Abstract: The invention relates to a system of distribution of a fluid under pressure for a driving device. The system comprises a main distributor D.sub.3 mounted on a base plate E.sub.3, and at least one auxiliary unit such as a progressive starter U.sub.1 or a drain-blocker U.sub.2, wherein the auxiliary unit U.sub.1, U.sub.2 comprises a standard distributor D.sub.1, D.sub.2, advantageously of the same type as the main distributor D.sub.3, which is mounted interchangeably on a specific base plate E.sub.1, E.sub.2 configured to determine the function of the auxiliary unit and associable with the base plate E.sub.3 of the main distributor D.sub.3 and with the base plates of other auxiliary units if any.

Abstract: The invention relates to a method and a pneumatic system which permit the definition of the logic equations of the various sequences of a machine cycle and the assembling of the various components processing said logic equations by juxtaposing them one after another along a same line with automatic setting up of certain interconnections between the components through the medium of the bases supporting said components. Furthermore the structure of said bases permit the juxtaposition on the same line of several functional components such as storage modules and logic modules.