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

摘要

An intrinsically safe connection unit with a network interface for intrinsically safe appliances in explosion-risk areas, having a housing, a voltage supply connection, plug connection 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 of the same type are provided as network interface, each being preceded by a separate decoupling circuit, and the voltage supply connection builds a central feed connection with separate supply cores for each plug connection each having at least two plug contacts for data communication and at least two plug contacts 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.

主权项

1. An intrinsically safe connection unit with a network interface for intrinsically safe appliances in explosion-risk areas, the connection unit comprising:
a housing; a voltage supply connection on the housing and including a central feed connection; at least one plug connection on the housing for connection of a transmission cable for an intrinsically safe appliance to the connection unit; and a decoupling circuit connected upstream of each plug connection and arranged in the housing, each decoupling circuit including a resistance network in each signal path of the decoupling circuit for radio-frequency power limiting, wherein the central feed connection includes separate supply cores for each plug connection, each plug connection including at least two plug contacts for data communication and at least two plug contacts connected to the associated supply cores for supplying power to each appliance via the transmission cable.