profile S protocol. Composite
(analog) video output is provided in NTSC or PAL format, depending on the “Video
analog output” setting
Modbus Address
The detector can communicate with the
Gastech
communicator software using a
Modbus RTU compatible protocol on RS-485. This protocol allows for a network of
detectors to be connected, each with a unique Modbus address. The address of the
detector can be set to any value in the range 1–247.
Manual BIT – Alarm Output Test (Full loop test)
When enabled, the alarm outputs are activated when a
Manual
BIT is initiated. See
section 4.2 for details.
WARNING
Make sure all fire extinguishing actions or alarms connected to the detector are
DISABLED when the manual BIT is initiated and the “Manual BIT – Alarm Output
Test” is enabled as the Manual BIT will set the 0-20mA terminal to 20mA and close
the alarm relay and auxiliary relay if configured.
