Selectron DDC711

  • Product Name:​ Selectron (by Selectron Systems AG / ABB group heritage) DDC711 Function Bus Coupler
  • Product Introduction:​ A bus coupler module belonging to the Selectron Selecontrol MAS distributed I/O and function bus system, used to connect local I/O modules (DDC/DIO/AIC etc.) to the central PMC CPU or function bus backbone. Acts as the interface between the field I/O slice modules and the higher-level control network.
Category:
Description
  • Technical Specifications:
    • Part Number:​ 44120080 (common alternate ref.)
    • Function:​ Function Bus Coupler / Interface Module
    • Supply Voltage:​ 24 V DC (typical, from backplane)
    • Current Consumption:​ Approx. 0.5 A @ 24 V DC
    • Power Dissipation:​ ≤ 2.5 W
    • System Compatibility:​ Selectron PMC22, MAS I/O stations
    • Bus Type:​ Selectron proprietary function bus / parallel I/O bus
    • Operating Temp.:​ 0 °C to +55 °C
    • Mounting:​ Snap-in to Selectron I/O rack / DIN rail subrack
    • Dimensions:​ Approx. 127 × 102 × 152 mm (module form factor)
    • Indicators:​ Module status LED (Run / Error / Bus Active)
  • Functional Features:​ Automatic address detection of attached I/O slices; galvanic isolation between bus and I/O side; hot-swap capable in some configurations; diagnostic LEDs for bus communication status.
  • Applications:​ Railway signaling systems, tunnel ventilation control, industrial process automation using Selectron MAS/PMC PLC platforms.
  • Installation & Notes:​ Verify firmware revision matches the PMC CPU. Ensure 24 V DC supply is stable and fused separately. When replacing, retain terminal wiring; re-download configuration if node address changed.
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