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。

以下链接皆有货

AFT AXIGUARD

AFTER MARKET AHS-7004-4-B-BZ LAND SCAPE LIGHT, BRASS WITH BRONZE FINISH 4" LEAD

AFTERMARKET #DPFC22778066 DPF BOND & V-BAND CLAMPS FOR VOLVO MACK TRUCKS

AFX Ozone Analyzer MINI HICON

Afx Ozone Catalyst Unheated Alum

AGA 1400W 240V HEATING ELEMENT 154277/1 BOF23143 NATO PART fd6f7

AGASTAT VTM SOLID STATE TIMING MODULE 1 - 1000 SECONDS ad2G8

AGC JLTJOS-E15J-P 1-1/2"

AGCO M25BVIS-2 BLOCK & BLEED GUAGE VALVE 1/4"NP

AGFA-GEVAERT 7 5146 1461 1,8.5146.8990.1 BOARD

Agilent - Keysight 4294A Precision Impedance Analyzer, 40 Hz to 110 MHz

Agilent - Keysight 70952B Optical Spectrum Analyzer Module 600 to 1700nm

Agilent - Keysight 81110A-81111A DE41B05926 Pulse Pattern Generator, 165-330 MHz

Agilent - Keysight 8114A -001 High Power Pulse Generator

Agilent - Keysight 83050A Microwave System Amplifier, GHz

Agilent - Keysight 8341A Synthesized Sweeper, 10MHz to 20GHz (0774)

Agilent - Keysight 83620A -001 10MHz to 20GHz Synthesized Signal Generator (0302

Agilent - Keysight 83620A -006 10MHz to 20GHz Synthesized Signal Generator (1425

Agilent - Keysight 83620B -004 -006, 10MHz to 20GHz Synthesized Signal Generator

Agilent - Keysight 83650A Synthesized Signal Generator, 50GHz OPTIONS 3420A00654

Agilent - Keysight 83650B -001-002-008 Synthesized Signal Generator (0247)

Agilent - Keysight 83650L 10MHz-50GHz Swept CW Generator

Agilent - Keysight 8504B Precision Reflectometer

Agilent - Keysight 85110A-K30 Pulsed-RF S-Parameter Test Set

Agilent - Keysight 8564E -006 Spectrum Analyzer, 30 Hz to 40 GHz

Agilent - Keysight 8565EC 007-001-005-006-008 Spectrum Analyzer, 9 kHz to GHz

Agilent - Keysight 86100B Infiniium DCA Wide-Bandwidth Oscilloscope

Agilent - Keysight 86107A -040 Precision Timebase Reference Module (0414)

Agilent - Keysight 86116A/H02 - (86117B, 86117A) 2-Channel 65 GHz Elect

Agilent - Keysight 86118A 70 GHz dual remote sampling head / module

Agilent - Keysight 86122B -021 Multi-Wavelength Meter, 1270 - 16nm CALIBRATED

Agilent - Keysight 86142A -004-006 Optical Spectrum Analyzer 600 to 1700nm (0122

Agilent - Keysight 86142A Optical Spectrum Analyzer, 600 to 1700nm

Agilent - Keysight 8703B -155 Lightwave Componenet Analyer

Agilent - Keysight 87075C -006 Multiport Test Set, 3-1300MHz, 75 Ohm, 6 Ports

Agilent - Keysight 8722ES 10 US39175790 Vector Network Analyzer, 50MHz to 40GHz

Agilent - Keysight 8753E -006-011 US38431797 RF Vector Network Analyzer to 6 GHz

Agilent - Keysight 8757D -001 Network Analyzer, 10MHz to 110GHz (1373)

