W&T connects
Interfaces for TCP/IP, Ethernet, RS-232, RS-485, USB, 20mA, glass and plastic fiber optic cable, http, SNMP, OPC, Modbus TCP, I/O digital, I/O analog, ISA, PCI
Data sheet:

Interface - plastic fiber optic <> RS232 with DB9 socket Low Power

  • Plastic fiber optic cable 81029

Low Power version for distances < 20 meters

Interface model 81029 transmits serial RS232 data iva plastic duplex fiber optics cable over a distance of up to 20 meters. The converter is powered from the serial port and needs no additional power supply.



  • RS232 Interface
    • 9-pin SUB-D socket
  • Fiber optics interface
    • Direct connection of the fiber optic cable without a connector
    • Alternate names: POF (polymer optical fiber, plastic optical fiber)

Management and connectivity:

  • Version with reduced power consumption
  • Transmission length 0 to 20 meters. Greater distances are possible using the 81009 model.
  • The interface is very easy to install:
    • Cut the fiber-optic cable with a sharp knife at right angles.
    • Insert into patented adapter of the W&T interface.
    • Plug the adapter into the PC.
    • That’s it!
  • No re-configuration of transmission parameters required
  • 100% protection against interfering radiation
  • Electrical isolation
  • Lightning protection

Power supply:

  • No additional power source required

Standards & more

  • Conforms to standards both in office and industrial environments:
    • High noise resistance per EN 61000-6-2
    • Low noise emission per EN 55032:2015 + A1 Cl. B, EN 61000-3-2 & EN 61000-3-3
  • 5 year guarantee

Worth knowing

The model 81029 Interface offers in addition to the other fiber optic compact interfaces a 9-pin special version whose transmission range is limited to 0 to 20m, but which only loads the connected RS232 interface with a current of about 2mA. With this version it is also possible to operate on less powerful RS232 interfaces without connecting an additional power source.

Technical data

Connections and displays:

  • Serial port:
    • RS232 Interface
    • 9-pin SUB-D female, ready to connect to a PC
  • Fiber-optic cable adapter:
    • socket with automatic interlocking of the fiber-optic cable
  • Baud rate:
    • 110..115,200 baud
  • Data format:
    • any format
  • Supported signals:
    • RxD, TxD
  • Maximum distance:
    • typ. 20 meters of fiber optic cable
  • Power supply:
    • through the RS232 signals
  • Fiber-optic medium:
    • Duplex plastic optical fiber cable
    • Dimensions 2.2 x 4.4mm
    • with a fiber diameter of 1mm
    • Material: core: PMMA, cladding: PE
  • Wavelength:
    • approx. 660nm

Housing and other data:

  • Housing:
    • SUB-D adapter housing
  • Enclosure rating:
    • IP40
  • Weight:
    • approx. 30g
  • Ambient temperature:
    • Storage: -40..+70°C
    • Operation: 0..+50°C
  • Scope of delivery:
    • Plastic optical fiber cable <> RS232 interface, 9-pin for PC


*Net unit price for
commercial users
  • FO-Accessories

    • Duplex plastic fiber optic cable, sold by the meter
      (Unfortunately, this article cannot be ordered as a sample.)
    • 81100
    • 3.50€
    • Duplex plastic fiber optic, cable reel 500m
      (Unfortunately, this article cannot be ordered as a sample.)
    • 81500
    • 778.00€
    • Cutting tool for plastic fiber optic cable
      (This article cannot be ordered as a sample. So that you can assess the cut quality we will be glad to provide you on request with an optical fiber cable which has been trimmed using the cutting tool. )
    • 81600
    • 438.00€
    • Replacement cutter for cutting tool 81600
      (Unfortunately, this article cannot be ordered as a sample.)
    • 81602
    • 168.00€

* Our offering is intended only for commercial users. We will be happy to refer private end customers to trading partners through whom our products can be purchased.