E1-4 Channel RS232/RS422/RS485 Converter

    This interface converter is based on FPGA, providing 4Channel 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-57600Kbps baud rate.

●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-57600Kbps 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 
Standard
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)