Agilent - Keysight E4407B -H57 ESA-E26.5, Portable Spectrum Analyzer (0255

Agilent - Keysight E4438C ESG Vector Signal Generator US41460767 OPTIONS

Agilent - Keysight E4448A PSA Spectrum Analyzer, 50GHz

Agilent - Keysight E5052B Signal Source Analyzer, Calibrated

Agilent - Keysight E8356A PNA Network Analyzer, 300 kHz toGHz US41060150

Agilent - Keysight M9703A AXIe 12-bit High-Speed Digitizer/Wideband (4967) Opts

Agilent - Keysight N4874A Pattern Generator Module

Agilent - Keysight N4903A DE45A00226 Serial J-BERT, 12.5 Gb/s OPTIONS

Agilent - Keysight N4906A Bit Error Ratio Tester

Agilent - Keysight N4906B Serial Bert

Agilent - Keysight N5106AA -611-632-8FP-JFP-QFP Baseband Generator

Agilent - Keysight N5106AA-611-632-8FP-JFP-QFP Baseband Generator

Agilent - Keysight N5106AA-616-634-8FP-JFP-QFP-RFP-TFP Baseband Generator

Agilent - Keysight N5242A PNA-X Microwave Network Analyzer

Agilent - Keysight N5260A-110 0136 Millimeter-Wave Controller

Agilent - Keysight N5507A 1.5 GHz to 26.5 GHz Low Noise Downconverter

Agilent - Keysight N8945A Autoranging System DC Power Supply, 80 V, 340 A

Agilent - Keysight N8975A Noise Figure Analyzer to 26.5GHz

Agilent - Keysight N9020A-503 MY49100759 MXA Signal Analyzer OPTIONS

Agilent - Keysight N9030A MY49430138 PXA Signal Analyzer *Options*

Agilent - Keysight N9030A PXA 3.6 GHz Signal Analyzer, 0125 OPTIONS!

