A modular system provides teachers with the best tool for developing training courses related to both logics and pneumatics/electro-pneumatics control techniques. It is a flexible system composed of a vertical frame where the modules are easily inserted for the execution and/or the demonstration of the pneumatic circuits; it also allows obtaining several sequential cycles, by following standard techniques and procedures. Pneumatic connections are performed by means of pipes and fast release joints; electric connections are  through 2 mm. cables, since the electric devices and components (sensors, coils, relays, etc.)  need a low power consumption and, therefore, the supply voltage can be low and safe (24Vdc). The standard symbols of the different components are clearly shown on the modules, to facilitate the connection of both the air pipes and the electric cables, besides explaining the function of each component.