TCF-90 Series

TCF-90 Series

Port-powered RS-232 to fiber converters

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.

Manual (1)
Name Action
Comparison Chart for Serial to Fiber Media Converters
TCF-90 Series Datasheet
Name Action
TCF-90-M/S User's Manual


  • 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

Ordering info

Available Models
Model No. Description
TCF-90-M Port-powered RS-232 to multi-mode optical fiber converter with ST connector for 5 km transmission
TCF-90-S Port-powered RS-232 to single-mode optical fiber converter with ST connector for 40 km transmission
Optional Accessories
Model No. Description
CBL-F9M9-20 DB9 male to DB9 female RS-232 cable (20 cm)

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