NORSTAT Safety Relays - Handbuch (Seite 72)

application guide safety relays from riese electronic page 68
Single channel application for two wire safety
mats with opposite polarity between channels
For this application a RS-NAGAO is needed. The
version 24V AC/DC cannot be used for safety-
mats.
In this application two connections per channel
are each connected to one of the terminals of the
safety-mat. Terminals S11-X1/S22 and S12-PE
are connected.
The function is like the application with four wire
safety mats.
Suitable up to category 1; SIL1; PLc reachable
Æ
It must be guaranteed that the safety-mat
or safety contact edge -during load with standard
weight- does not have a resistance higher than
1
Ω
K12 X2 S11
S22
X1/ 33 S12 PE 13 23 41
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