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Operation
6.8 Communication via PROFIBUS DP
PROFIBUS connection
The PROFIBUS is connected by means of a 9-pin SUB D socket (X126). The connections
are electrically isolated.
Table 6- 27
X126 - PROFIBUS connection
Pin
Signal name
1
SHIELD
2
M24_SERV
3
RxD/TxD-P
4
CNTR-P
5
DGND
6
VP
7
P24_SERV
8
RxD/TxD-N
9
-
Connectors
The cables must be connected via PROFIBUS connectors as they contain the necessary
terminating resistors.
The figure below shows suitable PROFIBUS connectors with/without a PG/PC connector.
350
Meaning
Ground connection
Power supply for teleservice, ground
Receive / transmit data P (B/B')
Control signal
PROFIBUS data reference potential (C/C')
Supply voltage plus
Power supply for teleservice P, + (24 V)
Receive / transmit data N (A/A')
Not assigned
PROFIBUS connector
without PG/PC connection
6ES7972-0BA42-0XA0
Range
0 V
RS485
TTL
5 V ± 10%
24 V (20.4 ... 28.8 V)
RS485
PROFIBUS connector
with PG/PC connection
6ES7972-0BB42-0XA0
Operating Instructions, 12/2018, A5E36652151A
Enclosed Drives
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