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

 DANOPAR CONTROLS DYNAPAR HS2010248344D ENCODER W/CABLE

 DANOTHERM SV14/1100-3S HEATER ENCLOSURE 316 STAINLESS STEEL

 DARHOR DW21-S316-20 316 STAINLESS STEEL SOLENOID VALVE 2-WAY 3/4" NPT 110 V

 DARHOR DW21-S316-32 316 STAINLESS STEEL SOLENOID VALVE

 DARHOR DW21-S316-40 316 STAINLESS STEEL SOLENOID VALVE 2-WAY 1-1/2" NPT 110V

 DARHOR DW21-S316-50 316 STAINLESS STEEL SOLENOID VALVE 2-WAY 2'INCH NPT 110V

 DATA INDUSTRIAL A-1018-4026 SENSOR OPTICAL ISOLATOR

 DATA TECHNOLOGY ON-1500-40/5-114 ENCODER

 DATALOGIC SG4-14-060-OO-E SAFETY LIGHT CURTAIN PAIR

Datamax O'Neil 51-2456-00-SP A-Class G2 CCA Remote LCD Interface

Datamax O'Neil DPO15-2979-21 A-Class 4" Rib Supply Hub Assembly

Datamax O'Neil DPO51-2404-10 Scanning Mobility CCA Applicator

Datyon 2TGE4 Rectangular Fire Damper 11-3/4" x 23-3/4"

