
Chapter 5. About the SI7 I/O Driver 65
Supported Communication Modules
The SI7 driver supports the following communication modules in an S7-300 or S7-
400 PLC:
• For Profibus communication on an S7-300 PLC:
• A CP342-5 communication module
• A CP343-5 communication module
• The Integrated Profibus-DP port on the CPU
• For Profibus communication on an S7-400 PLC:
• A CP443-5 Basic communication module
• A CP443-4 Extended communication module
• The Integrated Profibus-DP port on the CPU
• For Industrial Ethernet communication on an S7-300 PLC:
• A CP343-1 communication module
• A CP343-1 IT communication module
• For Industrial Ethernet communication on an S7-400 PLC or S7-400-H:
• A CP443-1 communication module (two modules are required for
redundancy on the S7-400-H)
• For an MPI node on a Profibus network using an S7-300 or S7-400 PLC:
• The MPI port on the CPU
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