Agilent - Keysight N9343C Handheld Spectrum Analyzer 1MHz- 13.6GHz

Agilent - Keysight U8101A-801 Display Tester - test configuration

Agilent , Keysight 8722ES /010,085,1D5 Vector Network Analyzer

AGILENT / HP 16532-61601 INTERFACE RF TRIGGER fba10a13

Agilent / HP 8340A 005 2410A00523 Synthesized Sweep Signal Generator 26.5GHz

Agilent / HP 83650L-008 Synthesized CW Generator, 10 MHz to GHz 00134

Agilent / Keysight - E4448A - PSA Series Spectrum Analyzer, 3Hz-50GHz

Agilent / Keysight 35670A 3940A04272channel FFT Dynamic Signal Analyzer

Agilent / Keysight 4279A-800 SG43100101 1MHz C-V Meter

Agilent / Keysight 81110A 81111A DE41B07363 Pulse Pattern Generator, 330 MHz,

Agilent / Keysight 83558A 83558-60003 3942A00693 Wave Source Module 75 – 110GHz

Agilent / Keysight 8564E 007 008 3846A01480 Spectrum Analyzer, 30 Hz to 40 GHz

Agilent / Keysight 8593E 3710A02988 Portable Spectrum Analyzer, 9 kHz to 22 GHz

Agilent / Keysight 86142B 006 US40151517 Optical Spectrum Analyzer, 600-1700nm

Agilent / Keysight 86143B 006 US40150315 Optical Spectrum Analyzer

Agilent / Keysight 89410A 3416A01003 Vector Signal Analyzer DC - 1.8GHz OPTIONS

Agilent / Keysight E4440A (Opt. 111, 115) PSA series Spectrum Analyzer

Agilent / Keysight E5071B ENA Network Analyzer 300kHz - 8.5GHz SG42400162 OPTION

Agilent / Keysight E8251A US41140228 Analog Signal Generator, 250kHz to 20GHz

Agilent / Keysight E8257D 520 SG46410015 PSG Analog Signal Generator, OPTIONS

Agilent / Keysight E8257D 520, 1ED, 007 MY492812PSG Analog Signal Generator

Agilent / Keysight E8257D-520 SG46130067 PSG Analog Signal Generator

Agilent / Keysight N4903B MY49100344 Serial J-BERT, 1Mb/s to 12.5 Gb/s OPTION

Agilent / Keysight N4903B MY49101043 Serial J-BERT, 1Mb/s to 12.5 Gb/s Option

Agilent / Keysight N4974A 001-101 MY53235524 PRBS Generator 44 Gb/s

Agilent / Keysight N5182A MY50141836 MXG RF Vector Signal Generator, 6 GHz

Agilent / Keysight N5242A MY48420820 PNA-X Microwave Network Analyzer OPTIONS

Agilent / Keysight N9030A MY49430320 PXA Signal AnalyzerHz to 26.5 GHz OPTION

AGILENT 10719A ONE-AXIS DIFFERENTIAL INTERFEROMETER

AGILENT 10721A TWO-AXIS DIFFERENTIAL INTERFEROMETER

AGILENT 10897B ,4039 LASER AXIS VME BUS BOARD

AGILENT 11713B C OPTION 501 11713-60043 VIKING TOx 9 WAY D TYPE CABLE ae1w3

AGILENT 16702B LOGIC ANALYSIS SYSTEM 16500-40502 [3EA],16753A,16720A & CABLES

Agilent 4156C Semiconductor Parameter Analyzer

AGILENT 4286A RF LCR METER

Agilent 5DX X-RAY Control Panel Assy : Digital I/O N7200-60079

Agilent 5DX X-RAY Control Panel Assy : Motion Control N7200-60072 TDP Servo

Agilent 5DX X-RAY Control Panel Assy : Scan Controller N7200-80026

Agilent 5DX X-RAY Control Panel Assy:PCI Expansion Chassis N7200-60050

Agilent 5DX X-RAY Control Panel Assy:System PC Controller N7210-68203

Agilent 81110A DE38702019 Pulse Pattern Generator, 330 MHz, 3.8 V, Ω

Agilent 81600B Tunable Laser transmission bands: 1260 nm – 1640 nm OPT, CAL

Agilent 81949A Compact Tunable Laser Source, 1520nm to 1630nm

Agilent 8341A Synthesized Sweeper, 10MHz to 20GHz,

Agilent 83732B 1E2,800 US37100865 Synthesized Signal Generator, 10MHz to 20GHz

Agilent 83752A 20 GHz Signal Generator

AGILENT 85133-60016 2.4mm TO 2.4mm 50GHz TEST PORT CABLE 63CM ad2~3

Agilent 8561EC /007 Spectrum Analyzer

Agilent 8562EC Spectrum Analyzer, 30 Hz to 13.2 GHz

Agilent 8565E Spectrum Analyzer, 9 kHz to GHz

Agilent 86120C Multi-Wavelength Meter

Agilent 86142B DE44103259 Optical Spectrum Analyzer, 600-1700nm CALIBRATED

Agilent 86145B US40150336 High Performance Optical Spectrum Analyzer

Agilent 8703A /100-210 Lightwave Analyzer

Agilent 8703B Lightwave Componenet Analyer

Agilent 8720D Opt. 012 Vector Network Analyzer, 50MHz to 20GHz, SN US36140219

Agilent 8722D Microwave Network Analyzer 40GHz Options US38110519

Agilent 8722D Microwave Network Analyzer to 40GHz

Agilent 8722ES /010-400-1D5 Vector Network Analyzer to 40GHz

Agilent 8722ES Vector Network Analyzer, 40GHz Calibration Included!

Agilent 8753ES /006 6 GHz RF Network Analyzer

Agilent 8753ES -006 US39173236 RF Network Analyzer 30 kHz to 6 GHz OPTIONS

AGILENT 909F OPT 013 PRECISION N TYPE FEMALE TERMINATION 00909-60010 fbb15a51

Agilent Coaxial Switches N1810/1/2, N1810UL,

Agilent E4404B MY50141756 Portable Spectrum Analyzer, 9kHz to 6.7GHz Options

Agilent E4438C ESG Vector Signal Generator US41460785, Options