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TCF-142 Series

RS-232/422/485 to fiber converters

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Features and Benefits

  • Ring and point-to-point transmission
  • Extends RS-232/422/485 transmission up to 40 km with single-mode (TCF-142-S) or 5 km with multi-mode (TCF-142-M)
  • Decreases signal interference
  • Protects against electrical interference and chemical corrosion
  • Supports baudrates up to 921.6 kbps
  • Wide-temperature models available for -40 to 75°C environments


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  • moxa-ce-certification-logo-image.png | Moxa
  • moxa-fcc-certification-logo-image.png | Moxa
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The TCF-142 media converters are equipped with a multiple interface circuit that can handle RS-232 or RS-422/485 serial interfaces and multi-mode or single-mode fiber. TCF-142 converters are used to extend serial transmission up to 5 km (TCF-142-M with multi-mode fiber) or up to 40 km (TCF-142-S with single-mode fiber). The TCF-142 converters can be configured to convert either RS-232 signals, or RS-422/485 signals, but not both at the same time.

Automatic Baudrate Detection

The TCF-142 converters can automatically detect the serial baudrate, which is an extremely convenient feature. Even if a device’s baudrate is changed, the signal will still be transmitted through the media converter without any data loss.

Ring Operation

The TCF-142 converters can be used to connect serial devices to a fiber ring. To form the ring, connect the Tx port of one TCF-142 to the Rx port of a neighboring converter. Once the ring is set up, simply use the DIP switches to configure the TCF-142 converters for ring mode. When one node transmits a signal, the signal travels around the ring until it returns back to the transmitting unit, which then blocks the signal. With the TCF-142, you can set up fiber rings that have a total circumference of up to 100 km.

Automatic Data Direction Control

Automatic Data Direction Control (ADDC) is a hardware data flow solution developed by Moxa to handle RS-485 data direction control. ADDC senses and controls RS-485 data direction automatically, making it unnecessary to use the handshaking signal.

  • No. of Ports


  • Serial Standards


  • Baudrate

    50 bps to 921.6 kbps (supports non-standard baudrates)

  • Flow Control

    ADDC (automatic data direction control) for RS-485

  • Optical Fiber

  • Optical Fiber

  • Pull High/Low Resistor for RS-485

    1 kilo-ohm, 150 kilo-ohms

  • RS-485 Data Direction Control

    ADDC (automatic data direction control)

  • Terminator for RS-485

    N/A, 120 ohms, 120 kilo-ohms

  • Connector

    7-pin terminal block

  • Latency

    300 ns

  • RS-232

    TxD, RxD, GND

  • RS-422

    Tx+, Tx-, Rx+, Rx-, GND

  • RS-485-4w

    Tx+, Tx-, Rx+, Rx-, GND

  • RS-485-2w

    Data+, Data-, GND

  • No. of Power Inputs


  • Input Current

    70 to 140 mA @ 12 to 48 VDC

  • Input Voltage

    12 to 48 VDC

  • Overload Current Protection


  • Power Connector

    Terminal block

  • Power Consumption

    70 to 140 mA @ 12 to 48 VDC

  • Reverse Polarity Protection


  • IP Rating


  • Housing


  • Dimensions (with ears)

    90 x 100 x 22 mm (3.54 x 3.94 x 0.87 in)

  • Dimensions (without ears)

    67 x 100 x 22 mm (2.64 x 3.94 x 0.87 in)

  • Weight

    320 g (0.71 lb)

  • Installation

    Wall mounting

  • Operating Temperature

    Standard Models: 0 to 60°C (32 to 140°F)
    Wide Temp. Models: -40 to 75°C (-40 to 167°F)

  • Storage Temperature (package included)

    -40 to 85°C (-40 to 185°F)

  • Ambient Relative Humidity

    5 to 95% (non-condensing)

  • EMC

    EN 55032/35

  • EMI

    CISPR 32, FCC Part 15B Class A

  • EMS

    IEC 61000-4-2 ESD: Contact: 4 kV; Air: 8 kV
    IEC 61000-4-3 RS: 80 MHz to 1 GHz: 10 V/m
    IEC 61000-4-4 EFT: Power: 1 kV
    IEC 61000-4-5 Surge: Power: 1 kV
    IEC 61000-4-6 CS: 3 V
    IEC 61000-4-8 PFMF

  • Environmental Testing

    IEC 60068-2-1
    IEC 60068-2-2
    IEC 60068-2-3

  • Safety

    UL 60950-1

  • Vibration

    IEC 60068-2-6

  • Time

    780,480 hrs

  • Standards

    Telcordia (Bellcore), GB

Support Documents

Name Type Version Release Date
Datasheet for TCF-142 Series
1.4 MB
Datasheet v1.4 Jan 04, 2023 Jan 04, 2023
QIG for TCF-142 Series
788.7 KB
QIG v16.1 May 06, 2021 May 06, 2021
2D CAD for TCF-142-SC TOP
123.4 KB
2D CAD May 20, 2016 May 20, 2016

Available Models (8)

Show Images
moxa-tcf-142-m-sc-image.jpg | MoxaTCF-142-M-SCmoxa-tcf-142-s-sc-image.jpg | MoxaTCF-142-S-SCmoxa-tcf-142-m-sc-t-image.jpg | MoxaTCF-142-M-SC-Tmoxa-tcf-142-s-sc-t-image.jpg | MoxaTCF-142-S-SC-T
Operating Temp.0 to 60°C0 to 60°C-40 to 75°C-40 to 75°C
Fiber Module TypeMulti-mode SCSingle-mode SCMulti-mode SCSingle-mode SC
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moxa-tcf-142-m-st-t-image.jpg | MoxaTCF-142-M-ST-Tmoxa-tcf-142-s-st-t-image.jpg | MoxaTCF-142-S-ST-Tmoxa-tcf-142-m-st-image.jpg | MoxaTCF-142-M-STmoxa-tcf-142-s-st-image.jpg | MoxaTCF-142-S-ST
Operating Temp.-40 to 75°C-40 to 75°C0 to 60°C0 to 60°C
Fiber Module TypeMulti-mode STSingle-mode STMulti-mode STSingle-mode ST
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