Description of power unit check pins
Check pin
Signal
Description of signal
DC
is output at same time as
is
supplied from NC system to amplifier. At
this time, LED1 (green) lights.
RG
ground
AL
Low-level signal
open) when alarm
occurs inside power unit.
At this time, one
of the lamps from LED2 to LED5 will light.
CR
Signal which observes time constant of
start circuit.
Activates contactor sequence.
l