Mitsubishi Electric Melsec-Q172DCPU User Manual page 119

2 SYSTEM CONFIGURATION
Servo amplifier
(MR-J3- B)
Control Main circuit
power supply power supply
L11 L21 L1 L2 L3
Contactor
#1
Contactor
#2
L1 L2 L3
(Main circuit power supply)
(4) Wiring example for the safety signal module
(a) Wiring example for door signal to safety signal module and AC contactor.
Wiring example to shut off contactor by the following methods are shown in
the diagram below.
• Shut-off signal from the Motion CPU side of safety signal module
• Shut-off signal from the PLC CPU side of safety signal module
• Contactor shut-off output MC1 and MC2 of servo amplifier
Input the output signal of auxiliary normally closed contact into the safety
signal module to detect the weld of contactor.
Door sensor used as a safety signal should have two outputs and is wired to
both Motion CPU side and PLC CPU side. Sensor and switch used as
safety signal should be the ones for weak signal use (e.g. twin contact) to
prevent contact failure.
External power supply
Relay
MC1
Relay
MC2
Reactor
Door1 close/open
confirmation sensor
24VDC
1B01
1B09
1A20
1A19
1A18
1A17
1A01
2B01
2B09
2A20
2A19
2A18
2A17
2A01
Door2 close/open
confirmation sensor
2 - 86
Safety signal module
(Q173DSXY)
Motion CPU side
Motion IO
Drive power
shut-off signal
MC1 normally
closed signal
MC2 normally
closed signal
Door1 signal
Door2 signal
PLC CPU side
PLC IO
Drive power
shut-off signal
MC1 normally
closed signal
MC2 normally
closed signal
Door1 signal
Door2 signal
: Wiring for input/output control
of the safety signal
: Wiring for assist the safety signal