VAA-2E-G4-SN
Assignment of the connections
Dat
e
of
is
sue
20.
05.
2005
17
Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
Fuchs Group • Tel.: G49 621 776-0 • USA +1 330 4253555 • Sin65 67799091 • Internet http://www.pepperl-fuchs.com
6
Assignment of the connections
6.1
General information
The attachable Emergency Stop or position switches must be
implemented as normally closed contacts. Interfaces in accordance with
the SN specification (Fuchs) are provided for the safety sensors.
The slave contains two redundantly structured input channels that are
independent of each other.
6.2
Connection examples
The following system requirements must be fulfilled to achieve a safety
category:
Category 2
Testing
• Connection of two independent mechanical switches of Category 2:
Since a short-circuit over the switch is not detected, the switches and
safety slaves must be tested regularly. The test intervals must be
adapted to the application. There are no special requirements for
cables or switches.
Channel 1
Channel 2
1.1
S+1
1.3
S-1
2.1
S-2
2.3
S+2
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AA-2E-G4-SN
