HD-01-EX Flame Detector
372001-23 Rev. A
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The count values provide a direct measure of infrared or ultraviolet light intensity striking the respective
sensors. Accordingly, an analog output signal (4-20 ma) is provided to drive ame intensity meters or for
use in a control system. Analog output is driven by internally generated 15 Vdc and is protected by a self-
resetting fuse (PTC). The minimum and maximum scale values are user adjustable based on customer
requirements.
The IDDX amplier includes a self-check feature for ame detection system. Once ame is detected,
at user selected interval, IDDX runs a self-check routine to validate proper functioning of the system.
During self-check, 50 VDC Bias voltage to detector is removed for a brief period while processor monitors
detector signal to drop below ame relay drop out set point. If the ame signal from detector fails to
drop below the drop out set point, CPU triggers fault LED to lit, Flame relay to deenergize, Fault relay
to deenergize and locks out IDDX amplier in fault state until manually reset by technician by pressing
RESET push button.
Fault relay is normally energized to provide fail safe output and deenergizes on detection of fault. Thus,
fault relays contacts are in closed state until any fault is detected. The IDDX amplier checks for broken
wire or disconnected IDD detector head or loss of 15 VDC power to detector and triggers fault alarm when
such condition persist.
Any fault detected by rmware in the IDDX amplier, generates a corresponding error message that can
be downloaded to the Termiex/ SmartDisplay®. Any failure will be continually broadcast until reset
pushbutton is pressed.
The IDDX Flame Amplier faceplate has six (6) status LEDs to display real-time
operating conditions:
Flame (Green) Steady when the Flame Relay is in “ON” state.
Alarm (Red) Steady when the Detector faults; off otherwise.
WDT (Green) Flashing every second indicates normal operation; off during processor
internal fault except when detector is disconnected.
P1 (Green) Steady when Prole Select Input 1 is ON; off otherwise.
P2 (Green) Steady when Prole Select Input 2 is ON; off otherwise.
Self-CHECK (Green) Blinking on every period value set on Self check timer; off otherwise.
NOTICE: Analog output is generally representative of the ame intensity and
are intended for display on the operator console only. Analog output signal is not
representative of quality of combustion and must not be used as ‘loss of ame’ input to
safety control loop of the Burner Management System.
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372001-24 Rev. A
IDDX Flame Detector Amplier Manual
