福建中立恒自动化设备有限公司

目前，世界上有200多个厂家生产可编程序控制器产品，厂家有德国的西门子，美国的Rockwell(AB)、通用(GE),日本的三菱、欧姆龙，法国的施耐德等。

可编程序控制器总的发展趋势是向高集成度、小体积、大容量、高速度、易使用、高性能方向发展。具体表现在以下几个方面：

(1)向小型化、专用化、低成本方向发展

20世纪80年代初，小型PLC在价格上还高于小系统用的继电器控制装置。随着微电子技术的发展，新型器件大幅度的提高功能和降低价格，使PLC结构更为紧凑，功能不断增加，将原来大、中型PLC才有的功能移植到小型PLC上，如模拟量处理、数据通讯和复杂的功能指令等，但价格不断下降，真正成为继电器控制系统的替代产品。

(2)向大容量，高速度方向发展

大型PLC采用多微处理器系统，有的采用32位微处理器，可同时进行多任务操作，处理速度提高，特别是增强了过程控制和数据处理的功能。另外，存储容量大大增加。

(3)与计算机联系密切

从功能上看，PLC不仅能完成逻辑运算，且计算机的复杂运算功能在PLC中也进一步得到利用，从结构上看，计算机的硬件和技术越来越多地应用到PLC；从语言上看，PLC己不再是单纯用梯形图语言，而且可用多种语言编程，如类似计算机汇编语言的语句表，甚至可直接由计算机语言编程；在通讯方面，PLC与计算机可直接相连并进行信息传递。

(4)发展多样化

可编程序控制器发展的多样化体现在3个方面：产品类型、编程语言和应用领域。

(5)模块化

PLC的扩展模块发展迅速。功能明确化、专用化的复杂功能由专门模块来完成。主机仅仅通过通讯设备向模块发布命令和测试状态，这使得PLC的系统功能进一步增强，控制系统设计进一步简化。

(6)网络与通讯能力增强

计算机与PLC之间以及各个PLC之间的联网和通讯的能力不断增强，使用工业网络可以有效地节省资源、降低成本、提高系统可靠性和灵活性，致使网络的应用有普遍化的趋势。

(7)多样化与标准化

生产PLC产品的各厂家都在大力度地开发自己的新产品，以求占据市场的更大份额。因此产品向多样化方向发展，出现了欧、美、日多种流派。与此同时，为了推动技术标准化的进程。一些国际性组织，如国际电工委员会(IEC)不断为PLC的发展制定一些新的标准，如对各种类型的产品作一定的归纳或定义，或对PLC未来的发展制定一种方向或框架。

(8)工业软件发展迅速

与可编程序控制器硬件技术的发展相适应，工业软件的发展非常迅速，它使系统应用更加简单易行，大大方便了PLC系统的开发人员和操作使用人员。

可编程序控制器的输出信号类型可以是开关量、模拟量和数字量。输出单元从广义上分包含两部分：一是与被控设备相连接的接口电路，另一部分是输出的映像寄存器。

PLC运行时CPU从输入映像寄存器读取输入信息并进行处理，将处理结果放到输出映像寄存器。输出映像寄存器由输出点相对应的触发器组成，输出接口电路将其由弱电控制信号转换成现场需要的强电信号输出，以驱动电磁阀、接触器、指示灯等被控设备的执行元件。

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1MBI1200UE-330- Semiconductor - Electronic Component

PM100CSD120 - IGBT - Semiconductor - Electronic Component

MIG100Q6CMB1X- Semiconductor - Electronic Component

TD330N12KOF - Semiconductor - Electronic Component

Maniforld Assy. SYJ5243 SLOZ  EX510-S001 cleanroom/semiconductor store spare

100x KM62256DLG-7L SEC Low Power Semiconductor CMOS Static Memory

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Shawmut A50P60 Fuse Semiconductor 60 A Lot Of 12

Micro Probe J937 Parm Theta Board PCMT87MF Semiconductor Inspection

Galco Westcode Semiconductors SCR SW250X0110

Siemens Semiconductor Motor Starter 3RW3018-1BB14  DHL or

LINEAR SEMICONDUCTORS DC1843A / DC1843A

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Micropump GA-T23.JDS.A Magnetic Drive Gear Pump L21335 0713 Semiconductor Spare

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 ! COOPER BUSSMANN 1250A 690V SEMICONDUCTOR FUSE 170M6266

IC Intercable Danmark semiconductor contactor SC3DD2310 semiconductor contactor 230V10A

