Control components are used in a wide variety of applications with varying degrees of complexity. One example of a simple control circuit is a circuit that turns a light on and off. In this circuit, the control component is often a single-pole switch.
Control circuits used in commercial and industrial applications tend to be more complex than this simple circuit and employ a broader variety of components.
A simple on-off lighting control circuit illustrates an example of manual control. Manual control requires someone to use a switch to turn something on or off. The device being turned on or off may be a light, as in the previous example.
However, many other devices are also controlled manually. For example, a manual starter can be used to start and stop a motor.
While manual control of machines is still common practice, many machines are started and stopped automatically or by some combination of manual and automatic control. Automatic control occurs when circuits can turn something on and off without human interaction.
A wide variety of components are used in control circuits. This includes components that vary in complexity from indicator lights to advanced systems that monitor, protect, and control AC motors. In some cases, the interaction of these components is dependent only on how they are wired to each other. This is sometimes referred to as hard-wired logic.
The complete range of Siemens control components is too extensive to be fully addressed in this course. However, this course will give you a good start.
|Title:||Basics of Control Components – SIEMENS|
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I want to know which timer will be use to operate a light circuit automaticaly with that timer
Dear sir :
I want to learn electric control circuit any thing for electrical.
Iwant to ask you this is are free or not.
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But my company not give use trannning course
Analog timer most frequently used in lighting.and it is easy to set the timing also.