Siemens SIMATIC ET 200SP - Page 26

System overview
3.4 Components
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ
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Basic component
Function
Figure
Communication module
CM DP
The communication module CM DP
• Connects the CPU with PROFIBUS DP
• The bus connection is an RS485 interface
Interface module for
PROFINET IO
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.
Interface module for
PROFIBUS DP
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.