Terminal is gradually applied to various fields, including signal terminals, power terminals, connecting terminals and so on, which is the connecting end of the circuit..The terminal is the component of the connection between the battery and the outer conductor. In electrical engineering, terminal to terminal, also called terminals are divided into single hole, holes, jacks, hook, from materials, silver plated copper, zinc copper, copper, aluminum, iron and so on.1, terminal wiring diagram of the wiring diagram of the mapping should be in line with the GB6988.6 - 1993 in the control system function chart drawing provisions;2. All terminals and their leads shall be marked in accordance with the electrical schematic and the wiring number. Schematic diagram of the project code, terminal number and wire, respectively, compiled shall comply with the provisions of GB5094-1985 the electric technology in the project code ", GB4026-1992 the connection terminal of electrical equipment and specific wire end of letter recognition and application of digital system of general principles of law and GB4884-1985 the insulated conductor mark" and;3. Different from electrical schematic diagram, each part (contact, coil, etc.) of the same terminal in the terminal block diagram must be drawn together.;4, terminal wiring diagram is drawn by wire drawing. Go line, line and plate plate is divided into a front to go after go line two, commonly used in on line, for simple electrical control components, fewer terminals, connection and is not complex, direct draw element connection; for complex parts, terminal number, wiring complex is generally a slot line, as long as the connection terminals marked connection number, needn't draw the connection between each component;5, terminal wiring diagram should be marked wiring of various wire type, specifications, cross-sectional area and color requirements, etc.;6. When connecting with the external circuit, the large cross section lead wire is suitable for the connector, and other connections are connected with the connecting terminals..