描述
从控制速度上看，继电器控制系统依靠机械触点的动作以实现控制，工作频率低，机械触点还会出现抖动问题。而PLC通过程序指令控制半导体电路来实现控制的，速度快，程序指令执行时间在微秒级，且不会出现触点抖动问题。
RELIANCE 9VT401-011HTANN HVAC DRIVE VTAC9 ***NNB***
1.5HP Reliance Motor with Reducer FREE SHIPPING
RELIANCE ELECTRIC 846723T USPP 846723T
RELIANCE ELECTRIC 607980-70B USPP 60798070B
Reliance 0-49005-4
RELIANCE ELECTRIC 45C-17A USPP 45C17A
1HP Reliance Electric Motor with Reducer FREE SHIPPING
1 HP Reliance Motor with Reducer FREE SHIPPING
RELIANCE ELECTRIC 0-56303 USPP 056303
RELIANCE ELECTRIC P25G6903 NSPP P25G6903
RELIANCE ELECTRIC 86466-60R USPP 8646660R
RELIANCE ELECTRIC 5V4151 USPP 5V4151
RELIANCE ELECTRIC 0-48680-111 NSPP 048680111
RELIANCE ELECTRIC 0-49001-5 NSFP 0490015
RELIANCE 6SP401-022CTAN A-C DRIVE SP600 ***NNB***
