An arrangement of plug-in assemblies with a circuit board, the width of which corresponds to the minimum width preferred by the mounting system, or a whole multiple thereof, with a plug-in connector element (for example a spring bar) or with several plug connector elements disposed one after the other in the longitudinal direction, the lengths of which are adjusted to the minimum width of a circuit board, characterized in that a first rail is fixed on the side of the plug-in connectors opposite the plug side the fixing being carried out repeatedly in each case and the rail extending over the entire width of the circuit board, because a second rail (angular rail) is fixed to the edge of the circuit board facing the plug side, this fixing being made with a wing and whose rail has in the free wing recesses to receive test sockets, and because in the free wing it is fixed perp endicularly to the plane of the circuit board a closing plate whose length is approximately equal to the width of the circuit board including the distance to a group that is above or below and whose width is to the distance between two nearby construction groups. (Machine-translation by Google Translate, not legally binding)
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