Mitsubishi Electric MELSEC Q Series User Manual page 61

5
SETTINGS AND PROCEDURES BEFORE
OPERATION
(4) Electromagnetic switch for control
(5) Connecting a light curtain
24VDC
Safety light curtain
24V IN
24VDC
0V IN
5
- 19 5.4 Wiring
5.4.1 Precautions for safety devices and wiring
When using electromagnetic switch, it must be forcibly guided type and high reliable.
(a) When connecting a light curtain to the main module (QS90SR2SP-Q,
QS90SR2SP-CC), connect it to X0 and X1 sides as shown in Figure 5.9.
Connect light curtain power supply and safety part power supply by their ground
side or supply power from the same power supply.
Main module
+24V
SAFETY
24G
COM0
X0
Control
X0
output 1
COM1
X1
Control
X1
output 2
Figure 5.9 Connecting a light curtain to the main module
(b) When a light curtain is connected to the extension module (QS90SR2SP-EX),
safety shutdown from the main module may be disabled depending on the wiring
configuration.
Wire the cables referring to the connection diagram shown in Figure 5.10 and
according to the precautions below.
To the main module
24G terminal
Safety light curtain
Figure 5.10 Connecting a light curtain to the extension module
Safety shutdown from the main module turns off inputs by cutting off input power
supplied to the COM terminal of the extension module.
That is, if the wiring is configured so that power of the light curtain is supplied from
the COM terminal of the extension module, power supply of the light curtain turns
off and outputs of the extension module stops consequently in the event of the
safety shutdown.
24VDC
Safety light curtain
24V IN
0V IN
Extension module
COM0
Control
24V IN
X0
output 1
COM1
Control
0V IN
X1
output 2
Main module
+24V
SAFETY
24G
COM0
X0
Control
X0
output 1
COM1
X1
Control
X1
output 2