Due to the various electrical components are mounted in different positions, in the form a complete automatic control system, it must be divided components.
Partitioning assembly principle is:
1 functionally similar element are combined together.
2 let the strength of electrical controller separation, in order to reduce interference.
3 as much as possible to reduce the number of components of the connection between the wiring, while the close control of electrical appliances in the same assembly.
4 for ease of inspection and adjustment, the frequent adjustment, maintenance and vulnerable components together.
5 to provide neat appearance, the dimensions, weight similar appliances together