描述
信号在长线中传输会遇到三个问题:一是高速变化的信号在长线中传输时出现的波反射现象,二是具有信号延时,三是长线传输会遇到外界干扰。
SIEMENS 6SC6140-0FE00, tested warranty
SIEMENS 6SC6140-0FE00, tested warranty
NEC ADU 25 F 1X Servo Drive , tested, warranty
NEC ADU 25 F 1X Servo Drive , tested, warranty
NEC ADU 25 F 1X Servo Drive , tested, warranty
ASEA Brown Boveri, ABB YYT 102C
ASEA Brown Boveri, ABB YYT 102C