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原帖由 NorthernWolfy 于 2009-1-11 20:57 发表 : J2 ^, k! L" B7 L) f8 S/ [8 I- s
问题:为什么MOTOR电路中STOP用常闭按钮? 4 A% Z9 u& o7 w; A
. C9 K |- J, tMost time yes, but not all the time!
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$ j; t3 K$ u! Q/ [8 [Not really, depand on which control sytem the motor is using and where the motor is using.... ( y2 Y: ?5 H4 K3 y+ s4 m8 |
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If the motor is controlled by the DCS starter or PLC's, sometimes it uses normal open contact.... |
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