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How many Ethernet connections (sockets) do the C441 Ethernet modules support?

The C441 Ethernet modules support a maximum of 4 Ethernet connections. That means 4 different Ethernet masters can communicate with the C441 Ethernet modules at the same time, using Modbus TCP and Ethernet/IP commands. The C441 Ethernet modules auto detect the protocol. One limitation, per the Ethernet/IP specification, only one Ethernet master can be used to control the C441 Ethernet modules at a time. This is for safety reasons and to protect the motor.