描述
继电器控制逻辑使用了大量的机械触点，连线也多，可靠性和可维护性差。而PLC采用微电子技术，大量的开关动作由无触点的半导体电路来完成，PLC还配有自检和监督功能，可靠性和可维护性好。
继电器控制逻辑依靠触点的机械动作实现控制，工作频率低，且机械触点还会出现抖动问题。而PLC是由程序指令控制半导体电路来实现控制，属于无触点控制，速度极快，且不会出现抖动。
Pro-face Graphic Panel GP370-SC31-24V, DC24V 20W
Servo Disk U9M4HA PMI Motion, Heavy Cast Base w/Sensors
Topsearch TS-M-8V01C. On Board Computer Automation 512K
Emerson / Motorola MVME 1600-001 Single Board Computer
Powerware Ferrups Best External Transfer Switch (NEW)
DAINIPPON SCREEN Power Supply/Controller CERD-8012-X2
BALDOR RIGHT ANGLE AC GEARMOTOR Torque: 90, Ratio: 40:1
OMRON Input Unit CJ1W-ID261. 24V DC, 4mA, Class 2 Only
National Instruments GRIB/TNT IEEE 488.2 Interface & SW
ULVAC SINKU KIKO Diaphragm Vacuum Dry Pump DAP-15
GALIL DMC-1414 Single Axis Motion Controler Plus Amp
AMPRO Baseboard, ETX without FX8C. 8554026B
Ergotron 200 Series Combo Mounting Kit Keyboard & Mouse
