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