Mitsubishi Electric MELSEC Q Series User Manual page 498

(2) Circuit example for system design (When using the ERR. contact of the power
supply module)
496
Power supply
Transformer
C Controller module
START
SW
STOP
MC
SW
RA2
Output module
Ym
Yn
ERR.
Power supply module
Output module
Interlock circuits
Provide external
interlock circuits for
conflicting operations,
such as forward rotation
and reverse rotation,
and for parts that could
damage the machine or
cause accidents .
FOR AC/DC
Transformer
Fuse Fuse
DC
power
(-) (+)
Fuse
User
*1
program
RUN/STOP circuit
RA1 RA3
MC
RA2
Voltage relay is
XM
recommended
Low battery alarm
(Lamp or buzzer)
L Turns ON at start of
C Controller module
user program.
RA1
This relay turns off if the
ERR. contact turns off
(a stop error occurs).
RA3
MC MC
Power to output
equipment is turned
off when the STOP
signal is given.
MC2
MC1
MC1
MC2
Started when RA1
(control start output of
C Controller module)
turns ON.
The stop switch turns
off by an emergency
stop, a stop caused by
exceeding a limit value,
or turning off the ERR.
contact.