The modular small controllers PNOZmulti 2 are flexible and can be adapted to your requirements, plus they also fit into the smallest control cabinet. At a minimal width of just

For your automation project there is a large selection of I/O modules for safety-related, non-safety-related, digital and analogue signal processing. When individual changes are made to the system at a later date,

The Pilz PNOZ X series relays are well-regarded for their reliability, flexibility, and comprehensive safety features. They are suitable for a wide range of industrial applications where safety is paramount,

This suggests a control box or station that includes a PITreader Key, likely for access control or authorization purposes. It could involve a key-operated switch or a reader for authentication.