Siemens SIDOOR AT40 System Manual page 102

Controllers
6.3 Safety concept ATD4xxW
Antivalent connection of two redundant, two-channel antivalent sensors to two channels
Two redundant 2-channel antivalent sensors are needed for the signal (1oo2 evaluation)
Image 6-13
The output of the "AND0" block can be directly assigned a drive order or can be assigned
the prioritized STOP door command via an additional negation block. This corresponds to
enabling for the actual drive order. The following example illustrates this:
● Open drive order is activated.
● 2-hand control device inactive → STOP (highest priority)
● 2-hand control device active → STOP is cleared → OPEN becomes active
102
Two-hand control device example
AT40, ATD400V, ATD400K, ATD4xxW, ATD400S, ATE250S, ATD400T
System Manual, 06/2016, A2B00096162-AN