Typical application: - Monitoring of 2nd stage area gas shut-off valves for medical gases Alarm unit SDAL-MED V4 functions: • 4 digital inputs for position valve sensors, type NAMUR or ON/ OFF; • Valve status by light indicators (4 green LEDs = valve open and/ or 4 red LEDs = valve close); • Valve fault indication (green LEDs/ red LEDs alternating) only for NAMUR version • Test button; • Inputs programming operation by dip switches; • Configuration function as base unit or repeater unit; • RS485 local SDAMNet Plus network or Modbus protocol (optional); • Network address programming by dip-switch; • Auxiliary outputs for collective valves open; • Auxiliary outputs for collective valves closed; • 4 independent outputs reproducing the input status (N.C. logic); • Gas labels available: O2, N2O, Med. Air 8 bar, Med. Air 4 bar, Evac. Air, Compr. Air, Air 800, CO2, Vacuum, N2, He
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