20735369 LM-BK Bus coupler for coupling 2 bus supplies (bus domains). The bus coupler transmits bus telegrams from one bus domain into the other in both directions. Bus short circuits are recognized and not transmitted. Mains connection, output side: 2 bus connections. Connections are made by means of screw terminals. Switch cabinet case of flame-resistant polycarbonate, halogen-free, intended for mounting on 35mm top-hat rail conforming to EN 50022, permissible ambient temperature from 0 to +50°C, protection type IP20, dimensions: 140 x 90 x 59 mm, 8 modules at 17.5 mm.