1
3
0
8
6
3
2
0
1
9
-0
4
18
VAA-2E2A-KE1-S/E2, VAA-2E2A-KE1P-S/E2
Appendix A
6
Appendix A
6.1
Application Examples
6.2
Category 2
The safety function(s) must be tested at appropriate intervals of time by the machine control
system. Loss of the safety function will be detected by the test. The test intervals must be
adjusted to match the application.
Connecting two independent mechanical position switches of Category 2:
Figure 6.1
6.3
Category 3
The occurrence of a fault must not lead to the loss of the safety function.
Connection of two dependent mechanical position switches per channel (two safety functions).
Example 1:
Figure 6.2
Note!
The examples listed here correspond to our understanding of the categories in accordance
with ISO 13849-1 and should not be regarded as binding.
Channel 1
Channel 2
Module
S+1
S-1
S+2
S-2
Channel 1
Channel 2
Module
S+1
S-1
S+2
S-2
