Industrial switch for RING topology with 2x SFP slot, 2x Fast Ethernet port with PoE, support UPOE, POH, 802.3af/at/bt, max. 95W per port, maximum total PoE power draw over all ports is 120W, surge protection of FE ports 1000A, 2x DI with balanced loop support, 1x programmable NO/NC RELAY output, 2x RS485 / 1x RS422 BUS (support MODBUS modules, TCP server, UDP mode), USB port for local management, redundant power input, surge protectors at 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