5
SICK WSU 26/2 – WEU 26/2
8 008 692/9-12-99 Technical Description · WSU/WEU 26-2 © SICK AG · Safety Systems · Germany · All rights reserved
4 Possible Areas of Application
4.1 Possible Areas
of Application
The WSU/WEU provides access
protection for hazardous areas
(
Fig. 3
).
4.2 Application
Conditions
Safe cut-off can only be effected
when the light beam diameter of
23 mm is fully covered.
The protective function of the
WSU/WEU is ensured when the
conditions set out in the adjacent
box are met.
4 Possible Areas of Application and Application Conditions
The power-driven machinery (”PDM”) must be
controllable by electrical means.
The dangerous movement of the machine must be able
to be stopped at any time.
The WSU/WEU must be positioned so that entry into
the hazardous area is only possible by breaking the light
beam.
The
command unit
must be positioned so that it cannot
be activated from the hazardous area.