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  • Based on self -copyright IC
  • Support 3 line RS232 (TXD,RXD,GND), support for flow control CD,DSR,CTS
  • Have three Loop Back Mode: E1 interface Loop Back (ANA)、RS232/485/422 interface Loop  Back(DIG)、Command the remote RS232/485/422 interface Loop Back(REM)
  • RS232/RS485/RS422 supports hot-plug, supports DTE or DCE device interconnection
  • RS232/RS485/RS422 channel can transmit adaptable serial data asynchronously 0Kbps-14400bps baud  rate
  • Have pseudo random code test function, easily line opened, can be used as a 2M BER Tester
  • 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
  • Provide 2 impedances: 75 Ohm unbalance and 120 Ohm balance;
  • It can form E1 serial converter (A) — E1 fiber optic Modem (B) — fiber serial Modem (C) topology
  • AC 220V, DC-48V, DC+24V, DC Power and Polarity-Free
  • E1 interface 

Interface Standard:                       comply with protocol G.703;

Interface Rate:                              2048Kbps±50ppm;

Interface Code:                                      HDB3;

Impedance:                                             75Ω (unbalance), 120Ω (balance);

Jitter tolerance:                                      In accord with protocol G.742 and G.823

Allowed Attenuation:           0~6dBm

  • 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

  • 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)



Functional Description

E1-31 Channel RS232/RS422/RS485 Converter

Port Description

One E1 Interface, 31 Data Interface


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

Power consumption: ≤10W


Product Size: 485X138X44mm (WXDXH)




E1 to 31 port / channel RS232 | RS-485 | RS-422 converter / multiplexer, AC, DC or Double power supply options


This interface converter is based on FPGA, providing 31Channel RS232/485/422 transmission on E1 interface. The product breaks through contradictions between traditional serial interface communication distance and communication rate, besides, it also can solve electromagnetic interference, ground ring interference and lightning damage. The device greatly improves reliability, security and confidentiality of data communication. It is widely used for various industrial control, process control and traffic control occasions, especially for Bank, and Power and other sectors and systems which have special requirements of electromagnetic interference environment. RS232/RS485/RS422 channel can transmit adaptable serial data asynchronously 0Kbps-14400bps baud rate.