 鲜花( 0)  鸡蛋( 0)
|
原帖由 NorthernWolfy 于 2009-1-11 20:57 发表 
" i4 B. v% x; o7 q问题:为什么MOTOR电路中STOP用常闭按钮?
7 {8 C8 g% Y5 g2 S6 `* b5 k$ J7 A$ ~$ r# ?
Most time yes, but not all the time!. ^7 y, H* R0 E1 j& I
: A5 [/ Y. v, d/ `* D
Not really, depand on which control sytem the motor is using and where the motor is using.... , A+ S: F' b' w% m' g! x! d5 i$ m
# e/ F" L! J0 Y. [5 gIf the motor is controlled by the DCS starter or PLC's, sometimes it uses normal open contact.... |
|