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5.4 Wiring
5.4.1 Precautions for safety devices and wiring
5
SETTINGS AND PROCEDURES BEFORE
OPERATION
5.4 Wiring
This section explains wiring of the safety relay module, power supply, and I/O module.
5.4.1 Precautions for safety devices and wiring
This section explains precautions for various safety devices and wiring.
(1) Safety input specifications
Table 5.4 shows specifications of safety inputs. Take care of safety device to be
connected.
Wire the safety input so that the external wiring length can be 50m (164.04 feet) or
less.
* 1: Output devices which have built-in power supply and do not require external power supply from
COM terminal, such as laser scanners, are included.
* 2: When connecting a light curtain to the QS90SR2SP-EX, refer to the precautions written under
Section 5.4.1 (6).
(2) External wiring of safety input
(a) When only main module is used in a system
Limit the maximum wire length of the safety input (X0, X1) to 50m or less.
Table 5.4 Connectable safety devices
Module model Terminal Connectable device
QS90SR2SP-Q
QS90SR2SP-CC
QS90SR2SP-EX
X0
COM Positive common
•No-voltage contact (mechanical switch)
•Light curtain of Type 4
*1
(When using a
light curtain, connect it to X0 and X1.)
*2
X0 Input X0
X1
COM Positive common
X1 Input X1
QS90SR2SN-Q
QS90SR2SN-CC
QS90SR2SN-EX
X0
COM Positive common
•No-voltage contact (mechanical switch)
only
X0 Input X0
X1
COM Negative common
X1 Input X1
Table 5.5 Maximum wire length of the safety input when only main module is used
System configuration Diameter Maximum wire length
QS90SR2SP-Q/QS90SR2SN-Q
0.2 to 0.75mm
2
50m
QS90SR2SP-CC/QS90SR2SN-CC
0.2 to 2.5mm
2