描述
工业现场的环境比较恶劣，存在着许多高低频干扰。这些干扰一般是通过与现场设备相连的电缆引入PLC的。除了接地措施外，在电缆的设计选择和敷设施工中，应注意采取一些抗干扰措施：模拟量信号属于小信号，极易受到外界干扰的影响，应选用双层屏蔽电缆；高速脉冲信号（如脉冲传感器、计数码盘等）应选用屏蔽电缆，既防止外来的干扰，也防止高速脉冲信号对低电平信号的干扰；
RELIANCE ELECTRIC 3FR2042 USPP 3FR2042
RELIANCE ELECTRIC 45C-200A NSPP 45C200A
RELIANCE ELECTRIC 45C-314 USPP 45C314
RELIANCE ELECTRIC 0-49011-6A NSFP 0490116A
**NIB** Reliance Electric Rectifier Stack 86466-88R
**NIB** Reliance Electric PC Board 0-55325-37
Expedited shipping available
Reliance Electric A40 Control Processor 45C410A 45C410
Expedited shipping available
RELIANCE ELECTRIC 45C-364 NSPP 45C364
RELIANCE ELECTRIC 0-52808-3 NSFP 0528083
RELIANCE ELECTRIC 86466-84V USPP 8646684V
RELIANCE ELECTRIC 91202-23SC USPP 9120223SC
RELIANCE ELECTRIC 0-51381-16 NSFP 05138116
