TCF-142-RM Series

Features and Benefits

  • Extends RS-232/422/485 transmission up to 40 km with single-mode or 5 km with multi-mode
  • 1 or 150 kilo-ohm adjustable pull high/low resistor
  • Supports ring and point-to-point transmission


Download Datasheet

The TCF-142-RM Series slide-in modules are serial-to-fiber converters that work with the TRC-190 chassis. The modules convert from the RS-232, RS-422, or RS-485 signal to a fiber-optic signal.

Automatic Baudrate Detection
The TCF-142-RM Series can automatically detect the serial baudrate. This 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 problem.


Serial Inteface
Connector DB9 female
No. of Ports 2
Serial Standard RS-232, RS-422, RS-485
Flow Control ADDC® (automatic data direction control) for RS-485
Baudrate 50 bps to 921.6 kbps (supports non-standard baudrates)
Optical Fiber
Low-Speed Fiber Module Multi-Mode Single-Mode
Fiber Cable Requirements 50/125 µm, 800 MHz G.652
62.5/125 µm, 500 MHz
Typical Distance 5 km 40 km
Wavelength Typical (nm) 850 1310
TX Range (nm) 840 to 860 1290 to 1330
RX Range (nm) 800 to 900 1100 to 1650
Optical Power TX Range (dBm) 0 to -5 0 to -5
RX Range (dBm) 0 to -20 0 to -25
Link Budget (dB) 15 20
Dispersion Penalty (dB) 1 1
Note: When using a power meter to measure the fiber TX power, set the baudrate to 9,600 bps and send data (00, …, 0h) to the serial converter’s serial port.
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
Serial Signals
RS-422 Tx+, Tx-, Rx+, Rx-, GND
RS-485-4w Tx+, Tx-, Rx+, Rx-, GND
RS-485-2w Data+, Data-, GND
Power Parameters
Input Current 150 mA @ 12 VDC
Overload Current Protection Supported
Power Consumption 150 mA @ 12 VDC
Physical Characteristics
Housing Metal
IP Rating IP30
Dimensions 86.8 x 136.5 x 21 mm (3.42 x 5.37 x 0.83 in)
Weight 105 g (0.23 lb)
Environmental Limits
Operating Temperature 0 to 60°C (32 to 140°F)
Storage Temperature (package included) -20 to 75°C (-4 to 167°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Standard and Cerifications
EMC EN 55032/24
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: 3 V/m
IEC 61000-4-4 EFT: Power: 1 kV; Signal: 0.5 kV
IEC 61000-4-5 Surge: Power: 1 kV; Signal: 0.5 kV
IEC 61000-4-6 CS: 150 kHz to 80 MHz: 3 V/m; Signal: 3 V/m
IEC 61000-4-8 PFMF
Environmental Testing IEC 60068-2-1
IEC 60068-2-2
IEC 60068-2-3
Safety EN 60950-1, IEC 60950-1
Vibration IEC 60068-2-6
Time 514,926 hrs
Standards Telcordia (Bellcore), GB
Warranty Period 5 years
Details See