Mitsubishi Electric Melsec-Q172DCPU User Manual page 120

2 SYSTEM CONFIGURATION
Servo amplifier
(MR-J4- B)
Shut-off signal
Shut-off
confirmation
signal(1)
Shut-off
confirmation
signal(2)
Shut-off signal
Control
Main circuit
power supply
power supply
L11 L21 L1 L2 L3
L1 L2 L3
(Main circuit power supply)
(b) Wiring example for door signal to safety signal module and STO terminal.
Wiring example to wire 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
• STO terminal of servo amplifier
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.
1) MR-J4- B use
External power supply
24VDC
CN8
4
STO1
3
STO COM
8
TOF COM
6
TOFB1
7
TOFB2
5
STO2
Reactor
Door1 close/open
confirmation sensor
1B01
1B09
1A19
1A18
1A17
1A01
2B01
2B09
2A19
2A18
2A17
2A01
Door2 close/open
confirmation sensor
2 - 87
Safety signal module
(Q173DSXY)
Motion CPU side
Motion IO
Drive power
shut-off signal
Shut-off
confirmation
signal
Door1 signal
Door2 signal
PLC CPU side
PLC IO
Drive power
shut-off signal
Shut-off
confirmation
signal
Door1 signal
Door2 signal