原帖由 NorthernWolfy 于 2009-1-11 20:57 发表 3 i! j% d' A) t- S+ |
问题:为什么MOTOR电路中STOP用常闭按钮?
; |. {8 E+ E4 j& f % K' _2 u0 a7 H- T2 ^Most time yes, but not all the time! % {( n' G F' b6 u' w# r8 _- ^* [3 I2 c
Not really, depand on which control sytem the motor is using and where the motor is using.... & Q$ i% Y \# H3 F. U* e0 l- h
$ O: c: a" C( H8 U+ w: W- q$ F4 }If the motor is controlled by the DCS starter or PLC's, sometimes it uses normal open contact....