Note that symbols are discussed in detail later).ĭashed lines indicate a single purchased component. It is also common for a control cabinet to supply a higher voltage to other equipment, such as motors.Īn example of a wiring diagram for a motor controller is shown in Figure 1.
110Vac is common in North America, and 220 V AC Is common in Europe and the Commonwealth countries. This power must be dropped down to a lower voltage level for the controls and DC power supplies. Control cabinets are often supplied with single phase AC at 220/440/550V, or two phase AC at 220/440V AC, or three phase AC at 330/550V.
A control system of a PLC panel will normally use AC and DC power at different voltage levels.
