Due to the installation location of the various electrical components to form a complete automatic control system, must be divided into components. The principle of the division of components is:

(1) is similar components together;

(2) minimize the number of connections between the components placed in the control of electrical wiring close to the same components;

(3) the strength of electrical controller separation, to reduce interference;

(4) strive neat appearance, Dimensions, weight similar electrical appliances together;

(5) To facilitate inspection and debugging, often need to adjust, maintain, and vulnerable components together.

Between the divided components while addressing the components of the connection between the electrical box and electrical box and the control device: the wiring between the various parts and components of the electrical control equipment generally should follow the following principles:

(1) electrical switches, control panel inlet and outlet is generally connected to a terminal head or wiring nose according to current size, and inlet and outlet number to use different specifications of the terminal head or wiring nose;

(2) electrical cabinet (box), control box, cabinet (Taiwan), as well as between them and control equipment, terminal blocks or industrial couplings to connect;

(3) weak control components, printed circuit board assembly should be used all types of standard connectors connection;

(4) electrical cabinet (box), the connection between the components within the control box, cabinet (Taiwan), can borrow the terminal blocks of the component itself is directly connected to the transition cable should be used to connect terminal block transition ends should be used specifications terminals.