Description
The SCR series is a universal lamp alarm relay designed to
sense the failure of flashing or steady incandescent beacon
lamps or steady side lights. The toroidal current sensor provides
isolation and allows monitoring of more than one line at a time.
The SCR Series energizes when one or more lamps fail. It will
monitor the operation of one to four side lights and up to four
beacon lamps.
Operation
When a lamp fails, the SCR Series senses a decrease in current
flow. After a fixed time delay, the LED glows and the two alarm
outputs energize. The outputs and the LED are reset when
the failed lamps are replaced and the current returns to the
nominal setting, or when the input voltage is removed. The SCR
will sense an open flasher, it will not sense a continuously ON
flasher (see FB Series).