Electrical Installation - SICK WSU26-2 Instrucciones De Servicio

Chapter 4
4

Electrical installation

Note
WARNING
WARNING
8 008 631/P134/20-12-04 © SICK AG • Safety Systems • Germany • All rights reserved
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Electrical Installation
Electrical connections must be made appropriate to device op-
tion (see Connection Schematics in the Appendix). With device-
connector options, pay attention to the coding denoted. It must
match the coding of the cable socket, thus preventing connec-
tion to an unsuitable version (other supply voltage, other ran-
ge).
Both contacts at the test input of the sender unit must be clo-
sed during operation. Testing (open for min. 75 ms and close
again) should be done with an uninterrupted light beam. This
causes the output relay to de-energize.
Switch off power!
Electrical connection of the WSU/WEU or modification may only
be carried out with power removed.
To connect the WSU/WEU with a PG thread, the housing lid
must be unscrewed.
Use both normally-open contacts!
At least two outputs must be connected to the control unit of
the machine being protected (Figs. 4, 5, 7, 9, Appendix). An
electromagnetic contact element (relay) must be connected to
each of the two outputs (normally-open contacts).
Operating Instructions
WSU/WEU 26/2