Pepperl+Fuchs VAA-2E-G4-SN Instruction Manual page 21

The following function devices can be used in this application while
operating the AS-Interface safety slave on a safety monitor of types VAS-
1A-K12-U or VAS-2A-K12-U to meet the requirements of Category 4:
Warning
• Connection of two functionally dependent SN proximity switches of
Category 3/S:
Since a short-circuit between the proximity switch circuits cannot
always be detected, they must not be connected by a common
multiwire cable, unless a cross-circuit between the two proximity switch
inputs can be excluded by protected wire laying or similar means.
Subject to reasonable modifications due to technical advances.
Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
Two-channel positively driven
Two-channel dependent
The function device"
not
be used.
3.1
L+1
3.3
L-1
Separation
4.3
L+2
4.1
L-2
Safety circuit
Assignment of the connections
two-channel independent" must
+
Channel 1
+
Channel 2
Copyright Pepperl+Fuchs, Printed in Germany
VAA-2E-G4-SN
21