Chapter 6 Operating Instructions
WSU/WEU263
28 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 8013338/YTA4/2016-03-24
Subject to change without notice
Commissioning
6.2 Test notes
6.2.1 Tests before the initial commissioning
Check the protective device as described below and in accordance with the applicable
standards and regulations.
To ensure the correct function, check as described in chapter 6.2.2 “Daily functional
checks of the protective device”.
Number of sender and receiver must match, the distance between them must comply
with the operating range stated in the technical specifications.
It must only be possible to access the hazardous area through the light path between
sender and receiver.
It must not be possible to climb over, to crawl beneath or to circumnavigate the
protective device.
Additionally, check the effectiveness of the protective device mounted to the machine,
using all selectable operating modes as specified in the checklist (see chapter 11.2
“Checklist for the manufacturer”). Use this checklist as a reference before
commissioning the system for the first time.
Ensure that the operating personnel of the machine protected by the WSU/WEU26@3
devices are correctly instructed by qualified safety personnel before being allowed to
operate the machine. Instructing the operating personnel is the responsibility of the
machine owner.
6.2.2 Daily functional checks of the protective device
The effectiveness of the protective device must be checked daily or prior to the start of
work by a specialist or by authorised personnel, using the correct test rod.
Testing the light path between sender and receiver:
Completely cover each light beam with a test rod that is not transparent to light (at
least 30 mm diameter) at the following positions:
• immediately in front of the sender,
• in the middle between sender and receiver (or between the deflector mirrors),
• immediately in front of the receiver,
• on the use of deflector mirrors, immediately before and after the deflection.
This must produce the following result:
• The red diagnostics LED must illuminate on the receiver for the related single-beam
photoelectric safety switch
and
• as long as the light beam is interrupted, it must not be possible to initiate the
dangerous state.
Do not operate the machine if during the test the green diagnostics LED on the receiver
is lit!
If the green diagnostics LED on the receiver lights up during the test even for a short
period, work must stop at the machine. In this case the installation of the WSU/WEU26@3
devices must be checked by qualified safety personnel.
WARNING
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