RS-232 to Multi-Mode Fiber Converter

Extends RS-232 Using Multi-mode Fiber Optic Cable- Industrial Rated (-40 to +75C)

  • Converts RS232 to Multi-Mode fiber
  • Bi-directional
  • 9-Pin DTE pinout for RS232
  • Compact Size: 1" x 2.5" x 3"
  • Uses customer supplied DC power or AC adapter
  • 12, 24, or 48 VDC, 120 VAC power supply options
  • Wide Temperature Rated -40 to +85 C
  • 2 Km typical distance, -34.4 dBm Receive Sensitivity
  • Provides noise and ground loop immunity for serial circuits
Download a printable data sheet
 Fiber Optic Line Driver


The DCB RS232 to Multi-Mode fiber optic converter is a compact, serial copper to fiber converter. The converter is externally powered, available in a 12, 24, or 48 VDC and 120 VAC versions. All of these units are wide industrial temperature rated.

The unit bidirectionally converts RS232 to Multi-Mode fiber. The small stand alone box is easily mounted in a 19" rack with four units per 1U shelf bracket, or more commonly mounted using DIN rail clips.

Typical application is from one RS232 device to another RS232 device over Multi-Mode fiber. Typical performance is -34.4 dbM receive sensitivity, 2 km distance with 62.5/125 fiber cable. Control leads are not passed through or converted.

On the interface converter, the green connector is DC power, the 9-pin connector is RS232. Pin 2 is Receive Data, data into the adapter; pin 3 is Transmit Data, data out of the adapter; and pin 5 is Signal Ground. Pin 7, RTS, has a positive voltage out of the unit and not otherwise used. These pins are identical to those on a 9-pin PC interface. All the other pins on the 9-pin connector are ignored.

Several interface cable adapters are available for connecting the unit to other devices using RJ-45 UTP cable or standard RS-232 connector cables.



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Item Number Description Price Buy Now!
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9902091 Rack mount for up to four units $ 75 Qty:
9902090 Optional DIN rail mounting clip $ 5 Qty:

Data Comm for Business Inc.
2949 County Road 1000 E
Dewey, Il 61840
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