Abstract: The aim of the invention is to reduce the temperature gradient at the connection terminals of a connection unit to which lines can be joined. The inventive temperature compensation element is made of at least one first strip of thermally conducting material on which terminal lugs are arranged in a row at essentially right angles to the strip and are insulted in relation to each other and the strip. The terminal lugs are connected to the strip in a thermally conductive manner and can be respectively contacted to the lines with corresponding contact terminals of the connection unit.

Abstract: The aim of the invention is to reduce the temperature gradient at the connection terminals of a connection unit to which lines can be joined. The inventive temperature compensation element is made of at least one first strip of thermally conducting material on which terminal lugs are arranged in a row at essentially right angles to the strip and are insulted in relation to each other and the strip. The terminal lugs are connected to the strip in a thermally conductive manner and can be respectively contacted to the lines with corresponding contact terminals of the connection unit.

Abstract: A digital input/output unit has a series of terminal points and visual display devices assigned to the terminal points for the display of the respective switching state. It also has an interface for the exchange of process data with a controller and an electronic circuit connected between the interface and the respective terminal points for converting the process data into corresponding switching signals and vice versa. The electronic circuit has an evaluation device for terminal point related signaling data received from the interface in order to activate a respective selected visual display device regardless of the current switching state. Alternatively, or in addition, the electronic circuit can have an evaluation device for a common signaling datum, which can be received from the interface, relative to the complete input/output unit in order to be able to jointly activate all visual display devices regardless of the particular current switching state.