Siemens SIMATIC ET 200SP System Manual page 26

Basic component
Communication module
CM DP
Interface module for
PROFINET IO
Interface module for
PROFIBUS DP
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ
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
3.4 Components
Figure
25