Dayco 116314 DC08-15RU22A45T 45° Bent Tube Female Swivel Hydraulic Coupling

Dayco 89163 Accessory Drive Belt Idler Pulley for BMW 128i 323i 325i 328i

Dayco 89430 Automatic Belt Tensioner Assembly for Chevrolet GMC

Dayco 89430 Automatic Belt Tensioner for Chevrolet GMC

Dayco Belt Tensioner 0081803 / TF100

Dayco BX89 Premium Industrial V-Belt

 DAYTON 1YNV2 REPLACEMENT MOTOR 1/2HP 1700RPM 115/230V

 DAYTON 24Y11 ROTARY DRUM PUMP

 DAYTON 2LY97B FLOOR FAN MOTOR 120V

Dayton 2TAE1 Galvanized Steel Cable 3/32" x 500ft Long Working Load Limit 200lbs

 DAYTON 2YEV2A 2HP CENTRIFUGAL PUMP

Dayton 338-426 / 89800 Trunnion Hub Lower Half

 DAYTON 35JF52 IEC ENCLOSED DISCONNECT SWITCH 32A/AMP 480/600V 20HP 240V-10HP

 DAYTON 3N469A CONDENSER FAN MOTOR 1 HP 208-230/460V 1140RPM ROT.CW/CCW

Dayton 3X645 84" Premium V-Belt B81 B-81

 DAYTON 4MU38 AIR CYLINDER

 DAYTON 4Z527E DC SPEED CONTROL

Dayton Continuous Duty Motor 1/20HP 1300/1500RPM 6JHX2 81834 71639665

Dayton Granger D/G 740007 Static Discharger Carbon Tip

DB Brakes DP545 Standard Left Front Brake Pads for Can-Am Yamaha

DC Cargo Mall 4" x 30ft Winch Strap w/ Flat Hook 430YWSFH 5,400lbs WLL

DC Sports SCS8008-4D Exhaust Flange

 DC SWITCHING UNIT # 4666X2-UL-DCUD SER. ULDC-596

DEA A2808 Front Right Engine Motor Mount Jeep Grand Cherokee Toyota Corolla

DEA A4521 Front Motor Mount for Acura CL Honda Accord

DEA A5412 Engine Mount Rear for Mazda Mercury

DEA A6775 Engine Mount Front for Kia Sedona 2002-2005

DEA A7302 Rear Motor Mount for Infiniti I30 Nissan Maxima

DEA A7349EL Front Engine Mount for Nissan Altima Maxima Murano

DEA Motor Mount A2493 Chrysler Dodge Plymouth 81-91

DEA Products Front Right Motor Mount 8234 for Mazda 323 1986-87

Dead Bolt KPL King Pin Lock T6 Tempered Aluminum fits all King Pin Couplers

Dean Pump Shaft 1138149 for RA3146 & RWA4166 Pumps  Made In USA

DeLaval 89492901 Pulley Repair Set D200

DELCO/FANUC D000S1 A06B-0513-B501 #8008 SERVO MOTOR

 DELCO/NDH BEARING 5309 BALL BEARING

Delfield BIM Scale Drip Pan 000-BIC-000R

Delfield Blender Pad VM Taller Raised Base Plate VMP00153

Delfield Float Switch HZP00042

Delfield Ice Maker Water Control Relay HZP00057

Delphi GN10314 Ignition Coil for Chevrolet Pontiac Toyota

Delta 060282A Pair Check Structure Kit

Delta 060794A Teck Fluted Handle & Screw Sub-Assembly

Delta 1101036N001-000 RF / Coaxial Connectors N Clamp Plug for 174, 188A/U

 DELTA 2-144N SOLENOID VALVE 24V COIL

Delta A27419S Guard Assembly for Contractor Saw

DELTA CPU V-TYPE 7.5-100HP CTL/B 3811095106

DELTA DOP-B05S101 TOUCH SCREEN B05S1016W1490058

Delta Parts 14-0778 A/C Compressor to fit CSE617

 DELTA PI PRESSURE TRANSDUCER 9030.1931 GERMANY

DELTA POWER HYDRAULIC D25M MOTOR

Delta R1000-UNWSHF MultiChoice Universal Shower Valve Rough In Body w/ Stops

Delta T11867 Ara 3-Setting 2-Port Diverter Trim Only *no valve Chrome Finish

 DELTACAB AE0000051705 CABLE CONNECTOR AE00000517

Deltana 12EFBU26D Door Extension Flush Bolt 12" L Solid Brass Brushed Chrome

 DELTECH MODEL D-0020-VF COMPRESSED AIR FILTER ELEMENT # D0020-VFE

 DELTROL EV125A EXHAUST VALVE 1/4" CYLINDER 1/8" INLET P/N 10135-67

 DELTROL EV125A2 EXHAUST VALVE 1/4"X1/4" P/N 10135-20

  DELTRON POWER SUPPLY # W106C

 DEMAG DEMATIK 46942944 FGB OVERLOAD

 DENISON A4D01-3203-B5W01-28 HYDRAULIC SOLENOID VALVE 115 V COIL

 DENISON A4D02-VA11-0103-40A5G0Q 12 HYDRAULIC VALVE

Denso 5540 10C30 Oxygen Sensor

 DEPARTURE QOL 7013 SUPER PRECISION BEARING

Depo 330-1952L-AS Driver Side Tail Light Assembly for 10-13 Ford Transit Connect

De-Sta Co 3CXT8 Through-Hole Mount Toggle Clamp 700lb Holding Capacity

DETECTOR 3 LIGHT CURTAIN 3LC06-3WS TRANSMITTER

Detroit Axle 515130 Front Wheel Hub & Bearing for Ford F-250 F-350 Super Duty

Detroit Axle K515024 515024 Front Wheel Bearing and Hub Assembly for Chevrolet

Detroit Axle P-1258 Front Brake Pad Set for 07-15 Ford Edge Lincoln MKX Mazda

Detroit Axle P-1377 Rear Ceramic Brake Pad for Ford Explorer Lincoln MKS MKT

Detroit Axle P-1508 Front Ceramic Brake Pad Set w/ Hardware for Ford Lincoln

Detroit Diesel A4710960380 Metal Seal

Detroit Diesel DDE R23527448 Oil Pump for Series 60 Engine 14L

Detroit Diesel DDE RA4720901550 HP Fuel Injection Pump HDEP GEN2

Detroit Diesel R23533595 Cylinder / Piston / Ring Kit

Detroit Diesel Vent Cap Wrench Spanner

 DEUBLIN 1106-200-009 ROTARY UNION

 DEUBLIN 1300-082B-002 SERVICE KIT

 DEUBLIN 257-000-284 ROTARY UNION 3/4" BSP RH

  DEUBLIN 357-000-223 LH ROTARY UNION ROTATING 1"

 DEUBLIN 555-000-396144 ROTARY ROTATING UNION 2-12LH

 DEUBLIN 6100-001C UNION REPAIR KIT

 DEUBLIN FS100 1-1/2" IN #150 END CAP KIT

Deutsch DTS26W15-05SN Circular Connector Plug D38999/26WD5SN

Deutsch HDP24-24-47PE 47-Position Circular Connector Receptacle Housing

 DEVILBISS PT-58 BEARING

Dexter K71-119-00 LH Drum Brake Kit w/ Bearings

Dexter K71-120-00 RH Drum Brake Kit w/ Bearings

DFC 1551-2173-00 5000 Advance Ceramic Front Disc Brake Pads for Cadillac Chevy

DFC Ceramic Brake Pads 10-1394-00

DFSK 1001200B0000 Rear Suspension Bracket w/ Cushion Assembly

Digi Sense 39001-06 Temperature RTD Probe

Digi-Sense 00274II / 847 549 7600 Temperature Probe 18-1/4" Long

DIGITAL STROBOSCOBE DT-2239A SPEEDOMETER PHOTO TACHOMETER NON CONTACT

Dimming Side Output 120/277V

Diode Negative Base TA22 EMD 712-9094-0 / 40053998

Dipaco Diesel Parts D113-7794 Bushing 3406

Direct Store Parts DG142 Stainless Steel Burners + Porcelain Steel Heat Plates

Disc Brake Pad Set 1310-1037-00 Drilled Slotted Rotor 631-39022L 631-39022R

Discharge Air Sensing Kit + Instruction BAYTUBE004A

Distributor Assembly 35003-YZJ for 1996-2000 GM Chevy 5.7L Vortec

Ditch Witch 302-9380 Cylinder Barrel

DIVERSIFIED ELECTRONICS CMB-120-AFA-1 RELAY 120VAC /  

Diversified Silicone 60' Durometer Solid Silicone Gasket .062" Thick .937" Wide

Dixon 25H300-200 Two-Sided Hex Wrench 3" x 2"

Dixon CFB2015 2" NPSH 100 PSI (Water Only) Constant Flow Fog Nozzle

 DIXON L74C-4MB OIL FOG LUBRICATOR

Dixon Quick Coupler BIG 3-1/2" Nut Size  See Pictures

DLCF002A Single Handle Single Cold Folding Swing Pot Filler Faucet 1/2" NPT

DLZ 20B201 Front Lower Ball Joint for Dodge Dakota Durango replaces K7267

D-M-E 240V 325W Heater Probe 90° Exit Lead AFIP5572-90 / AFIP557290

 DMG MORI SEIKI E76039B01 PC BOARD AP-DTP-BU

DMG Mori Y62418A03 Lock Nut FKN30 M30XP1.5

 DMIC CVH050500S22 STAINLESS STEEL CHECK VALVE 1/2" 10,000 PSI MAX

DMP 7063A-W Aqualite Series Keypad Blue LCD Proximity Short Cut Keys White

Do It Yourself Pulley System Weight Machine Cable Repair Kit 6mm x 3m Long

Dock Edge DE91113F 18" Torpedo Pipe Bumper Royal Blue

 DODGE 033195 SLEEVE FLANGE BEARING 2-BOLT SIZE 1-11/16" LT1000 2B 568423-001