Safety devices
Pilz safety controller
Pilz safety controllers (PSS 4000 family) handle machine safety logic for robot cells to the ratings called out in your risk assessment. The PSS 4000 can run safety and standard automation in one project, or it can sit as a dedicated safety layer beside a general-purpose PLC. Both patterns are valid and both show up in modern robot cells.
The Pilz PSS 4000 platform handles E-stop, guard door, light curtain, and safety scanner logic for robot cells. It publishes to the robot controller and cell PLC over safe fieldbus, so category ratings hold through the whole safety chain. Wire up e-stop relays, a SICK safety scanner, or other Pilz safe devices as your risk assessment requires.
Two architectures are common in the field. In one, the PSS 4000 runs the cell's safety logic and its standard automation from a single project, cutting the parts count and unifying the tag name. In the other, the PSS 4000 sits as a dedicated safety layer beside a general-purpose PLC, keeping safety and process code owned by separate teams.
Choose the combined approach when the cell is small to medium and one controls team owns everything end to end. Choose the separate safety layer when plant standards, vendor preferences, or team boundaries require isolated safety code. Either pattern satisfies the standards when engineered correctly, so pick the one your team can support long term.
Related integrations
Common questions
- What does Pilz safety controller do?
- Pilz safety controllers (PSS 4000 family) handle machine safety logic for robot cells to the ratings called out in your risk assessment. The PSS 4000 can run safety and standard automation in one project, or it can sit as a dedicated safety layer beside a general-purpose PLC. Both patterns are valid and both show up in modern robot cells.
- What does Pilz safety controller work with?
- It works with SICK safety scanner, Banner light curtain, E stop relays, CIP Safety fieldbus.
- What should I watch for with Pilz safety controller?
- Combined safety-and-automation projects need engineers trained on the PSS 4000 toolchain, not just standard IEC 61131 PLC work.. A separate safety layer adds hardware and cabinet space, but keeps safety logic isolated for teams that require it by policy.. Confirm that the safe fieldbus (PROFIsafe, FSoE, or similar) matches the robot controller and any other [safety PLC integration](integrations:safety-plc-integration) on the line..