Siemens SIMATIC ET 200SP System Manual page 21

Basic component
Communication module
CM DP
Interface module for
PROFINET IO
Interface module for
PROFIBUS DP
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF
Function
The communication module CM DP
Connects the CPU with PROFIBUS DP
•
The bus connection is an RS485 interface
•
The interface module:
Can be used as IO device on
•
PROFINET IO
Links the ET 200SP with the IO controller
•
Exchanges data with the I/O modules via
•
the backplane bus.
The interface module:
Can be used as DP slave on PROFIBUS
•
DP
Links the ET 200SP with the DP master
•
Exchanges data with the I/O modules via
•
the backplane bus.
System overview
2.4 Components
Figure
21