原帖由 NorthernWolfy 于 2009-1-11 20:57 发表 8 z8 A6 o' T( Z" n/ w7 k
问题:为什么MOTOR电路中STOP用常闭按钮?
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Most time yes, but not all the time! . b: M5 p, G! Z' |8 W; f: @; {; f% w; Y: r. U( O/ v+ n
Not really, depand on which control sytem the motor is using and where the motor is using.... ; F1 C5 z; `5 \ \4 {0 A2 |# O, t$ _5 y( O3 S% y; V* K& w$ }/ y
If the motor is controlled by the DCS starter or PLC's, sometimes it uses normal open contact....