福建中立恒自动化设备有限公司

一、摘要 PLC是一种专门在工业环境下应用而设计的数字运算操作的电子装置。

它采用可以编制程序的存储器，用来在其内部存储执行逻辑运算、顺序运算、计时、计数和算术运算等操作的指令，并能通过数字式或模拟式的输入和输出，控制各种类型的机械或生产过程。PLC及其有关的外围设备都应按照易于与工业控制系统形成一个整体，易于扩展其功能的原则而设计。在工业生产的各个领域，机械加工企业为了提高生产效率，采用机械化流水作业的方式，对不同类型的零件分别组成的自动生产线。随着产品机型的更新换代，生产线承担的加工对象也随之改变，这就需要改变控制程序，使生产线的机械设备按新的工艺过程运行，而继电接触器控制器系统是采用固定接线，很难适应这个要求。大型自动生产线的控制系统使用的继电器数量很多，随着PLC的应用日益普及,其使用方法简单,便于掌握,且可靠性,抗干扰性很强,自身具有完善的功能.模块化的结构,使其在工业生产线上的应用越来越广泛。

　　发展趋势：1.向高速度、大容量方向发展

　　为了提高PLC的处理能力，要求PLC具有的响应速度和更大的存储容量。目前，有的PLC的扫描速度可达0.1ms/k步左右。PLC的扫描速度已成为很重要的一个性能指标。

　　在存储容量方面，有的PLC可达几十兆字节。为了扩大存储容量，有的公司已使用了磁泡存储器或硬盘。

　　2.向超大型、超小型两个方向发展

　　当前中小型PLC比较多，为了适应市场的多种需要，今后PLC要向多品种方向发展，特别是向超大型和超小型两个方向发展。现已有I/O点数达14336点的超大型PLC，其使用32位微处理器，多CPU并行工作和大容量存储器，功能强。

WOODWARD 5464-536 REV A

DRS TECHNOLOGIES 8N76-1 POWER SUPPLY 10-130242-01

BRIDGE COLUMNS 186003930 30MM X 100MM COLUMN 129I113001LL XBRIDGE WATERS BEH sh

GE Mark VI IS200CPFPG1AAA Speedtronic Turbine Control PCB  BY GE sh

GE FT 60HZ K AC MOTOR 5K215BL305C 5HP 1160RPM 230/460 81 3P

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GORDON KAPES BP-4A POWER FAILURE BOARD AS IN PICTURE

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MARK VI CONTROL Is200bpihh1a .. module

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LOVEJOY 9541A-FD-4.9 MFPT CONTROLS 562670 IT

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APTECH AP1410TSHM 2PW FV4 MV4

GENUINE HID FARGO CARD PRINTERS DTC5500LMX

SIEMENS 6AG4011-1CG23-1JX0 SIMATIC RACK PC IL

ROCKWELL AUTOMATION 6181P15TS2KH/A SER.A ALLEN-BRADLEY 6181P-15TS2KHX REV.B

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BALLUFF BSW 113-493-X64-WA 06L3-9.9-1189 9802 250V 6A

IS200CVMBG1A voltage monitor GE Speedtronic MKVI gas turbine control

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SIEMENS SIMATIC HMI 6AV3688-3CD13-0AX0 E-STAND: A08

GENERAL ELECTRIC MARK CENTURY 1050 5908-60 REV.A

IS200PSCDG1ADB DS200PSCD l GE DRIVE CONTROL speedtronic

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nib Emerson OXT4A-3-4-0-0-12-1-1-00-00-00, Snubber Diffuser 6′ Probe, HART

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EATON CUTLER-HAMMER 6702ED591 74VDC RELIANCE ELECTRIC 417690-4R

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MITSUBISHI 80173-109-01 GU-D08

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MC145170DR2 SMD APPROX. LOT OF 846

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VES VACUUM ELECTRIC FURNACE SWITCH 34KV 600AMPS A0114 1000547G1

SA602AD SMD APPROX. LOT OF 1300

SIEMENS 14-193-701-562 94L03M68407-001 5000A TYPE 703A COIL 74VDC

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ROCKWELL AUTOMATION PF700L ADDRESSABLE POWER BOARD 181558-A01

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GE DS3800HSCF1A1A 6BA01

GE SCF 6DA02 DS3800HSCF1A1B 6BA02

HIMA F8621A COMMICATION MOUDULE

HIMA F8621A COMMICATION MODULE

EATON WL-35558 1101V98720 vacuum interrupter

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WESTINGHOUSE MME 20-100 CONTACTOR

WESTINGHOUSE MME 20-25 CONTACTOR

CISCO WS-X4724-SFP-E=

REFURB Emerson OXT4A-3-4-1-1-12-3-1-00-00-00, Diffuser 6′ Probe, HART

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NIB  SANYO DENKI 27BA050FXTH6 SERVO AMPLIFIER

RELIANCE ELECTRIC 0-60031-4A ' '

GENERAL ELECTRICS DS200SLCCG1AEG