Shipping not specified

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22  LITTELFUSE L60S 50 SEMICONDUCTOR BLADE FUSES L60S50

Applied Materials 0200-10676 SEMICONDUCTOR PART

Healthcare Physiotherapy Laser thearpy Computerised Semiconductor LCD Laser dJD

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Semiconductor Circuits EA23-100 Power Supply Module EA23100

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279821 / QUARTZ TUBE ASSY / FUSION SEMICONDUCTOR SYSTEMS

ON SEMICONDUCTOR NCP12700LOWVINGEVB / NCP12700LOWVINGEVB

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50PCS/  IR IRF450 N-Channel Power Mosfets Semiconductor /PL3

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  3RM1002-2AA04 AC Semiconductor Motor Starter 2 #D3

3RF2440-1AB45 3 phase 3RF2 semiconductor contactors  Genuine Product

MBN500H65E2- Semiconductor - Electronic Component

RABBIT SEMICONDUCTOR CONTROL BOARD 20-175-0264B

(Set of 1500) OSRAM Opto Semiconductors LS 5436 Bin1:V-1-0-20, 5mm LED. 411863

24585 SCREEN SEMICONDUCTOR SOLUTIONS BATH BLOCK, 5-F3-99352 5F399352

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6SY7010-0AA41- Semiconductor - Electronic Component

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6MBP75RS-120 FUJI Module - Semiconductor - Electronic Component

Healthcare Physiotherapy COMPUTERISED LASER THERAPY Semiconductor it TK9

6MBP100RSM120 - Electronic Component - Semiconductor Module

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Philips Semiconductors BZD23-C47 Diode, Type: BZD23-C47. 5000 Pcs

Philips Semiconductors BYD13K 933737760133 Diode, Type: BYD13K

Philips Semiconductors BZD23-C16 933753440133 Diode, Type:

Philips Semiconductors PLVA450A 934017270143 Diode, Type: PLVA450A

Philips Semiconductors BZD23-C20 933753460133 Diode, Type: BZD23-C20

Philips Semiconductors BZD23-C430 933962880133 Diode, Type: BZD23-C430

Philips Semiconductors BZD23-C75 933753600133 Diode, Type: BZD23-C75

Applied Materials 0020-10141 PUMPING PLATE, SEMICONDUCTOR PART

Philips Semiconductors 1N5244B 933379200133 Diode, Type: 1N5244B

Philips Semiconductors 1N5245B 933379210133 Diode, Type: 1N5245B

Philips Semiconductors BZD23-C56 933753570133 Diode, Type: BZD23-C56 3700Pcs

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Bussmann Buss 170M6059 Semiconductor Fuse /PL3

PM300CLA060 - Module / Electronic Component / Semiconductor

PM100RLA120 - Module / Electronic Component / Semiconductor

Siemens 3RW4037-1BB04 AC Semiconductor Motor Starter

SIEMENS 3NC3 341-1 SEMICONDUCTOR FUSE -

Siemens 3NC3 341-1 Semiconductor Fusible - Lote De

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Applied Materials 0140-38145 HARNESS,ASSY, SEMICONDUCTOR PART

SEMIX453GD12E4C- Semiconductor - Electronic Component

TT430N24KOF- IGBT - Semiconductor - Electronic Component

  A50QS600-4 Semiconductor Fuse 500V 600A #D3

 PM30CMA060 POWER TRANSISTOR MODULE INSULATED SEMICONDUCTOR #W8

 PM30CMA060 POWER TRANSISTOR MODULE INSULATED SEMICONDUCTOR #D4

LINEAR SEMICONDUCTORS DC782A-P / DC782AP

LINEAR SEMICONDUCTORS DC782A-D / DC782AD

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LINEAR SEMICONDUCTORS DC782A-N / DC782AN

HG(HuaGao) 16 PCS 2SC2879(M16,Match HFE) build by China HG Semiconductor

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Bussmann Buss 170M6258 Semiconductor Fuse /PL3

 6RW73TMY93 POWER DIODE SEMICONDUCTOR * *

1X TEC1-13930 semiconductor cooling chip 80 * 120mm

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 ! COOPER BUSSMANN 1250A 690V SEMICONDUCTOR FUSE 170M6166

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QM600HA-2H POWER TRANSISTOR MODULE INSULATED SEMICONDUCTOR  #D3

QM600HA-2H POWER TRANSISTOR MODULE INSULATED SEMICONDUCTOR  #A6-39

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BUSSMANN 1100A 690V SEMICONDUCTOR FUSE 170M6265 /PL3

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