Operating Instructions
Chapter
3
miniTwin2
8013482/YT85/2016-02-23
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
13
Subject to change without notice
Product description
3.2.2
Operating principle safety light curtain
Between these two Twin Sticks is the protective field, defined by the protective field height
and the protective field width.
The construction size determines the
protective field height
of the appropriate system. For
the exact protective field height, please see Fig. 47 in section 9.3 “Dimensional drawings”
on page 68.
The
protective field width
is derived from the dimension of the light path between the Twin
Sticks and must not exceed the maximum permissible protective field width (see chapter 9
“Technical specifications” on page 64).
The two Twin Sticks automatically synchronise themselves optically. Each Twin Stick has
an OSSD and a so-called multifunction connection. The OSSDs are integrated into the
machine controller. It is possible to connect either a reset button or external device
monitoring (EDM) to the multifunction connections.
Prerequisites for the protective function of the miniTwin2 safety light curtain
The miniTwin2 safety light curtain operates correctly as a protective device only if the
following conditions are met:
The control of the machine must be electrical.
It must be possible to achieve a safe state on the machine at any time.
The miniTwin2 safety light curtain must be mounted in such a way that objects
penetrating into the hazardous area are safely identified.
The reset button must be fitted outside the hazardous area such that it cannot be
operated by a person working inside the hazardous area. When operating the reset
button, the operator must have full visual command of the hazardous area.
The statutory and local rules and regulations must be observed when installing and
using the device.
Fig. 2: Operating principle
miniTwin2 safety light curtain
E.g. reset button
Protective field width
OSSD1
OSSD2
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E.g. EDM
