Intrinsically safe connection unit with a network interface, intrinsically safe appliance and network interface for it

摘要

Intrinsically safe connection unit with a network interface for intrinsically safe appliances in explosion-risk areas, having a housing 14, a voltage supply connection 12, plug connection 11 for connecting an intrinsically safe appliance via a transmission cable, and a decoupling circuit. For allowing even a multiplicity of network subscribers to be connected in the explosion-risk area with less wiring complexity, a plurality of plug connections 11A, 11B of the same type are provided as network interface, each being preceded by a separate decoupling circuit, and the voltage supply connection 12 builds a central feed connection with separate supply cores 13A, 13B, 13C for each plug connection 11A, 11B, 11C, each having at least two plug contacts 21 for data communication and at least two plug contacts 22 for supplying power to the connectable appliances via the transmission cable. The invention relates also to a Controller and a network interface for use therewith.