Abstract: A device for transmitting signals between an automation system and field device comprises a supporting plate and modules which are attachable to said supporting plate. The modules are provided with terminals especially for field devices. The supporting plate has arranged thereon data lines of a local bus and voltage-supply lines. The modules have at least local bus interfaces. The device additionally comprises at least one bus coupling module which is attachable to the supporting plate and which is provided with a local bus interface and a field bus interface for communication with said modules and said automation system.

Abstract: A plug includes at least one plug body having an axial bore, with a cable being insertable into the plug body at the one end of the plug body, and which can be connected to electric contact elements arranged at the second end. The first end has an associated strain relief mechanism including at least two clamping elements adjustably supported for clamping the cable. The plug body also has at least two sliding guides open to the outside in the direction toward the axial bore, in which the clamping elements are movably guided.

Abstract: The invention relates to a device for an inherently safe signal matching of signals being exchanged between an automating system (2) and field devices (3). The device (1) contains input/output modules (4), which can be plugged into a backwall plate (19) and which combine the functions of conventional input/output modules and modules for voltage separation. The backwall plate (19) supports data lines (20) of a local bus (8), as well a current supply lines (21). A communications module (9) is connected on the one hand with the local bus (8), and on the other hand with a field bus (12). The communications module (9) contains device, for memorizing (22) and processing (16) data, and makes possible an asynchronous data exchange between an automating system (2) and the input/output modules (4).