Industrial switch for ring topology with 2x SFP slot, 1x GE port, 4x Fast Ethernet ports with PoE, Supports UPOE, POH, 802.3af/at/bt, max. 95W on a port, the maximum total power consumption of PoE through all ports is 170W, Overvoltage protections on FE ports 1000A, 2x DI supporting balanced loops, 1x programmable NO/NC relay output, 2x RS485 / 1x RS422 BUS (MIOS support modules, TCP server, UDP mode), USB port for local management, Redundant power input, Overvoltage protections, EVENT MANAGEMENT: SMTP, TCP events, ETH events, HTTP client (camera control), 8x IP Watchdogs ....-40...+70°C, VLAN, QoS , IGMP, SNMPv2/v3, SNTP, installation on flat surface or DIN35, 12VDC/24VDC/48VDC/12VAC/24VAC/56VDC