VAA-2E2A-KE1-S/E2, VAA-2E2A-KE1P-S/E2
Appendix A
1
3
0
8
6
3
2
0
1
9
-0
4
21
Example 2:
If a dangerous failure (short circuit) of the switch cannot be excluded, two dependent
mechanical switches must be used for each channel. To detect a dangerous accumulation of
faults, the safety function must be tested. The test intervals must be adapted to the application.
Figure 6.6
The following function blocks can be parameterized to achieve safety category 4 in this
application during operation of the AS-Interface safety module on a safety monitor (e.g., VAS-
1A-K12 or VAS-2A-K12):
Dual-channel, dependent
Dual-channel, force-guided
S+1
S-1
S+2
S-2
Safety circuit
Module
separately
laid
separately
laid
Danger!
The function block
"Dual-channel, independent" must
not
be used.
Warning!
The cable length between the module and the sensor is limited to 300 m.
