Multi-protocol RS232/422/485 Data Transceiver featuring Self-Healing Ring Operation

FDX72SHR Series

Example of Multi-protocol RS232/422/485 Data Transceiver featuring Self-Healing Ring Operation

Availability: Worldwide
The FDX72SHR 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 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 FDX72SHR 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 to implement a fully self-healing ring.

Features for FDX72SHR 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
  • Only one optical fiber 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 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
  • 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.
  • Lifetime Warranty
  • ComFit standard form factor is designed for wall, surface, rack, or DIN rail mount installations (using optional card cage or DIN mounting bracket).

FDX72SHR Series Application Diagram(s) (1)

Application Diagram(s) for FDX72SHR Series

FDX72SHR Series Ordering Information

Part NumberDescription
FDX72M1SHRUniversal Data Self Healing Ring. Lifetime Warranty.
FDX72S1SHRUniversal Data Self Healing Ring. Lifetime Warranty.