TCF-90 Series

Port-powered RS-232 to fiber converters

Product Features

  • Use either external power or power over serial
  • Extends RS-232 transmission up to: • 40 km with single-mode—TCF-90-S • 5 km with multi-mode—TCF-90-M
  • Reduces signal interference
  • Protects against electrical interference or chemical corrosion
  • Compact size

The TCF-90 is a compact serial media converter that transmits RS-232 signals over optical fiber. Power is derived from either the serial port or an external power source. The TCF-90 extends RS-232 transmission up to 5 km with multi-mode fiber, or up to 40 km with single-mode fiber. A pair of TCF-90 converters can be used to connect two RS-232 devices with optical fiber in full duplex mode. The optical fiber isolates the data signals from dangerous increases in ground potential, ground loops, and electrical EMI/RFI noise, and enhances data security by eliminating the harmful effects of RF radiation and susceptibility to electromagnetic radiation.


  • Comparison Chart for Serial to Fiber Media Converters
  • TCF-90 Series Datasheet

Ordering info

Available Models

Model No.Model Description
TCF-90-MPort-powered RS-232 to multi-mode optical fiber converter with ST connector for 5 km transmission
TCF-90-SPort-powered RS-232 to single-mode optical fiber converter with ST connector for 40 km transmission

Optional Accessories

Model No.Model Description
CBL-F9M9-20DB9 male to DB9 female RS-232 cable (20 cm)
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