Siemens 7KM9300-0AE01-0AA0 Switch

The Siemens 7KM9300-0AE01-0AA0 is a plug-in Switched Ethernet PROFINET expansion module that adds two-port Ethernet switching to compatible Siemens PAC systems, including PAC3200, PAC4200, and the 3VA COM100/800 family. It provides two RJ45 sockets for local switching and supports PROFINET IO and Modbus TCP traffic, enabling edge-of-network segmentation and streamlined device communication without an external switch. Powered from the host PAC module, it mounts in the expansion slot of the PAC3200/4200 series and communicates via the PROFINET/Modbus TCP protocol stack. Key specifications include a maximum insulation voltage of 500 V AC and compact dimensions of 43 mm (width) × 63 mm (height) × 227 mm (depth). Siemens notes a successor model, 7KM9300-0AE02-0AA0, and this variant was cancelled on 1 February 2022, marking it as a legacy part. Typical uses include integrating a two-port switched Ethernet path within a PROFINET network for field devices and controllers, reducing cable runs, and enabling direct Modbus TCP connectivity for compatible peripherals in factory automation environments.