6GK5991-2VA00-8AA2 - Siemens
BA 2xRJ45VD HA, bus adapter VVD (Variable Distance), for Ethernet- communication via 2-, 4- or 8-wire-copper cables, 2xRJ45 sockets for industrial Ethernet and PROFINET, extended temperature range -40 °C...+70 °C, conformal coating, installation altitude up to 4000m, distances up to 2 wire up to 1000 m at 10 Mbit/s 2 wire up to 100 m at 100 Mbit/s 4 wire...