E1-RS485 Converter

    This interface converter is based on FPGA, providing one E1 interface and one RS485 serial interface, 1Channel RS485 transmission via 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. Serial interface communication rate is up to 921.6KBPS.

●Based on self -copyright  IC
●Can automatically detect and control RS-485 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
●Provide 2 impedances: 75 Ohm unbalance and 120 Ohm balance;
●Support SNMP Network Management
●Serial channel can transmit adaptable serial data asynchronously 300 Kbps-921.6Kbps baud rate
●Serial data multiplexing in E1 support ITU-T R.111 jumping coding mode
●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

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-485 RS-485 (ISO/IEC8284)
Serial Interface
RS-485 4 wires: TXD+, TXD-, RXD+, RXD-, Signal Ground
RS-485 2 wires: Data+(Correspond TX+), Data-（Correspond TX-）, 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)