Shenzhen JHA Technology Co., Ltd is one of the leading manufacturers of hardened Ethernet, PoE, and fiber connectivity products specifically designed for harsh and demanding environments.


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E1-RS232/RS422/RS485 Converter JHA-CE1D1/R1/Q1

    • 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 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

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Interface converters

Serial to E1 Converter

PDH/Voice Multiplexer

  • JHA-CE1D1-R1-Q1E1-RS232/RS422/RS485 Converter JHA-CE1D1/R1/Q1


    This interface converter is based on FPGA, providing 1Channel 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 512kbps baud rate.

    Product Photo

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    Mini Type




    ♦ 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)



    Model Model Number: JHA-CE1D1/R1/Q1
    Functional Description E1-RS232/422/485 Converter , provides three interfaces, Used in pairs , Serial port rate up to 512Kbps
    Port Description One E1 interfaces, 1 data interfaces (RS232 / RS485 / RS422)
    Power Power supply: AC180V ~ 260V;DC –48V;DC +24VPower consumption: ≤10W
    Dimension Product Size: 216X140X31mm (WXDXH)
    Weight 1.3KG/piece



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