RS422/485 Fibre Optic Modem


  • EIA/TIA-422, EIA/TIA-485  Compliant
  • Asynchronous data rates up to 120kbps
  • LED status indicators (power, link and receive)
  • Easy "plug-and-go" installation
  • Supports 4-wire full and half duplex modes
  • DIP switch enabled termination
  • DTE, DCE selection push-button
  • CE & FCC Class A approved


The CSC-4D9 is designed for linking serial RS422/485 devices over fibre optic cabling. They allow the direct connection of 120kbps serial devices via fibre cable links that are electromagnetic, and radio frequency (RFI) and electrical surge immune. CSC-4D9 converters are ideal for industrial process control, surveillance, and other remote access applications with RS422/485 interfaces. These compact stand alone units provide an economic solution for serial to standard multimode fiber conversion.

RS422 RS485 Fibre Optic Modem Application Diagram

Technical Support

Lanode offer free lifetime technical support on all our fibre products. We enjoy speaking to customers and solving problems.  Give us a call on +44 (0) 1276 677 220 to see if we can help.


Item Description

EIA/TIA-422, EIA/TIA- 485


DB-9 for RS422/485
ST for Multimode fibre

Max. Distance

Copper: up to 1200m
Fibre: up to 2000m


Input Voltage: 100 to 240VAC (External power adapter)
Output: 12 VDC 800 mA
Frequency: 60 Hz


Operating Temperature: 0ºC to 50ºC
Storage: Temperature: -20ºC to 70ºC
Relative Humidity: 10% to 80%, non-condensing


FCC Part 15 of Class A & CE approved


109.2 x 73.8 x 23.4mm (L x W x H)



Ordering Information

Order Code Description
CA-CSC-4D9-M2 RS422/485 Fibre Optic Modem - Multimode 2km ST

More Information