Siemens SIMATIC NET PROFIBUS manual Receiver, Attenuation

Configuring Networks

Receiver

The receiver of a digital optical transmission system consists of an optoelectric converter (a photodiode), that converts the optical signals to electrical signals and a signal converter that converts the electrical pulses received from the diode into signals compatible with the connected electronics.

Attenuation

The attenuation of the transmission path is determined by the following factors:

SThe choice of optical fiber

SThe wavelength of the transmit diodes

SThe type of connector

SWith glass optical fibers, the number of splices (including repair splices)

SThe length of the optical fiber (cable length)

SThe link power margin on the link (for example for aging and temperature dependency of the LEDs and photodiodes).

PROFIBUS Networks SIMATIC NET	3-13
6GK1970-5CA20-0AA1 Release 2 05/2000