Contact Us
Add:Room 205, Hengtai Business Building, No.3, Tangkeng Road East,Guantian Community,Shiyan Town, Bao’an District, Shenzhen, Guangdong, China

Name:RS232/422/485 Fiber Modem(Desktop Tpye)

Product Description


This device is based on FPGA, which supports asynchronous RS-232/422/485 communication interface Fiber Modem. The device is the best choice of connecting to the remote terminal unit (RTU) to a host (HOST) or a distributed data acquisition system (SCADA) controllers, with very high performance price ratio. Using ordinary multi-mode fiber, effective communication distance is up to 4KM, while using ordinary single-mode fiber, effective communication distance up to more than 40KM. 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 to communication device under the adverse environment, such as lightning, surges and electromagnetic interference, at the same time it saves investments of the original lightning surge protection devices that using copper .


◆ Based on self -copyright IC 
 Support 3 interfaces RS232,RS422,RS485, you can only use one, cannot use the three interfaces at the  same time
 Can automatically detect and control RS485 data flow without handshake signals to control the flow direction  of data

◆ Have the ability to automatically detect the baud rate of serial port signal

 Automatically test the reason of the device matt is that the device is power off, or E1 line is broken. And then indicate on the LED
 Support SNMP Network Management
 Serial channel can transmit adaptable serial data asynchronously 300 Kbps-921.6Kbps baud rate 

 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



Multi-mode Fiber 

  50/125um, 62.5/125um,

   Maximum transmission distance: 5Km @ 62.5 / 125um single mode fiber, attenuation (3dbm/km)Wave Length: 820nm

  Transmitting power: -12dBm (Min) ~-9dBm (Max)

  Receiver sensitivity: -28dBm (Min)

  Link budget: 16dBm

Single-mode Fiber

  8/125um, 9/125um

  Maximum transmission distance: 40Km

  Transmission distance: 40Km @ 9 / 125um single mode fiber, attenuation (0.35dbm/km)

  Wave Length: 1310nm

  Transmitting power: -9dBm (Min) ~-8dBm (Max)

  Receiver sensitivity: -27dBm (Min)

  Link budget: 18dBm

Serial interface 


    EIA/TIA-232 RS-232 (ITU-T V.28)

    EIA/TIA-422 RS-422 (ITU-T V.11)

    EIA/TIA-485 RS-485 (ISO/IEC8284)

    Serial Interface

    RS-422: TXD+, TXD-, RXD+, RXD-, Signal Ground

    RS-485 4 wires: TXD+, TXD-, RXD+, RXD-, Signal Ground

    RS-485 2 wires: Data+(Correspond TX+), Data-(Correspond TX-), Signal Ground

    RS-232: RXD, TXD, Signal Ground


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

    Power consumption: ≤10W


    Product Size:         103X93X28mm(WXDXH)                

    Simple packaging:   200X176X55mm(WXDXH)

    Piece Weight :      1.2KG

Working environment

    Working temperature: -10°C ~ 50°C
    Working Humidity:        5%~95 % (no condensation)

    Storage temperature:   -40°C ~ 80°C
    Storage Humidity:         5%~95 % (no condensation)