描述
PLC(MR型或MT型)的输出点、COM点直接与变频器的STF(正转启动)、RH(高速)、RM(中速)、RL(低速)、输入端SG等端口分别相连。PLC可以通过程序控制变频器的启动、停止、复位；也可以控制变频器高速、中速、低速端子的不同组合实现多段速度运行。但是，因为它是采用开关量来实施控制的，其调速曲线不是一条连续平滑的曲线，也无法实现精细的速度调节。这种开关量控制方法，其调速精度无法与采用扩展存储器通讯控制的相比。
New RELIANCE ELECTRIC 607980-71F Encoder 3/4hp Motor
Encoder Inverter Motor 1329RS-ZAF7518MVC-HB 3/4 Motor
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RELIANCE 0-51381-11 Controller PCB (New)
Reliance Electric RE 57C330 Remote I/O Head DCS 5000
**NIB** Reliance Electric PSD AC Flexpak 0-48680-525
Expedited shipping available
Reliance IMAF57725 125 HP Duty Master Electric Motor
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Expedited shipping available
RELIANCE ELECTRIC 16 BIT REGISTER OUTPUT MOD 45C-381B
Dodge/Reliance Gear Reducer with Motor 1808M3A
Dodge APG Gear Reducer Size 1808M3A
Reliance VC-90 Regulator board B/MO 55326, CL 55342
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APV Industrial Pump w/ Reliance 1HP motor
Reliance/Netco 5 HP Mixer (MX1048)
