ABB AC 800M User Manual page 108

Testing the PROFIBUS bus cable and bus connectors
2.
The measured voltage between the both transmission lines is 0,62 V
Figure 42. Incorrect terminated PROFIBUS line (termination only on one side)
108
One bus termination is not powered (5 V) (or two 390 Ohm resistors are
missing):
Section 4 Commissioning of PROFIBUS
3BDS009029R5001 B