描述
(1).随机存取存储器(RAM)
用户可以用编程装置读出RAM中的内容,也可以将用户程序写入RAM,因此RAM又叫读/写存储器。RAM的工作速度高、价格便宜、改写方便。
(2).只读存储器(ROM)
ROM的内容只能读出,不能写入。
(3).可以电檫出可编程的只读存储器(EEPROM)
S7-200用EEPROM来存储用户程序和长期保存的重要数据。
4.I/O模块
各I/O点的通/断状态用发光二极管(LED)显示,PLC与外部接线的连接一般用接线端子,某些模块使用可以拆卸的插座型端子板,不需断开端子板上的连接线,就可以迅速的更换模块。
输入模块:PLC通过输入模块来接收和采集输入信号,通过输出模块控制接触器、电磁阀、电磁铁、调速装置等执行器,PLC控制的另一类外部负载是指示灯、数字显示装置和报警装置等。输入电路中设有RC滤波电路,以防止由于输入触点抖动或外部干扰脉冲引起的错误输入信号。
输出模块:输出模块的率放大元件有大功率晶体管和场效应管(驱动直流负载)、双向可控硅(驱动交流负载)和小型继电器,继电器可以驱动交流负载或直流负载。输出电流的典型值为0.5—2A,负载电源由外部现场提供。
欧美品牌停产的,常用的“PLC”备品备件
我司产品应用于以下领域:
1,《发电厂DCS监控系统》
2,《智能平钢化炉系统制造》
3,《PLC可编程输送控制系统》
4,《DCS集散控制系统》
5,《智能型消防供水控制系统》
6,《化工厂药液恒流量计算机控制系统》
7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列
本特利,英维思,伍德沃德,福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐,ACSO,力士乐等各大品牌的DCS系统配件,机器人系统配件,大型伺服系统备件。
C60415 Unitek Micropull IV Wire Bond Pull Tester 1000g
C61654 Unitek Micropull IV Wire Bond Pull Tester RS232
N72714 Perkin Elmer Aanalyst 100 Atomic Spectrometer
N72711 Seiko D-Tran XM3106B Robotic Arm
C51193 Agilent E4406A Transmitter Tester w/ 202 300 BAF
N72004 Eppendorf 5804 Multipurpose Centrifuge w/Rotor
C52517 Agilent E4406A Transmitter Tester w/ 202 300 BAH
N59001 Unitek Micropull IV Wire Bond Pull Tester
N70041 Rainin Varian Dynamax SD-200 UV-1 FC-1 HPLC Sys.
AE43755 RECIF SA Wafer Scribe Reader IDLW8 System
C69112 Spectra Multi-Quad LMI Gas Analyzer w/ Turbo Vac
L65211 DEK 248ce Semi-Automatic Screen Printer
A41046 ADE Technologies DiskMapper Model M2 System
N63492 Fluke Networks Optiview Workgroup Analyzer
N67906 Tektronix RTPA2A TekConnect Probe Adapter NIB
A66346 Piller Apostar AS50 UPS System 50 kVA, 480V 85A
N53546 Perkin Elmer 300 Micralign Projec. Mask Aligner
C69602 Logitech 2125 Polishing / Bonding Jig
A58951 K&S 6491 Semi-Automatic Die Bonder
A71987 Varian Prostar Autosampler 420, 210, 325, 701
C54973 Agilent 16950A 600MHz State/4GHz Timing/4Meg Mem
C54587 Agilent 16950A 600MHz State/4GHz Timing 4Meg Mem
G53498 Two Alcatel IPUP A100L Dry Vacuum Pumps
N71355 Isel Robotik Wafer Handling Robot 10-21-0015
C72658 FST Fine Semitech Dual Recirculating Chiller
N71514 Leitz Wetzlar Trinocular Microscope w/Stage
N72005 Eurotherm TU1451 SCR Power Controller
C51174 HP E4406A Transmitter Tester 7MHz-4GHz w/Opt BAH
N59032 Signatone S-1007S Manual Probe Station S1007S
N63395 K&S 1470-4 Automatic Wedge Bonder
C51195 HP E4406A VSA Transmitter Tester w/BAH, 204, UK6
C51194 Agilent E4406A Transmitter Tester w/ Opt 202 BAH
G72332 Agilent G1314B VWD Variable Wavelength Detector
G72403 Heidolph Laborota 4001 & Heizbad HB Digital
G71854 NSK XY-HRS120-RH2SN?F Linear Stage w/Ballscrew
G72622 Brinkman Metrohm 784 KFP Titrino & 703 Ti Stand
K72692 Quester Tech. UFT10-02 Liquid Source Cabinet LSC
K72693 Cleansorb CS096DCD Dry Bed Absorber Cabinet
C55171 Agilent 16950A 600MHz State/4GHz Timing/1Meg Mem
A69921 (2) Balanced Power II BPII25 UPS System 25 kVa
N72803 (2) Christie Electrohome Roadie S12 Projectors
N57984 ABI Prism 6700 Auto Nucleic Acid Workstation
C70346 Veeco Dektek SXM Atomic Force Microscope Control
L67921 Hughes Wire Bonder System WD-8700D1
A69920 Leybold Coolpak 6200 Compressor w/ Cold Head
A63423 Bemco Inc. FC-77 Cart Environmental Pump System
A62562 Varian VE10 Vacuum Evaporator, Edwards E2M5
N58955 Signatone S-250-5 Wafer Prober w/ B&L Microzoom
N58956 3S 8013 Pick & Place Inspection Wafer Station
N69000 Instrumentation IL ACL 8000 Coagulation Analyzer
A50159 Tenney Six Engineering T6S Chamber 21*22*23H
N56306 Edwards EH500A Mechanical Booster Pump D90SD
Y70234 Crest Ultrasonic Cleaner & Ultrasonic Generator
C66608 Dage TP1KG Tweezer Load Cell 1kg for 2400PC
A72127 Waters 600 Multisolvent Delivery System HPLC
A72125 Waters 4000 Pump System Controller HPLC
A72126 Coherent Innova 90 Argon Ion Laser System
N65584 Perkin Elmer 1002700 Vacuum Ion Pump System
C51594 Agilent 16950A 600MHz State/4GHz Timing/1Meg Mem