The X1-NIS-RLO/SS-04 solid-state relay module is suitable for switching safety related circuits, up to SIL 3 level, for high risk industries. It provides isolation between input coils and output contacts, making available a safety NO contact for Normally Energized (NE) loads. A wide compatibility towards different DCS/PLC is guaranteed: driving pulse testing is permitted by a dedicated internal circuit, which prevents contact and LED flickering, while offering an acceptable resistance to the DO Card. Line and load short/open circuit detection with programmable limits and load voltage monitoring are provided, both when the load is off and when the load is on. The fault in the field is directly mirrored to the PLC DO by artificially increasing the input impedance without commuting the relay contacts, and it is also reported to the cumulative fault. To ease maintenance operations, field devices can be disconnected through a two-position insertion/extraction mechanism. This product requires a dedicated Termination Board.
FEATURES
- SIL 3 / SC 3
- Installation in Zone 2 / Division 2
- Loop disconnection to ease maintenance operations
- Up to 2 A functional / 6 A inrush current
- Compatible with DCS/PLC pulse testing
- Load disconnection on both supply lines available
- Line & Load short/open circuit detection (programmable thresholds)
- Load voltage monitoring
- Field fault mirroring to the DCS/PLC DO Card
- Automatic TProof test available through Gateway
- Three port isolation, Input/Output/Supply
