Safety engineering
Device modules
Connection of safety sensors
1
1.2
1.2.4
1.2-11
EDS94AYAD EN 2.2
1.2.4.3 Connection of active sensors
The safe sensor input I4A and I4B is suitable for an active sensor.
PN-switched input signals are permissible.
The line monitoring must comply with the requirements of the c ategory 3.
Drive-based safety does not provide for line monitoring.
These errors are detected:
ƒ Non-equivalent input signals after the discrepancy time.
GI
IB
IA
S
M
P
SSP94SM352
Fig. 1.2-5 Functional example of PN-switching sensor
SSensor
P Positive path
M Negative path
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