Spectrex 40/40L-LB UV/IR Flame Detector Series - Manual (Page 58)

SharpEye TM UV/IR Flame Detector User Guide
46 Outputs
 HART Protocol
The HART protocol is a digital communication signal at
a low level on top of the 0-20mA. This is a bi-
directional field communication protocol used to
communicate between intelligent field instruments and
the host system. HART is available in wiring options 2
and 3.
Through the HART protocol the detector can:
 Display set-up
 Reconfigure the set-up
 Display detector status and definition
 Perform detector diagnostics
 Troubleshoot
For more details refer to HART Manual 777030.
 Communication Network: The detector is equipped
with an RS-485 communication link that can be used in
installations with computerized controllers.
The communications protocol is Modbus compatible.
 This protocol is a standard and widely used.
 It enables continuous communication between a
standard Modbus controller (Master device) and a
serial Network of up to 247 detectors.
Heated
Optics
The front window can be heated to improve performance
in icing, condensation and snow conditions. The heater
increases the temperature of the optical surface by 5-8°F
(3-5°C) above the ambient temperature. The heated optics
can be configured in three ways:
 Off: The optics are not heated
 On: The optics are heated continuously
 Auto: Operated only when the change of temperature
requires the heating. (default)
In Auto mode the start heating temperature can be
defined between 32°F - 122°F (0°C - 50°C). The detector
stops heating the window when the temperature is 27°F
(15°C) above the start temperature.