4.3.5. The pushbuttons

With the pushbuttons we come up alongside the sensors. We will put a separate layer in the drawing for them as well. The first layer that we add is the one for the voltage-free pushbuttons. They are pushbuttons of any brand that do not contain electronic components, and which are connected to an input module of the integrated home system.

Figure 10: Operating points with pushbuttons at the door, next to the bed and the window.

In the master bedroom we have drawn four operating points. An operating point is defined here as a place where one or more pushbuttons are installed under the same cover plate. We have drawn three pushbuttons for each of them in the above drawing, but that is of no consequence here. As an integrated home system is flexible, it may be that today we decide that three pushbuttons will be put at the door, but tomorrow we decide on four or only two. So as not to have to change our drawing each time (work time), we always use the same symbol for an operating point. How many pushbuttons are at a certain operating point, and what function they will have, will not be shown in the drawing but later on in a spreadsheet. At every operating point we also place a code. It can start with the letter “S” for switch for example, followed by a unique number. We could also use “PB” (pushbuttons), but that would mean typing in one more letter and the idea is to save as much work as possible.