Wiring; Precautions For Safety Devices And Wiring - Mitsubishi Electric MELSEC Q Series User Manual

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.
Module model
QS90SR2SP-Q
QS90SR2SP-CC
QS90SR2SP-EX
QS90SR2SN-Q
QS90SR2SN-CC
QS90SR2SN-EX
(2) Output contact rating
Output contact rating is regulated to each category by IEC/EN954-1.
Use it with taking care of the following points.
Compliant category
Category 3 or less
*1
Category 4
(3) Protecting output contact
The output contact of a module does not include a fuse.
Externally connect protection fuse to prevent welding of output contact.
To meet the Category 4, use a fuse of 3.6A.
If short-circuit current is less than 5.0A, a fuse is unnecessary.
As measures against inductive load, protection such as using surge absorber to
output contact is recommended.
Table 5.4 Connectable safety devices
Terminal
COM
X0
X0
COM
X1
X1
COM
X0
X0
COM
X1
X1
* 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 (5).
Table 5.5 Output contact rating
Rated load
5.0A Rated load 250VAC 50/60Hz 30VDC
EN60947-5-1 15AC 240VAC 2A cos = 0.3
3.6A
* 1: Even if Category 4 compliant system is configured, when the rated load exceeds 3.6A, the system
becomes equivalent to Category 3 according to the standard.
* 2: The minimum application load is 24VDC/5mA (reference value).
5.4.1 Precautions for safety devices and wiring
Positive common
•No-voltage contact (mechanical switch)
Input X0
•Light curtain of Type 4
Positive common
light curtain, connect it to X0 and X1.)
Input X1
Positive common
Input X0 •No-voltage contact (mechanical switch)
only
Negative common
Input X1
Remarks
13DC 24VDC 1A L/R = 48ms
Connectable device
*1
(When using a
*2
*2
5
5.4 Wiring
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