The signal line and the power line must be placed inside different metal pipes or metal hoses separately: if the signal line connecting the plc and the inverter is not placed in the metal pipe, it is highly susceptible to interference from the inverter and external equipment; There is no built-in reactor, so the input and output stage power lines of the inverter will have strong interference to the outside. Therefore, the metal tube or metal hose for placing the signal line should be extended to the control terminal of the inverter to ensure the signal line. Completely separated from the power line. (1)) The analog control signal line should use double stranded shielded wire with a wire size of 0.75mm2. When wiring, be sure to note that the cable stripping should be as short as possible (5-7mm), and the shield after stripping should be wrapped with insulating tape to prevent the shield from coming into contact with other equipment to introduce interference. (2) In order to improve the simplicity and reliability of the wiring, it is preferable to use a crimping bar terminal on the signal line.
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