Universal Data Drop & Repeat Multi-protocol RS232/422/485 Data Transceiver

FDX72 Series

Example of Universal Data Drop & Repeat Multi-protocol RS232/422/485 Data Transceiver

Availability: Worldwide
The FDX72 Series is being eliminated. Please contact ComNet Customer Care for last time buy information and elimination date.

PDF Datasheet: en  




-40 º to +75 ºC


1 OR 2*


Made in the USA



The ComNet FDX72(M,S)1 series Drop-Insert-Repeat 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 FDX72 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 fiber is required between units. Combine these units with the ComNet FDX70E(A,B)(M,S)1 series products as an end link to create a linear Drop-Insert-Repeat chain.

Features for FDX72 Series

  • 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
  • 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 fiber break or loss of prime operating power has occurred, or a transceiver in the field has failed
  • Status indicating LEDs provide rapid indication of critical operating parameters.
  • May be used to provide serial data protocol conversion between nodes (consult factory)
  • Robust design assures extremely high reliability in unconditioned out-of-plant/roadside environments
  • NTCIP compatible
  • Wide optical dynamic range: optical attenuators are never required
  • Only one optical fiber required between units
  • Lifetime Warranty
  • Voltage transient protection on all power and signal input/output lines provides protection from power surges and other voltage transient events.
  • 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.
  • Standard ComFit models are hot-swappable.
  • ComFit standard form factor is designed for wall, surface, rack, or DIN rail mount installations (using optional card cage or DIN mounting bracket).

FDX72 Series Application Diagram(s) (1)

Application Diagram(s) for FDX72 Series

FDX72 Series Ordering Information

Part NumberDescription
FDX72M1Universal Data Drop & Repeat. Lifetime Warranty.
FDX72S1Universal Data Drop & Repeat. Lifetime Warranty.