STN ATLAS RM401

Product Name:​ STN Atlas Lyngso Marine Relay Output Module
Product Introduction:​ A 24 VDC coil relay module used in STN Atlas ship automation racks to convert PLC/alarm logic into isolated NO / NO-NC contacts for actuators and alarm lamps.
Category:
Description
Technical Specifications:
  • Part No: 271.130 433/D
  • Coil: 24 VDC
  • Contacts: 1 × NO, 1 × NO/NC changeover
  • Load: 2 A DC / 7 A AC at 150 VAC max
  • Mount: DIN or rack slot
  • Temp: -10 to +60 °C
  • Protection: IP20
  • Weight: approx. 150–200 g
    Functional Features:
  • Galvanic isolation between logic and load
  • Plug-in terminal design
  • Suitable for alarm horn, solenoid, breaker trip circuits
    Application Scenarios:​ Engine room monitoring alarm expansion, generator breaker control, ballast valve indication, legacy STN NORD system retrofit.
    Installation Requirements:​ Verify coil polarity on DC version; derate AC load for inductive solenoid by 50%; secure retaining clip.
    Usage Notes:​ Do not use NO/NC contact for 440 VAC motor directly; suppress inductive kick with RC snubber; spare DRM401 cross-compatible in same rack.
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