Siemens SIDOOR ATD4 W Series System Manual page 121

Figure 4-12
Figure 4-13
* Two 1-channel sensors can also be connected as an alternative.
ATD4xxW for industrial applications
System Manual, 06/2022, A5E51901827B AA
Connect the switchgear to the change-over contact, 2-channel nonequivalent
Connect the switchgear to two separate non-equivalent change-over contacts, 2-channel
non-equivalent*
SIDOOR functions
4.4 Safety functions
119