Digital output module X1-NIS-DO-02-S

safetyPLCcurrent

SIL3 Digital Output Driver with Diagnostics The Digital Output Driver X1-NIS-DO-02 module is suitable for energizing safety related circuits, up to SIL 3 level, for high risk industries. It can drive solenoid valves, visual or audible alarms to alert a plant operator, or other process control devices from driving signals imposed by the system card. They can also be used as switchable supplies to power measuring or process control equipment. Up to five units can be paralleled together to drive high-current loads. On the system side, a wide compatibility towards different DCS/PLC is guaranteed: driving pulse testing is permitted by a dedicated internal circuit, which prevents spurious activations and LED flickering, while offering an acceptable resistance to the DO Card. Line and load short/open circuit detection 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 changing the output state, 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 - Short-circuit proof - Compatible with DCS/PLC pulse testing - Selectable input impedance (software programmable) - Up to 500 mA (with 5 units in parallel) - Line & Load short/open circuit detection (programmable thresholds) - Field fault mirroring to the DCS/PLC DO Card - Three port isolation, Input/Output/Supply Technical Specifications: General - Power Dissipation: 1.55 W @ 24 Vdc with 100 mA Field Out, 24 Vdc System In (HRES), typical. System Supply - Voltage: 24 Vdc nom (18 to 30 Vdc). - Current Consumption: 145 mA, @ 24 Vdc with 100 mA Field Out, typical. System In - Type: 24 Vdc nom (18 to 30 Vdc). - Current Consumption: 12 mA @ 24 Vdc, typical. - Input impedance: 2 kΩ, typical. Field Out - Output voltage range: 20 V to 23 V. - Max working current: 100 mA up to 60 °C (200 mA with two units in parallel, 300 mA with three units, 400 mA with four units, 500 mA with five units). Linear derating per unit between 100 mA (60 °C) down to 70 mA (70 °C). - Short circuit current: 125 mA, typical, folded-back to 50 mA. - Response time: 50 ms. Fault - Type: Load & line short/open circuit. - Line/load fault: programmable resistance (20 Ω to 20 kΩ), current (1 mA to 40 mA) and voltage (100 mV to 24 V) limits. - Fault signalling: common fault & fault mirroring on DCS/PLC DO. - Response time: ≤ 1 s. Isolation - Test Voltage: Field Out/System In 2.5 kV; Field Out/System Supply 2.5 kV; System In/System Supply 500 V. Environmental conditions - Operating temperature: –40 to +70 °C. - Storage temperature: –45 to +80 °C. Mounting - Type: On custom Termination Board. - Weight: about 50 g. - Dimensions: Width 10 mm, Depth 80 mm, Height 120 mm. Channels: 1