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根據(jù)PLC所具有的功能不同，可將PLC分為低檔、中檔、三類。
????（1）低檔PLC ?具有邏輯運(yùn)算、定時、計(jì)數(shù)、移位以及自診斷、監(jiān)控等基本功能，還可有少量模擬量輸入／輸出、算術(shù)運(yùn)算、數(shù)據(jù)傳送和比較、通信等功能。主要用于邏輯控制、順序控制或少量模擬量控制的單機(jī)控制系統(tǒng)。
????（2）中檔PLC???除具有低檔PLC的功能外，還具有較強(qiáng)的模擬量輸入／輸出、算術(shù)運(yùn)算、數(shù)據(jù)傳送和比較、數(shù)制轉(zhuǎn)換、遠(yuǎn)程I/O、子程序、通信聯(lián)網(wǎng)等功能。有些還可增設(shè)中斷控制、PID控制等功能，適用于復(fù)雜控制系統(tǒng)。
????（3）PLC???除具有中檔機(jī)的功能外，還增加了帶符號算術(shù)運(yùn)算、矩陣運(yùn)算、位邏輯運(yùn)算、平方根運(yùn)算及其它特殊功能函數(shù)的運(yùn)算、制表及表格傳送功能等。PLC機(jī)具有更強(qiáng)的通信聯(lián)網(wǎng)功能，可用于大規(guī)模過程控制或構(gòu)成分布式網(wǎng)絡(luò)控制系統(tǒng)，實(shí)現(xiàn)工廠自動化。
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?Flowline LU72-5805 Ultrasonic Level Switch, Supply Voltage: 12-28VDC
?Symbol LS4006I-I100 Barcode Scanner, Power: 4.8-14VDC 180-200mA
?Weidmuller CSA 950 (234) /UL 1950 Power Supply, In: 115-230VAC, Out: 24VDC 5A
?Parker 02F20C3503ABFGC0543 Liquid CO2 Valve, 110/120VAC 50/60Hz 10.2/12.3W Coil
?Tomar 490S-120 Microstrobe Light, Voltage: 120VAC 50/60Hz, Color: Blue
?National Instruments 183712B-01 DAQPad Cable Adapter 50-Pin to 68-Pin
?National Instruments SH68-68-EP 184749-05 Cable for Multifunction DAQ 5m Length
Keithley 7036-MTC-2 Mass Terminated Cable Assembly for 7036 Relay Cards 96-Pin
?Va-Tran Systems SNO-GUN Power Supply & Timer 120VAC Analog Control
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?Lot of 2 New Sloan F5A CP Royal Spud Coupling Assembly 1 1/4" x 3" Chrome Finish
?Cutler Hammer C 400LG1 Start/Stop Push Button Switch 1N.C. & 1N.O.
?Lot of 3 New Sloan F5AW Flushometer Spud Coupling & Flange Kit for 3/4" Urinal
?New Telemecanique LT2-SA 00B Thermal Trip Protection Relay 24VAC
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?Idec AVLW49902D-R-24V E-Stop Pushbutton 110-600VAC 120-600VDC 10A 1NO 2NC
?Hoffman CSD12126 Electrical Enclosure, Dimensions: 12" x 12" x 6", *Holes*
?THK HRW21CA Carriage on 780mm Long Rail, Dimensions: 21mm x 68mm x 58.8mm
?Lot of 2 IDEC RH2B-U DC24V Relays 24VDC Coil 120/240VAC 10A Contacts DPDT
?THK HRW21CA Carriage on 380mm Long Rail, Dimensions: 21mm x 68mm x 58.8mm
?Telemecanique LC1 D2510 Contactor 3-Pole + N.O Aux Rated @ 40A 1000V, 120V Coil
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?New ACE MC75-3 Miniature Shock Absorber 75in-lbs/cycle 0.4" Stroke 1/2-20 Thread
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?Allen Bradley 100-C16*10 Contactor 3-Pole + N.O. Rated 32A 690V, 110/120V Coil
?Allen Bradley 100-C09*10 Contactor 3-Pole + N.O. Rated 32A 690V, 110/120V Coil
?Parker RS33C-DNNPS Stepper Motor, Shaft: 0.375" Diameter, 340VDC Winding
?Allen Bradley 100-C23*10 Contactor 3-Pole + N.O. Rated 32A 690V, 110/120V Coil
?Manifold of 4 SMC SY3140-5LOZ Solenoid Valves With Interface Regulators & Gauges
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?New SMC RSDQB20-10DR-F79SAPC Stopper Cylinder w/ Roller Rod End 10mm Stroke 1MPa
?Parker Compumotor Zeta4-240 Indexer / Stepper Motor w/ Power Cable
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?GE IC300ADC110B Analog Input Smart Stack Module 4 Channel 12-Bit Resolution
?GE Fanuc IC3000CS200H Operator Interface Panel 24VDC 180mA
?SMC CXSM10-60 Dual Rod Cylinder, 0.7MPa Max (101psi), 10mm Bore, 60mm Stroke
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?Hose Master Stainless Corrugated Hose With Stainless Steel Braid, 36" Long
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?Flex Cable FC-CFBM6DF-CBAF-M003 Feedback Cable, 28-Pin to Flying Leads, 3m Long
?Flex-Cable FC-FPBM6DF-16AF-M003 Motor Power Cable w/ Brake Flying Lead
?New In Box Pentair SF0524414 Filter Fan, Power: 24VDC 0.17A, Speed: 3050RPM
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