Ci-EF110/120 Series

Memobus Fiber Optic Converter

Provide 1 Memobus bus interface, communication rate up to 4Mbps
Support 1~2 Fiber Optic Ports, ST connector ( SC, FC Optional)
Support fiber link monitoring and alarm function
Dual redundant power input with 1500V high voltage isolation
IP40 protection, Metal case, 35mm DIN-Rail Mounting
DIP switches is used to enable 120 Ohm termination resistor
Support -40~75℃ wide operating temperature range
Overview Specifications Models Resources

Overview of Memobus Fiber Optic Converter

Ci-EF110/120 series is designed for industrial serial to fiber converter which supports transparent transmission for Memobus protocol. This series provides a fiber converter solution to extend transmission distance up to 2KM over multi-mode fiber or 20KM over single-mode fiber. It secures data transmission over EMI resistant fiber at speeds up to 4Mbps.

Ci-EF120 supports one bus data interface and two cascaded optical fiber interface. The dual fiber inputs allow connecting multiple devices in a cascade or Daisy-chain topology for fiber redundancy.
Additionally, this series converter provides a fiber link monitoring function to detect the communication errors on both sides of the fiber connection. When a communication error occurs, a red LED status indicator will turn on and the alarm relay contact on the terminal block will activate.

Hardware adopts DIN rail mounting, IP40 metal case, wide temperature and voltage design and has passed rigorous industrial standard tests, which can suit for the industrial scene environment with harsh requirements for EMC. It can be widely used in various situations like industrial control, process control, traffic control and intelligent residential district, and particularly applicable to bank, electricity, departments and systems that have special requirements relating to electromagnetic interference environment.

Specifications of Memobus Fiber Optic Converter

Serial Port
      Memobus Fieldbus 5-pin industrial terminal connection
        RS-485 supports A, B half duplex mode, Baud Rates: 0~4Mbps
        120 ohm termination resistor, use corresponding switch to make it to be enable

 Fiber Port

            Wave length: multi-mode 850nm/1310 nm;  single mode 1310 nm/1550nm
            Fiber type: multi-mode 50/125um, 62.5/125um, 100/140um; single mode 8.3/125 um, 9/125um, 10/125um
            Transmission distance: multi-mode 2km, single mode 20km
            Fiber interface type: ST/SC/FC (optional); ST (standard configuration)
              Single Fiber wavelength:
              A: Transmit wavelength is single mode 1310nm, then Receive wavelength is 1550nm
              B: Transmit wavelength is single mode 1550nm, then Receive wavelength is 1310nm

    Power Supply
    DC (18~36V) dual redundant power input (can be customized with 9~18VDC)
    Industrial standard voltage DC 24V, consumption is less than 1.5W
          DC 1500V voltage isolation and reverse connect protection
          5.08mm industrial terminal port
        Relay: Fiber link fault alarm
      Contact rating: 1A @24V DC, Industrial Terminal port
        Dimensions (H×D×W): 136mm×104.8mm×52.8mm
        Weight: 800g
        Casing: IP40 protection, wave grain aluminum reinforce case option
        Installation: Wall mounting or DIN rail mounting
        Operating Temperature:-40℃~75℃(-40℃~85℃ optional)
        Storage Temperature: -40℃~85℃
      Ambient Relative Humidity: 5%~95%(non-condensing)
      5 years

    Models of Memobus Fiber Optic Converter

    Available Models

    100M Fiber Port

    Fiber Mode / Distance



    Multi-Mode / 2KM



     Multi-Mode / 2KM



    Single mode / 20KM



    Single mode / 20KM





      Ci-EF110_120 Series Datasheet 



      Ci-EF110_120 Series Quick Installation Guide