2)
Description of power unit check pins
Check pin
Signal
Description of signal
CPl
+24V
DC
+24V
is output at same time as
+24V
is
supplied from NC system to amplifier. At
this time,
LED1 (green) lights.
CP2
RG
CPl-CP4
ground
CP3
AL
Low-level signal
(normally*
open) when alarm
occurs inside power unit.
At this time, one
of the lamps from LED2 to LED5 will light.
CP4
CR
Signal which observes time constant of
soft-
start circuit.
Activates contactor sequence.
l
0
0
-37-
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