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Mitsubishi Electric LCPU-U-HW Safety Manuallines Page 65

Melsec l series.
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(1) System design circuit example
(a) When not using END cover with ERR terminal
For AC power
Power
supply
Transformer
Fuse
CPU module
SM52
Ym
SM403
Yn
Program
Start
switch
RA1
MC
MC
Stop
Input
switch
module
Output module
Ym
L
Yn
RA1
Output module
MC
MC2
MC1
MC1
MC2
Power
supply
Signals are input
when DC power
establishes
the rated voltage.
Start/Stop circuit
The circuit is
interlocked with
RA1
(run monitor relay).
START
SW
MC
Low battery alarm
(lamp or buzzer)
This relay turns on
when the CPU module
starts running by SM403.
Power to the output
MC
devices is shut off
when the stop switch
turns off.
The stop switch turns off
by an emergency stop
or a stop caused by
exceeding a limit value.
Interlock circuits
Externally configure
interlock circuits for
conflicting operations,
such as forward/reverse
rotations, and for parts
where abnormal operation
may result in mechanical
damage or accidents.
64
For AC and DC power
Trans-
Trans-
former
former
Fuse
Fuse
CPU module
DC
SM52
power
Ym
(-) (+)
SM403
Yn
XM
TM
TM
MC1 NO M10
NO
M10
Program
RA1
MC
STOP
SW
RA2
XM
Output module
Ym
L
Yn
RA1
Output module
MC2
MC1
MC1
MC2
Fuse
Set a period of time for
DC power to establish
the rated voltage.
RA2
Use of the voltage
relay is recommended.
Low battery alarm
(lamp or buzzer)
This relay turns on
when the CPU module
starts running by SM403
MC MC
Power to the output
devices is shut off
when the stop switch
turns off.
The stop switch turns
off by an emergency stop
or a stop caused by
exceeding a limit value.

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