Mitsubishi Q2ASCPU User Manual page 39

(1) System design circuit example
AC system
Power supply
Transformer
Fuse
CPU module
SM52
Ym
SM403
Yn
Y1
XM
SM1084
Start
Program
switch
RA1
MC Stop
Input unit
switch
RA2
Output unit
Ym
Yn
Output unit
MC
MC2
MC1
Y1
The procedures used to switch on the power supply are indicated below.
AC system
[1] Switch the power supply ON.
[2] Set the CPU module to RUN.
[3] Switch the start switch ON.
[4] The output devices are driven in
accordance with program when the
magnetic contactor (MC) turns ON.
DC power supply
established signal
input
Start/stop circuit
Can be started
by turning ON of
RA1, which is the
programmable
controller's RUN
output.
MC
XM
Output for warning
(lamp or buzzer)
L
Turned ON in RUN
status by SM403
RA1
MC
Switches the power
supply to output devices
OFF when the system
stops:
At emergency stops
MC1
At stops on reaching a
limit
MC2
Interlock circuit
Constructs external
RA2
interlock circuits for
opposing operations
such as forward and
reverse rotation, and
parts that could cause
machine damage or
accidents.
[1] Switch the power supply ON.
[2] Set the CPU module to RUN.
[3] Switch RA2 ON when the DC power supply starts.
[4] Switch the timer (TM) ON when the DC power supply
[5] Switch the start switch ON.
[6] The output devices are driven in accordance with the
AC/DC system
Power supply
Transformer
Fuse
CPU module
SM52
Ym
SM403
Yn
XM
TM
TM
MC1 N0 M10
N0 M10
Start
Program
switch
RA1
MC
MC
Stop
switch
Input unit
RA2
Output unit
Ym
L
Yn
RA1
Output module
MC2
MC1
MC1
MC2
AC/DC system
reaches working voltage. (The set value for TM must
be the time it takes for 100% establishment of the DC
power after RA2 is switched ON. Make this set value
0.5 seconds.)
program when the magnetic contactor (MC) comes ON.
(If a voltage relay is used at RA2, no timer (TM) is
necessary in the program.)
24
DC power
supply
(+)(−)
Fuse
The setting for TM
is the time taken
to establish the
DC input signal.
Voltage relay
recommended
RA2
XM
Output for warning
(lamp or buzzer)
Turned ON in RUN
status by SM403
MC MC
Switches the power
supply to output
devices OFF when
the system stops:
At emergency stops
At stops on reaching
a limit