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MELSEC-Q
9 LOADING AND INSTALLATION
(2) System design circuit example (when using ERR contact of power
supply module)
STRAT
SW
STOP
SW
MC
RA1
MC
RA2
RA2
XM
L
Ym
OUTPUT MODULE
MC2
MC1
MC1
RA3
M10
PROGRAM
CPU MODULE
NO
TRANSFORMER
FUSE
TRANSFORMER
POWER
SUPPLY
DC
POWER
SUPPLY
MC2
MC
MC
Interlock circuits asnecessary.
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.
In the case of an
emergency stop or a stop
caused by a limit switch.
Ym
SM52
TM
XM
MC1 NO M10
TM
RUN/STOP circuit
interlocked with
RA1
(run monitor relay)
Input switched
when power
supply
established.
Low battery alarm
(Lamp or buzzer)
Voltage relay is
recommended
Set time for DC
power supply to
be established.
FOR AC/DC
(-)
(+)
ERR
OFF at stop error
from ERR
POWER SUPPLY
MODULE
Yn
SM403
RA3
RA1
Yn
Power to output equipment
switched OFF when ERR
contact turns OFF.
FUSE
FUSE
OUTPUT MODULE
The power-ON procedure is as follows:
For AC/DC
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 0.5s.)
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.)