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原帖由 NorthernWolfy 于 2009-1-11 20:57 发表 $ Z! w6 N, i, P$ L% Y
问题:为什么MOTOR电路中STOP用常闭按钮? 7 N# L7 z/ B) f( j! A6 ]0 D+ _7 l% N
* V8 O: [6 p$ O; |Most time yes, but not all the time! w, i) j9 }$ B( l2 Y# `& W
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Not really, depand on which control sytem the motor is using and where the motor is using....
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, r. z3 h2 Z; w9 Y6 u% KIf the motor is controlled by the DCS starter or PLC's, sometimes it uses normal open contact.... |
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