Siemens managed switch, 6AG1105-3AA10-4AA0, draws 0.1 A at 24 V DC, supports 10/100 Mbit/s, ring redundancy, CLI, SNMP v1, web-based management, port mirroring, RMON. IP20 protection class requires cabinet installation. Package dimensions 217 x 156.5 x 69 mm support wall mounting, and connections use 6-pole plug-in terminal blocks.
No gigabit here, so if your backbone is 1 Gbit/s, plan accordingly. Otherwise, the feature set (DHCP client, BOOTP, TFTP, FTP, HTTP, Telnet, SNMP, RMON, port mirroring, trap-by-email) covers most industrial automation networks.