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MELSEC-Q
9 LOADING AND INSTALLATION
(1) System design circuit example (when not using ERR contact of
power supply module)
START
SW
STOP
SW
MC
RA1
MC
RA2
RA2
XM
L
Ym
Yn
OUTPUT MODULE
MC2
MC1
MC1
RA1
M10
PROGRAM
CPU MODULE
NO
TRANSFORMER
FUSE FUSE
POWER
SUPPLY
POWER
SUPPLY
TRANSFORMER
FUSE
DC
POWER
SUPPLY
FUSE
MC2
MC
MC
In the case of an
emergency stop or a
stop caused by a limit
switch.
Interlock circuits as
necessary.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 if
no interlock were used.
Power to output equipment
switched OFF when the
STOP signal is given.
In the case of an
emergency stop
or a stop caused
by a limit switch.
Power to output
equipment
switched OFF
when the STOP
signal is given.
Ym
SM52
SM52
SM403
SM403
TM
XM
MC1 NO M10
TM
MC1
MC2
MC
MC2
MC1
OUTPUT MODULE
L
RA1
Ym
Yn
INPUT MODULE
START
SW
STOP
SW
MC
RA1
MC
PROGRAM
Low battery alarm
(Lamp or buzzer)
RA1 switched ON by
SM403
(run monitor relay)
RUN/STOP circuit
interlocked with RA1
(run monitor relay)
Input switched
when power
supply
established.
ON when run by
SM403
Low battery alarm
(Lamp or buzzer)
Voltage relay is
recommended
Set time for DC
power supply to
be established.
FOR AC/DCFOR AC
CPU MODULE
Ym
Yn
(-) (+)
MC
Yn
OUTPUT MODULE
TRANSFORMER
OUTPUT MODULE
The power-ON procedure is as follows:
For AC
For AC/DC
1) Switch power ON.
2) Set CPU to RUN.
3) Turn ON the start switch.
4) When the magnetic contactor (MC) comes on, the output
equipment is powered and may be driven by the program.
1) Switch power ON.
2) Set CPU to RUN.
3) When DC power is established, RA2 goes ON.
4) Timer (TM) times out after the DC power reaches 100%.
(The TM set value should be the period of time from when
RA2 goes ON to the establishment of 100% DC voltage.
Set this value to approximately 0.5 seconds.)
5) Turn ON the start switch.
6) When the magnetic contactor (MC) comes on, the output
equipment is powered and may be driven by the program.
(If a voltage relay is used at RA2, no timer (TM) is required
in the program.)