Connecting up / commissioning
5.3 Replacing a module without a programming device
CM 1542-5
Manual, 11/2014, C79000-G8976-C290-02
21
PROFIBUS interface
The table below shows the terminal assignment of the PROFIBUS interface. The assignment
corresponds to the standard assignment of RS485 interface.
Table 5- 1
Terminal assignment PROFIBUS interface
View
Signal name
Designation
1
-
-
2
-
-
3
RxD/TxD-P Data line B
4
RTS
Request To Send
5
M5V2
Data reference potential (from station)
6
P5V2
Supply plus (from station)
7
-
-
8
RxD/TxD-N Data line A
9
-
-
Note
PROFIBUS interface
The CM provides no 24 VDC power supply on the PROFIBUS interface. I/O devices (for
example, PC adapter 6ES7972-0CB20-0XA0) are therefore not operational on the interface).
5.3
Replacing a module without a programming device
General procedure
The configuration data of the CM is stored on the CPU. This means that this module can be
replaced by a module of the same type (identical article number) without using a PG.
