CAMBRIDGE, UK The PSR-FSP safety relay from Phoenix Contact has been specifically harmonized to operate with fail-safe controls (F-PLC) in process technologies.
The unit meets all of the requirements for use in applications up to SIL 3 according to IEC 61508. The coupling relay has a positively driven safety relay whose contacts have an optimized opening behaviour when faults occur.
The specific requirements of a fail-safe control are taken into account using the integrated test pulse filter to extend the lifetime as well as a control circuit to adapt the current drawn. The safe coupling relay is 17.5-mm wide, it comes with an NO and a signalling contact that can be externally connected.
Maximum switched current of the NO contact is 5A, with a 5x20-mm standard fuse externally accessible to protect the load contact. Wiring is simplified using pluggable and coded screw or spring cage terminals.