LD-64 Redundant Fiber Ring
The LD-64 can be used to provide a redundant fiber optic ring solution for equipment with RS-232/V.24 or RS-422/485 interfaces. The LD-64 is mostly used in applications were high reliability is required as this unit can still function even if a fiber or a fiber pair are broken. In the event of line failure the LD-64 is equipped with alarm outputs which can be connected to a local I/O device (a PLC) to provide a network alarm. The LD-64 handles transmission rates up to 375 kbit/s. It is available in both multi- and single mode fiber.


  • Multidrop applications with high reliability
  • Redundant ring half duplex communication
  • Withstands harsh environments with severe interference
  • RS-232/V.24 or RS-422/485 interface
  • Protects connected units from lightning/transients
  • Galvanic isolation
  • Alarm indication for line failure
  • Available for multi- and single mode fiber
  • Use to connect equipment on different earth potentials
  • Guarantees reliable long-distance communication