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 Electric 1SU41002 2HP SP500 AC Drive 2 HP
Reliance Electric 0-51845 PRSA Power Supply 051845 Used
Leedy Reliance Brass Snare Drum – 1930’s;ORIGINAL STAND
RELIANCE Y-2012-2-H04AA PRECISION GEARHEAD NR23S-005
One-day shipping available
RELIANCE ELECTRIC 1AC2075 USPP 1AC2075
Baldor Reliance Electric Motor P14G7510 N 2 HP tested
Baldor Reliance Electric Motor P14G7510 NJP 2HP tested
Baldor Reliance Electric Motor P14G7510 RAG 2HP tested
RELIANCE ELECTRIC B14J1060N-VX USPP B14J1060NVX
RELIANCE ELECTRIC 608870-31R NSFP 60887031R
