The pro for connections to S5 PLCs ACCON-S5-LAN is a connection adaptor between a PC and a S5 PLC via TCP/IP. It is fed by the PLC's interface, an external power supply is not necessary.
S5 adaptor with USB Connection. The ACCON-COM-Cable USB is an adaptor to connect a PC with a S5 PLC. It is fed via USB. Therefore, an external power supply is not necessary.