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5.4 Wiring
5.4.1 Precautions for safety devices and wiring
5
SETTINGS AND PROCEDURES BEFORE
OPERATION
(3) Output contact rating
Output contact rating is regulated to each category by EN ISO13849-1.
Use it with taking care of the following points.
* 1: Even if a Category 4 compliant system is configured, when the rated load exceeds 3.6A, the
system becomes Category 3 according to the standard.
* 2: The minimum application load is 24VDC/5mA (reference value).
(4) 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.
(5) Electromagnetic switch for control
When using electromagnetic switch, it must be forcibly guided type and high reliable.
(6) Connecting a light curtain
(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 5.14.
Connect light curtain power supply and safety power supply by their ground side
or supply power from the same power supply.
Figure 5.14 Connecting a light curtain to the main module
Table 5.8 Output contact rating
Compliant category Rated load Remarks
Category 3 or less 5.0A Rated load 250VAC 50/60Hz 30VDC
EN60947-5-1 15AC 240VAC 2A cos = 0.3
13DC 24VDC 1A L/R = 48ms
*2
Category 4
*1
3.6A
COM1
X1
X0
24G
+24V
24VDC
24VDC
COM0
24V IN
0V IN
Control
output 2
Control
output 1
Safety light curtain
SAFETY
X0
X1
COM1
X1
X0
24G
+24V
24VDC
COM0
24V IN
0V IN
Control
output 2
Control
output 1
Safety light curtain
SAFETY
X0
X1
Main module
Main module