Siemens Communication Processors: Choosing a CP 343 or CP 443 for Your S7-300 or S7-400

Which communication processor you need depends on the network. Here is how to choose.

Communication processors add Ethernet or PROFIBUS connections to S7-300 and S7-400 controllers. Pick the wrong one and the network will not run.

Start with the network

  • Ethernet or PROFIBUS?
  • Which protocols: S7 communication, TCP, FMS or others?

Match the controller family

CP 343 modules are for the S7-300; CP 443 modules are for the S7-400. They are not interchangeable.

Examples

Explore our Simatic NET range or send us the order number of the module you want to replace.

Have Used or Surplus Gear? We Buy Equipment Direct. Get a Free Valuation