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).