Industrial switch for RING topology with 2x SFP slot, 8x Fast Ethernet port with PoE, support UPOE, POH, 802.3af/at/bt, PoE limits: max. 270W for the whole switch / 170W for ports 1-4 or 5-8 and max. 95W per port, maximum total poE power drawn over all ports is 270W, surge protectors FE ports 1000A, 2x DI with support for balanced loops, 1x programmable NO/NC RELAY output, 2x RS485 / 1x RS422 BUS (support for MODBUS modules, TCP server, UDP mode), USB port for local management, redundant power input, surge protection on all inputs, EVENT MANAGEMENT: SMTP, TCP events, ETH events, HTTP client (camera control), 8x IPWatchdog.... , operating temperature –40...+70°C, VLAN, QoS, IGMP, SNMPv2/v3, SNTP, installation on flat substrate or DIN35, 12VDC/24VDC/48VDC/12VAC/24VAC/56VDC