ABB S800 I/O Manual page 31

Section 3 Configuration
Table 2
3BSE020926-600
shows the fieldbus connection assignments.
Table 2. FCI PROFIBUS Connections
Pin Designation
1 Shield
2 -
3 RxD/TxD-P
4 RTS
5 DGND
6 VP
7 -
8 RxD/TxD-N
9 DGND
PROFIBUS Connection
Description
Shield/protective ground
Not used
Receive/Transmit data - plus
Direction control (optional)
Data ground
Supply voltage for the
terminating resistors
Not used
Receive/Transmit data -
minus
Data ground (if RTS is used)
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