Cod: RD300-OF - Nombre: RD300-OF


RD300-OF Universal serial RS232/RS422/RS485 to multimode optic fiber media converter (2 ST type connectors )

Using fiber optic enables to use a higher communication bandwidth while offering a total immunity against EMI/RFI interferences and an increased security as well.

Características destacadas

  • 3 in 1 built-in serial interface : RS232/RS422/RS485
  • Serial link up to 2 Mbps for RS422 & RS485 mode, 1 Mbps for RS232 mode
  • Reliable error free communication even in case of EMI/RFI pertubations
  • Fiber length up to 5000 m (100/140 µm fiber type), ST type connectors
  • Automatic RS485 line turn-around, software independent
  • Half-duplex & Full-duplex bidirectionnal data transmission
  • Activity LED for fiber and copper TxD & RxD signals, error LED in case of fiber breakdown
  • Wide DC power range, from +9VDC to +36VDC
  • Point to point mode
  • 15 KV ESD protection and HF filtering on the copper side
  • Robust & compact metal case, CE standards, 35 mm Din Rail mounting
    Conversion   Serial RS232/RS422/RS485 to multimode fiber optic, RS485 mode self line turnaround    
    Serial speed   2Mbps for RS422/RS485 mode, 1Mbps for RS232 mode    
    Distance   5000m with a 100/140 µm fiber type at 25°C    
    Serial protocols   The device supports any kind of communication protocols (Modbus, Unitelway, Profibus, DH+ and any ASCII or binary serial protocols ...)    
    Configuration   Serial link parameters auto configuration, no switches. Line polarization, termination and selection between RS232/RS422/RS485 modes are configurable by mini-switches.    
    Serial connectors   Pluggable screw-in terminal, TxD & RxD signal for RS232 mode, TxA, RxA, TxB, RxB for RS422 mode, TRxA & TRxB for RS485 mode    
    Optic fiber   50/125 µm, 62.5/125 µm, 100/140 µm, 820 nm wave length, selectable ON/OFF state of the fiber light at the idle state.    
    Power budget   22.4 dB, 5 dB & 11 dB attenuator for short distance communication    
    Fiber connectors   2 ST connectors    
    Network topologies   Point to point, ring    
    Signaling   2 LEDs Tx/Rx for copper 2 LEDs Tx/Rx for fiber optic n°1 1 LED for fiber n°1 breakdown 1 LED for power    
    Fan-out   31 RS485 interfaces, 10 RS422 interfaces     
    Input load   Input load 1/8 UL in RS485 mode     
    EMI/RFI protection   Built-in continuous line surge protection, ESD protection (15 KVeff), HF filtering    
    Isolation   Infinite galvanic isolation through the optic fiber    
    CEM   NF EN 55022 emission, NF EN 61000-6-2 immunity    
    Security   Fiber breakdown self diagnostic, failure is reported on a LED and a relay contact (MOSFET) is activated.    
    Power supply   +9VDC to +36VDC (pluggable screw-in terminal), 2.1W    
    Environment   Temperature from -5°C to +65°C, storage -40°C to +80°C, relative humidity from 0 to 95% RH without condensation    
    Dimensions, weight   107 mm (L) x 88 mm (l) x 25 mm (H), 260 g    

Using fiber optic enables to use a higher communication bandwidth while offering a total immunity against EMI/RFI interferences and an increased security as well.


The optical fibre still offers other advantages : use without risk in an explosive environment, no EMC emission, no ground loops, immunity against lightning and high voltage environments, they are finally lighter, less cumbersome, inert and corrosion resistant ...


Plug & Play: RD300 features a self configuration mechanism based on a CPLD component that frees you from the tiresome operation which consists in the serial parameters setup, product is "Plug & Play".


RD300 features in standard a built-in system to control the fiber integrity, it reports automatically any failure with an error LED and also setups a relay contact (MOSFET) to activate any external safety device.


Its small size, design features and its great adaptability make the RD300 a really universal product capable to satisfy to major needs of the industry.



Point to point topology

This configuration enables to control a single equipment installed in a very polluted or distant area. The optical line is totally insensitive to EMI/RFI perturbations.

Simple ring topology

This topology enables to build a simple ring whereas the master equipment is installed in the middle.

Ordering information
    RD300-OF   Serial RS232/RS422/RS485 to multimode fiber optic media converter, +9VDC to +36VDC power supply, din rail mounting    
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