ABB AC 800M User Manual page 107

Section 4 Commissioning of PROFIBUS equipment
The following pictures shows the correct installation as well as the common
installation errors. Use an oscilloscope to check the voltage signals on the bus
segment:
1.
The measured voltage between the both transmission lines shall be 1,1 V
Figure 41. Correct terminated PROFIBUS line
3BDS009029R5001 B
A correct PROFIBUS installation:
Testing the PROFIBUS bus cable and bus
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