IFH-1710 Red/Infrared LED Beacon
DOC-1710-MNL Rev20.doc
(10/7/2019)
Copyright 2009-2019 ITL, LLC Page 16 of
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Flash Inhibit Input
A Flash Inhibit Input is for connection to an Aircraft Detection System (ADS). The input
accepts 12 to 240 VAC or VDC (polarity insensitive) to inhibit flashing when no aircraft
are detected by the ADS. The red and green Mode LEDs will flash to indicate flashing is
inhibited. When no signal is present on the Flash Inhibit Input the IFH-1710 will operate
in the mode determined by the photodiode. This function must be enabled via DIP switch
SW2-3.
When flashing is Inhibited, in order to verify continuing operational readiness, the IFH-
1710 will perform a Readiness Test beginning around midnight Pacific Time each day.
The Readiness Test will cause the IFH-1710 to operate in night mode (flashing) for
approximately one minute. Should the IFH-1710 detect a malfunction during the
Readiness Test, the alarm relay will activate and remain activated after the test period
ends. The alarm will clear upon the next test cycle where no malfunction is detected.
The alarm will also clear if the Flash Inhibit Input is de-activated or if power to IFH-1710 is
cycled.
The ADS must deactivate the Flash Inhibit Input for at a minimum of one second every 24
hours. Failure of the ADS to deactivate the Flash Inhibit Input will result in the IFH-1710
resuming normal operation with the mode determined by the photodiode.
DIP Switch SW2-3 must be On to enable the Flash Inhibit Input.
Flash Inhibit Input electrical connections are made using the Brown & Yellow wires
in the flash head cable.
The Flash Inhibit Input accepts 12 to 240 VAC or VDC to inhibit flashing.
The Red and Green Mode LEDs flash together when flashing is inhibited.
A Readiness Test is automatically performed once every 24 hours.
The ADS must deactivate the Flash Enable Input once every 24 hours.
