SECTION 1
EQUIPMENT DESCRIPTION
The Forney IDDX flame amplifier is a flame detector amplifier designed for use with Forney IDD series of
flame detectors. The IDDX Flame amplifier is suitable for use in a variety of industries such as oil, coal,
gas, etc. and across several applications such as gas-fired industrial burners, utility burners, waste fuel
burners, duct burners and igniters.
The IDDX flame amplifier is a stand-alone intelligent controller which includes two printed circuit boards
(PCB) assembled and packaged in a covered chassis suitable for mounting on a standard DIN rail.
The IDDX flame amplifier may be installed in any orientation (horizontal or vertical DIN rail). The IDDX
amplifier must be installed in a controlled environment (protected from dust & excessive heat). Screw
terminals are provided for electrical connections with external equipment.
The IDDX flame amplifier provides power control, signal conversion, and processing control for Forney
IDD detectors (IDD II, IDD IIU, IDD IIL, Ultra). The IDDX is designed to work with any one of the following
Forney flame detectors:
Detector
Forney Part Number
IDD II
3832121
IDD IIU
3832122
IDD IIL
3832123
IDD Ultra
3832129
Power printed circuit board (PCB) receives 24VDC input power from an external power source and
provides 5 VDC, 12 VDC, 15 VDC, & 50 VDC power for various circuits. The 15Vdc supply, powers IDD
detector heads directly while 50VDC provides bias voltage for the IDD detectors. Both 15 VDC and 50
VDC output to flame detector are protected by self-resetting fuses (PTC) .
The IDD flame detector produces an analog data signal whose amplitude and frequency vary with
light intensity. This signal is amplified using an adjustable gain amplifier (0 through 15) and fed to
microprocessor for signal processing. Microprocessor runs FFT algorithm to provide signal intensity at
different frequencies. At regular intervals, the microprocessor compares those values with configured
tuning parameters from memory. When the count value exceeds the corresponding value from memory,
the microprocessor sets a flag to indicate flame presence.
SUMMARY
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372001-24 Rev. A
IDDX Flame Detector Amplifier Manual
