A schematic diagram refers to a specific type of circuit structure that utilizes standard electrical/electronic symbols rather than images to demonstrate the way the circuit (or portion of it) works. Below is a typical 3-wire motor controller circuit utilizing a normal momentary stop - start pushbutton channel using a schematic diagram. (Momentary here means the button/switch you activate will go back to its default position once you physically let go of it, usually by a spring that forces the button/switch to do this.)
Think of it this way; a circuit diagram is any type of diagram which demonstrates the way the circuit functions where the principal goal is that the proper wiring of components and their relationship to each other rather than physical location relative to each other or planning prototypes. However, in some applications classifying diagrams can be hard so choose this as overall advice. I have discovered this is especially true when dealing with much more complex circuits and electronic equipment. I'm going to use a more straightforward but average industrial circuit since these circuit set ups are the exact same, but yet where you can observe how each sort of diagram shows the operation of the circuit in their own manners.
Pictorial schematic diagrams, or graphic circuit diagrams are basically the exact identical thing with exactly the identical purpose, but they use pictures of components within the circuit rather than symbols. Again, here is the identical specific circuit (almost except a controller was inserted and they're utilizing conductors L1 and L3 rather than L1 and L2.
Right, much less mess? I've got enough information in each of these diagrams to know precisely what this circuit does and also where to look for issues. Hope that this helps. ( Note: do not confuse circuit or schematic diagrams together with wiring diagrams; wiring diagrams will often show images of elements like the pictorial, and also the way the whole or portion of a circuit is wired. The difference is that wiring diagrams generally put an emphasis on actual physical place of necessary elements relative to each individual that essentially tell a layman Just What to do concerning the wiring. )
Here is another schematic diagram demonstrating the identical circuit, connections and components and it appears different but they fall into exactly the identical category.
Following is a technical version of a design diagram known as a ladder structure. The most important aim of this diagram will be to show the logic (referring to electric management ) of a circuit. This really is the one that I mostly come across in my own line of work, and it is very successful for troubleshooting issues or learning how a circuit functions. Some circuits are so enormous that many kinds of schematic diagrams need to be recorded in increments in novel form (typically with coded numbers so that info can be simpler found). Again, here's the identical specific circuit as the first two, however, considering it in ladder shape.