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PAGE 42 06 Apr 2000 CH. 8: NETWORKS
GFK-1819
Its is necessary to terminate both ends of the network. Both terminations must have power to them to
insure proper operation of the network. The following diagram illustrates the correct connection for the
termination resistors.
RxD/TxD-N 8
DGND 5
V+ 6
RxD/TxD-P 3
RxD/TxD-N 8
DGND 5
V+ 6
RxD/TxD-P 3
RxD/TxD-N 8
DGND 5
V+ 6
RxD/TxD-P 3
Figure 8.5 – Profibus Network Cabling
VP (6)
A-Line (3)
B-Line (8)
GND (5)
Line termination
390 Ohm
220 Ohm
390 Ohm
Figure 8.6 – Profibus termination resistors