Fiber optic cable, function - GF82.00-P-4000-04AB

The fiber optical cable is a transfer medium in which the signal is transmitted by means of modulated light. The basis material used for the fiber optical cable is plastic with a fiber diameter of approx. 1 mm. A reflection layer in the core enables light signals to be transmitted between several control units. Each integrated control unit can transmit and receive signals and data. Located at the input and output of the fiber optical cable is an optoelectronic converter. The source device converts electrical signals into light signals and sends them via the fiber optical cable to the target device. Once at the target device they are converted back to electrical signals again.

The light for the data transfer in the MOST has a wavelength of 650 nm (unit: nanometer). By way of comparison: visible light lies in a range of blue with 400 nm to red with 800 nm.

Optical attenuation of the light signal may occur in the fiber optical cable. The attenuation is dependent on:

• the length of the line between the components
• bending radius when routing (minimum bending radius 25 mm).
• the condition of the insulation of the fiber optical cable (mechanical damage, pinching).
• Passive connectors:

  These are used when a component is removed from the MOST because it has failed.

In order to assure the functional availability of the remaining components, the ring can be closed again with the passive connector.