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MD-63D/LD-63D/LD-64D
The Westermo D-units are available in MD-63 (point to point), LD-63 (multidrop) and LD-64 (redundant ring) versions. These devices have a 9-pin D-sub connector for connection to equipment with RS-485 interface. The D-units can be set up for different datarates / data formats to support a number of protocols using RS-485 interface with D-sub connector.The fiber cable is completely immune to external interference, which makes it ideal for harsh industrial environments. The units can handle transmission rates up to 1.5 Mbit/s (MD-63 and LD-63) or 375 kbit/s (LD-64) and are available in both multi- and single mode versions.



MD-63D LD-63D LD-64D


  • Point to point / multidrop applications (MD-63, LD-63)
  • Redundant ring communication (LD-64)
  • Withstands harsh environment with severe interference
  • RS-485 interface on 9-position D-sub
  • Protects connected units from lightning/transients
  • Galvanic isolation
  • Alarm indication for line failure (LD-64)
  • Available for multi- and single mode fiber
  • Guarantees reliable long distance communication