Festo MS6-SV Operating Instructions Manual page 47

MS6(N)−SV
Pulsed enable signals (EN1/EN2) for cross−circuit recognition
Cross−circuit recognition by means of clock signals is carried out through the
safety switching device/safety PLC.
Fig. 9
Note
Since the clock outputs of various controller producers are not standardised,
suitability must be checked in each case. If the clock is outside the described
limits, the MS6(N)−SV recognises this as a fault and performs a safe
disconnection.
Festo MS6(N)−SV 0904a English
47