SICK WEU26-3 User Manual

Operating Instructions Chapter 5
WSU/WEU263
8013338/YTA4/2016-03-24 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 23
Subject to change without notice
Electrical installation
5.2 System connection
5.2.1 Pin assignment sender
Pin Designation
1/2 Voltage supply 24 V DC
3 Ground 0 V
10
11
Test contacts
PE Protective earth
The torque for the PE connection is 2.0 ± 0.5 Nm.
Connect the contacts on the WSU26-3 only to circuits that comply with the requirements
for safety extra-low voltage (SELV/PELV).
1/2
3 10 11
PE
+ 24 V
0 V
5.2.2 Tested
The test makes it possible to check the loads connected. For this purpose the electrical
connection between test contacts 10 and 11 on the WSU26-3 is interrupted for a certain
amount of time (see chapter 9 “Technical specifications”). As a result the sender does not
emit a beam of light and simulates an interruption to the light path.
The test must be performed by the machine controller during the unhazardous phase (e.g.
an unhazardous movement). If the test is not successful, the machine must receive a shut
down signal from the machine controller.
To operate the WSU/WEU26@ 3 devices without testing, a wire jumper must be connected
between the test contacts 10 and 11 on the WSU26-3.
Use test function for the purpose described!
The test input is only allowed to be used in the manner described.
Tab.
9
:
Assignment of the
sensor contacts, sender
WSU26-3
Note
Note
Fig.
14
:
Assignment of the
sensor contacts, sender
WSU26-3
Note

WARNING

SICK WEU26-3 Specifications

General

Brand	SICK
Model	WEU26-3
Category	Security Sensors
Language	English