Optical Fibre Interface, MDRC

Optical Fibre Interface, MDRC

Product code: LL/S1.1
Used to couple two sections of an ABB i-bus line using an optical fibre link in order to bridge longer distances or to avoid having to implement lightning and overvoltage protection when laying cables between buildings.
Price (Excluding GST)


The device is used to couple two sections of an EIB line using optical Fibres in order to bridge greater distances and to reduce the amount of lightning and overvoltage protective equipment when laying cables across buildings. An EIB power supply must be provided for both EIB sections.

Two devices are required to set up a transmission link. These are connected to an existing optical fibre installation by means of a 2 m long patch cable (included with supply). Signals are transmitted by two optical fibres that are suitable for transferring 850nm signals. It is also possible to connect them directly with prefabricated standard cables.

The data flow is displayed separately for the optical fibre input and output using an LED.


Technical Details


  • Rated Voltage: 21...31 V DC, via the bus
  • Connections: 2 x ST socket for optical fibre patch cable (2x50/125mm), 1 x KNX Bus
  • Max Attenuation: in total 14 dB at 850 nm
  • Achievable Section Length: with 50/125mm fibre (4dB/km) ca 3.5km, with 200mm fibre (10dB/km) ca. 1.4km



Brand ABB
Technology KNX
Mounting DIN Rail
Input voltage KNX Bus (29VDC)
IP rating IP20
Mounting Width 4MW
EAN 40 16779 39210
brand ABB

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