Siemens SIMATIC ET 200AL System Manual page 57

Inverted Y-cable
The inverted Y-cable enables the connection of fail-safe inputs and a fail-safe output to an I/O
device (for example a Siemens SIRIUS safety position switch with interlock) with only one
cable.
You can find details about connection in the respective user manual of the product.
Figure 5-12 Inverted Y-cable
The following figure shows the wiring of the Y-cables.
Figure 5-13
Sealing of unused sockets
To ensure IP65 or IP67 degree of protection, seal off all unused sockets with sealing caps.
Article numbers for accessories/spare parts.
You will find the article numbers in the Appendix in section Accessories/spare parts
(Page 114).
Distributed I/O system
System Manual, 08/2021, A5E31861578-AJ
Y-cable 6ES7194-6KC00-0XA0
Connecting
5.7 Wiring
55