ComNet FDX72: RS-232/422/485, Self-Healing-Ring, High Speed, 1Mbps

ComNet FDX72: RS-232/422/485, Self-Healing-Ring, High Speed, 1Mbps

Product Code: CN-FDX72M1SHR / CN-FDX72S1SHR


The ComNet FDX72SHR series self-healing ring transceiver unit is a fully-digital modem designed for implementing RS232, RS422 or RS485 2 or 4-wire data communications networks of the highest possible reliability. A network of these units can support one full-duplex or two half-duplex data channels. These transceivers also feature data translation to convert between data protocols. Data re-clocking and regeneration permit an almost unlimited number of transceiver/controller units to be used within the network. These environmentally hardened transceivers are ideal for use in unconditioned out-of-plant or roadside installations and, unlike many competing designs, only one optical fibre is required between units to implement a fully self-healing ring. Bi-colour indicating LEDs are provided to ascertain equipment operating status, including the location of fibre breaks. Plug-and-play design ensures ease of installation, and no electrical or optical adjustments are ever required.

Product Options

Please add ‘/C’ for Conformally Coated Circuit Boards to extend to condensation conditions – please contact us for pricing and delivery

DIN-rail mounting adaptor plate kit with mounting hardware – please order model CN-DINBKT1 or CN-DINBKT4

  • Meets EIA RS232 and RS422/RS485 (2 or 4-wire) specifications (simplex or duplex operation)
  • Two data channel capability: one full duplex or two half-duplex channels
  • Only one optical fibre required between units for fault tolerant/self-healing ring operation
  • Full data re-clocking and regeneration: no limit to the number of transceiver units used within the network
  • Supports supervised multiple master architecture for unparalleled network reliability
  • Remote fault indication allows the user to determine when a fibre break or loss of prime operating power has occurred, or a transceiver in the field has failed
  • LED status indicators provide rapid indication of all critical operating parameters, including the location of fibre breaks or failed transceivers
  • May be used to provide serial data protocol conversion between nodes (consult factory)
  • Designed to meet full compliance with the environmental requirements (ambient operating temperature, mechanical shock, vibration, humidity with condensation, high-line/low-line voltage conditions and transient voltage protection) of NEMA TS-1/TS-2 and the Caltrans Specification for Traffic Signal Control Equipment.
  • Robust design assures extremely high reliability in unconditioned out-of-plant/roadside environments
  • NTCIP compatible
  • Voltage transient protection on all power and signal input/output lines
  • Wide optical dynamic range: optical attenuators are never required
  • Hot-swappable rack modules
  • Interchangeable between stand-alone or rack mount – ComFit package
  • Units may be DIN-Rail mounted by the addition of ComNet model CN-DINBKT1 or CN-DINBKT4 adapter plate
  • ComNet Lifetime Warranty


DC plug-in power supply, 90-264Vac. 50/60Hz included

Product CodeDescriptionNo. of FibresFibre TypeOptical Power BudgetMax DistanceNo. of Rack Slots
CN-FDX72M1SHRUniversal Data Self Healing Ring1 in / 1 outMultimode 62.5/125?m16dB4 km1
CN-FDX72S1SHRUniversal Data Self Healing Ring1 in / 1 outSinglemode 9/125?m19dB40km1

How to order:

Simply send us a message using the quote form or contact our team direct via the details below!