PLC control cabinet cabinet put oneself in another's position structure and arrangement of control principle diagram

1, according to the figure, the highest standards too much. First, must read carefully the drawings before wiring, fully understand the designer's intentions, rather than according to personal experience so-called connection, if it is found that unknown place contact with designers or contradictions should be the first time confirmed that only when the correct, wiring construction. 2, connection order to clear, simple process has to check. This article can do little, but in actual basic thread ends up, who finished box. 3, learning skills, good at flexible use of professional tools. For example: Q: 【 When we do the PLC controller cabinet, wiring board, and a lot of terminals, deal with loosening, burr, etc, is directly to skin line into, or use the pin, or tin. 】 A: — — Single core directly into after peeling, multiconductor cold-press terminal, tin coating is not recommended; Q:【 Extension module of PLC is more long, the public to the client and the power supply connection is how to deal with, is through each PLC controller module on the terminal directly on to the next module in parallel, or connect to the terminal, the terminal on short answer? 】 A: — — Our maintenance equipment at the scene, in the hope that power supply on the terminal introduced respectively after allocation sub user point ( Thread tube or marking on the terminal number indicate the destination) Effect is small, so straightforward, between each other, don't want to and from one point to another point, do not want a meet than two lines under the terminal. For power terminal row, like using terminals or terminal with insurance can disconnect between up and down the sort of, look for short circuit fault is very convenient. 01 PLC controller internal and external circuit external circuit wiring diagram 1 is the motor starting full pressure control contactor electrical control circuit, control logic by ac contactor KM coil, indicator light HL1, HL2, thermal relay normally closed contacts FR, stop button to start button SB1 and SB2, contactor normally open auxiliary contactor KM by wire connection. Press the starting button SB1, after closed the QS is energized coil KM and self-locking, through to light HL1 branch's auxiliary contactor KM and the main contact of the main circuit, HL1 M bright, motor starting; Press the stop button SB2, coil KM blackouts, indicator light HL1, M a halt.
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