Description

The SCR9L is a universal lamp alarm relay designed to sense the

failure of flashing or steady LED beacon lamps or obstruction

lamps. The SCR9L energizes when one or more lamps fail. It

will monitor the operation of one to eight beacon or obstruction

lamps. All monitored lamps must be the same wattage and

voltage. When connected to a site monitoring system, it

provides the remote lamp monitoring protection required by the

FAA-AC No: 150/5345-43E.

Operation

When a lamp fails, the SCR9L senses a decrease in current flow.

After a 10s trip delay, the onboard LED glows and the two alarm

outputs energize. The outputs and the LED are reset when the

failed lamps are replaced and the unit is recalibrated. The SCR9L

will sense an open flasher, it will not sense a continuously ON

flasher (see FB Series). Removing input voltage de-energizes the

output and the LED‘s. It does not change the calibration.