ABB AC 800M

Section 4 Commissioning of PROFIBUS equipment Testing the PROFIBUS bus cable and bus
3BDS009029R5001 B 109
3. One bus termination is not powered (5 V) (or two 390 Ohm resistors are
missing) and one additional bus termination (220 Ohm) placed between the
transmission lines:
– The measured voltage between the both transmission lines is 0,43 V
4. One additional bus termination (220 Ohm) is placed between the transmission
lines:
– The measured voltage between the both transmission lines is 0,79 V