Operating Instructions Chapter 2
WSU/WEU263
8013338/YTA4/2016-03-24 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 7
Subject to change without notice
On safety
2 On safety
T
his chapter deals with your own safety and the safety of the equipment operators.
Please read this chapter carefully before working with the WSU/WEU26@3 devices or with
the machine protected by the WSU/WEU26@3 devices.
2.1 Qualified safety personnel
The WSU/WEU26@3 devices must be mounted, commissioned and serviced only by
qualified safety personnel. Qualified safety personnel are defined as persons who
have undergone the appropriate technical training
and
who have been instructed by the responsible machine operator in the operation of the
machine and the current valid safety guidelines
and
who have access to these operating instructions.
2.2 Applications of the device
The WSU/WEU26@3 devices are electro-sensitive protective equipment (ESPE), type 4 in
accordance with IEC 61496-1 and IEC 61496-2 and may for this reason be used in
controllers of safety category 4 in accordance with EN ISO 13849, SILCL3 in accordance
with EN 62061 or up to PL e in accordance with EN ISO 13849. The WSU/WEU26@3
devices are used for:
hazardous area protection,
access protection.
The photoelectric switch must be installed such that the hazardous area can only be
reached by interrupting the light path between sender and receiver. It must not be possible
to start the plant/system as long as personnel are within the hazardous area.
The WSU/WEU26-3 devices are intended only for use in industrial environments. When
used in residential areas it can cause radio interferences.
Please refer chapter 3.4 on page 13 for an illustration of the protection mode and an
example application.
Only use the WSU/WEU263 devices as an indirect protective measure!
Opto-electronic protective devices as the WSU/WEU26@3 devices cannot provide any
protection against parts thrown out or against radiation. Transparent objects are not
detected.
Depending on the application, mechanical protective devices may be required in addition
to the WSU/WEU26@3 devices.
WARNING
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