The D5294 is a relay module suitable for switching safety related circuits, up to SIL 3 level, for high risk industries. It provides isolation between input and output contacts. It makes available 2+2 NO relay contacts connected in parallel and then in series to avoid spurious trip and to increase process availability. High process availability SIL 3 Safety Function for both Normally Energized (NE) and Normally De-energized (ND) / F&G loads is available. Load can be isolated from supply on both polarities. 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. Line and load short/open circuit detection 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 and it is also reported by opening the fault output. Diagnostic parameters are programmable and can also be monitored/configured through Modbus.
FEATURES
- SIL 3 / SC 3 for NE/ND loads with NE/ND driver
- SIL 2 / SC 3 for FAULT OUTPUTS
- Installation in Zone 2/Div. 2
- Up to 5 A functional / 6 A inrush current
- Load disconnection on both supply lines available
- High process availability to avoid spurious trips
- Compatible with DCS/PLC pulse testing
- Line and Load short/open circuit detection
- Load voltage monitoring
- Earth leakage monitoring
- Internal coil integrity monitoring
- Field fault mirroring to the PLC DO
- Modbus RTU RS-485 for monitor & configuration
- Service contact available
- Input/Output/Supply isolation
