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RS485/RS422/RS232 Fiber Modem | Mini Type

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Type : Serial Optical Fiber Modem
Description :

This device is based on FPGA which supports asynchronous RS-232/422/485 communication interface Fiber Modem.


This device is based on FPGA which supports asynchronous RS-232/422/485 communication interface Fiber Modem. The device is the best choice for connecting the remote terminal unit (RTU) to a host (HOST) or a distributed data acquisition system (SCADA) controller with a very high-performance price ratio. Using ordinary multi-mode fiber effective communication distance is up to 2KM while using ordinary single-mode fiber effective communication distance is up to more than 120KM. The serial port communication rate is up to 921.6KBPS.

As a result of the fiber as a transmission medium, you can completely avoid the threat of harsh environments lightning, surges, electromagnetic interference, and other communication devices while eliminating the investment in surge lightning protection devices when the original use of copper.


RS485/RS422/RS232 to Fiber Optic Converter | Mini Type RS485/RS422/RS232 to Fiber Optic Converter | Mini Type


Based on self-copyright IC 

Interface type RS232 / RS485 / RS422 optional, physical interface is plug-free terminal block;

Have the ability to automatically detect the baud rate of the serial port signal, Serial channel can transmit adaptable serial data asynchronously 300-921.6Kbps baud rate ;

RS485 zero delay automatically forwards and discriminates and controls data transmission direction;

RS-485 supports 32-point polling (can be customized for 128 points);

Serial port interface lightning-protection reached IEC61000-4-5 (8/20μS) DM(Differential Mode): 6KV   Impedance (2 Ohm) CM(Common Mode): 6KV Impedance (2 Ohm) standard;

AC 220V, DC-48V, DC+24V, DC Power and Polarity-Free;

Applications: Industrial automation control, access control, card, parking lot, and other systems


● Fiber

Single-mode Fiber/Multi-mode Fiber

Optical port: FC/SC/ST/LC(SFP)

Wave Length:850nm/1310nm Multi-mode;1310nm/1550nm single-mode

No relay transmission distance:0~2Km(Multi mode);20~120Km(single mode)

Transmitting power: 

  single mode 1310/1550nm:≥-9dBm

  Multi-mode 850nm:-18dBm

  Multi-mode 1310nm: -25dBm

Receiver sensitivity:-28dBm~- 40dBm


● Data Interface

Data Interface: RS-485/RS-232/RS-422

Data Format: NRZ、Manchester、Bi-phase

Rate: 110bps-921.6Kbps

Physical interface: plug-free terminal block


● Power

Power:     AC180V ~260V;DC –48V;DC +24V

Power consumption: ≤5W

Dimension:         136*131*31mm (WXDXH)  Mini


● Working environment

Working temperature: -10℃—+60℃

Storage temperature: -40℃—+85℃

Working Humidity: 0%—95%(no condensation)

MTBF: >100,000 hours


Product Item

RS232 422 485 Fiber Modem

Functional Description

A single RS232/422/485 data signal is transmitted directly on the optical fiber at a rate of 0 to 921.6 Kbps, and an external power supply

Port Description

One Fiber interface; One Data Interface




136*131*31mm (WXDXH)  Mini




application of RS485/RS422/RS232 to Fiber Optic Converter

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