The F-series FENA-21 is a 2-port Ethernet adapter supporting several communication protocols: PROFINET IO, EtherNet/IP and Modbus TCP. The selection for the protocol is done via a parameter in a drive.
Allen-Bradley 20-750-APS PowerFlex 750 24V DC Auxiliary Power Supply Option Kit for PowerFlex 753/755 Drives with Frames 2-7, can be installed in any option port, but installation in Port 8 is recommended