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8 007 487/ 10-10-99 Technical Description • LGT © SICK AG • Safety Systems • Germany • All rights reserved
3 System structure
The LGT Safety Light Grid com-
prises
‡
Control unit LGTN
‡
Sender LGTS and
‡
Receiver LGTE
as well as the two connecting leads
to the control unit (
Fig. 5).
4 Functions
3 System structure
Two sender and receiver units can
be connected to a LGTN control
unit.
If two sender units and two
receiver units are operated in paral-
lel the protective field height can be
doubled (
Fig. 6).
Fig. 6. Two LGT safety light grid on a LGTN control unit: Double protective field height.
LGTN
2 x LGTS
2 x LGTE
max. 1800 mm
LGTN
LGTS
LGTE
LGTN
Terminals for
sender and receiver
Fig. 5. LGT Safety Light Grid comprising a control unit LGTN, sender LGTS, receiver LGTE
and the two connecting leads to the control unit
The height of the protective field
depends on the size of the system
used.
The sender and receiver units of
the LGT contain a series of indi-
vidual elements which together
form a light grid of parallel beams.
If only one light beam is inter-
rupted, a switching command is
triggered which stops the machine.