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。

R431003559 REXROTH P-55028 Pneumatic Check / Non-Return Valve 1" NPT 250 psi

Norgren SuperX X4 225500000 5/2-Way G1/4 Pneumatic Solenoid Valve 24V DC

RP920B1007-2 HONEYWELL Pneumatic Controller RP 920 B 1007-2

ATOS DHI-0713-23 Hydraulic Directional Valve 24V DC

Parker Kuroda AS2406-02-100-15CKU-MKK Directional Solenoid Valve 1/4" AC100V

NORGREN SH 1504-000 5/2-Way 1/2" Manual / Spring Pneumatic Hand Lever Valve

HAWE Hydraulik Type RH RH2 Releasable Hydraulic Check Valve G3/8

IMI Norgren 11-818-110 Precision Air Regulator G1/4 0.4 to 10 bar 5-150 psi

HAWE Hydraulik Type DRH DRH3 Releasable Twin Check Valve G 1/2" BSPP

TRAFAG Navistat Thermostat Type 414.2509 Temperature Switch

CompAir Maxam Series 5 705207 10M 5/2-Way Solenoid valve 1/4" 240V AC 8W

TRAFAG Picotrans 8264.77.2318 Pressure Transmitter 0...6 bar Manif moting

VERSA P/N 1401-0200 Drilling Controls Inc. 3-Way Solenoid Valve 120V DC 9.5W

Parker LB43313TF AN Legacy Pneumatic Solenoid Valve 3/2-Way G1/8 24V DC 10 bar

ASCO 8317G053 3 Way 1/4" Normally Open Quick Exhaust Solenoid Valve 120/60 AC

MAC 200 Series 225B-110CCAA 3-Way 1/4 NPTF Solenoid Valve 120/60 AC 24V DC

Endress  Hauser TR10 Modular RTD thermometer -50... 400 deg. C 1 x PT100 L= 100

DEUBLIN Rotating ion 157-059-021 SC/SC 3/4-16 F RH 157059021

SMC PF2A711-03-67 Digital Flow Switch for Air 3/8" 10-100 LPM

SMC PF2A721-F03-67-M Digital Flow Switch for Air 3/8" 20-200 LPM

Aventics 2991169410 3/2 NC G1/8 Air Solenoid Valve 0498319718 24V DC 10W 10 bar

FAIRCHILD Model 14 Positive  Negative Bias Relay Catalog No. 14223

THT834910 Asco 4-port Pneumatic Solenoid Valve 1/4" 24 DC 125 psi

Rexroth Mecman 565-301-000-2 5653010002 3/2 NC Pneumatic Directional Valve 24V

TAIYO SOLENOID COIL 70X80X138.5 K-WL71-0C-100 100V AC

Model WX-18B-750J/HH61 NASON Pressure Switch

D2T-A150SS Barksdale D2T Terminal Block Diaphragm Pressure Switch 1.5 to 150 psi

MERCOID CS-3 Series CS Diaphragm Pressure Switch 1-100" w.c. Deadband 7" w.c

REXROTH 0820018991 Pneumatic Directional Valve 3/2-way 1/4" 220V AC 50/60Hz

ASCO 8210G012 2-Way 1/2" Normally Open Gen. Service Solenoid Valve 480V 60Hz

ECONOMETER 376.301.01.591 Differential Pressure Monitor 17.2 bar / 250 psi max

TAIYO SOLENOID COIL K-WL71-00S64 100V KWL7100 K-WL71-00 w Manual Operator

Rexroth PD-2 DRAIN P52901 Pneumatic Air Control Valve 1/4" NPTF

Burkert 158942 6527 H06,0-FM17-0000-B0-024/DC-02 *MA10 5/2 Way 16mm Valve 24V DC

SIKA VH500 series VH 500 NM Paddle Flow Switch for Liquids M33X2 GL VH500NM

SIKA VH500 VH500NM3451M41 Paddle Flow Switch for Liquids M33X2

Endress  Hauser Liquiphant FTL 260-1120 Vibration Level Sensor FTL260-1120

TOYO-OKI Replacement Solenoid Coil Assembly AC100V 50/60Hz AC110V /60 Hz 2-pin

NORGREN D1012B-CY Prospector Solenoid Valve 3 Way 1/4" 120V AC 150 psi

AVCON 9100F254 2-Way NC Stainless Steel Solenoid Valve 1" 110V AC 50 Hz

Burkert Type 0124 021660 2-Way Agressive Media Solenoid Valve G1/4 24 VDC

FW Murphy 10703691 A25T-250-10-1/2 Temperature Swichgage 250°F /120°C

WABCO Rexroth 3630070000 NW7 3/2-Way Roller Lever Pneumatic Directional Valve

ASCO WPE210C007 General Service Solenoid Valve 1/2" BSP 240/60 V AC

VAN AIR E101/102-500-RC 26-3017 REPLACEMENT SPARE FILTER ELEMENT

VAN AIR E101/102-500-RB 26-3016 REPLACEMENT SPARE FILTER ELEMENT

NASON Pressure Switch Model WX-18A-50J/HH131

HAWE Hydraulik Series BVG1 BVG 1 R-T-1/4 Mechanical Directional Seated Valve

SMC Solenoid Valve VPW2156 2-Way NC Brass 3/4" 48V AC with Manual Operator

GEMS Intrinsically Safe Pressure Transmitter 221CBGH4002FBEA 4000 psi

Swagelok Cajon SS-810-3 SS316 ion Tee 1/2 in. OD Tube Pack of 5 pieces

NORIS VD71-16 P # 7656832 Pressure Transmitter 0..16 bar 10...32 V DC 4..20mA

ASCO G211C035V 2-Way Normally Open Solenoid Valve 3/4" 110/50 AC

IMI Norgren Super X X422550G000 5/2-Way G1/4 Pneumatic Solenoid Valve 24V DC

IMI Norgren Super X X422550G000 5/2-Way G1/4 Pneumatic Solenoid Valve 110V AC

Norgren Nugget K41EA00KS1KV2 3/2-Way 3/8" Pneumatic Directional Valve 120/60 AC

FESTO ADVUL-40-100-PPV-A 15620 Pneumatic Cylinder 40 mm bore x 100 mm Stroke

Gems Sensors LS-270 P/N 43765 Vertical Moting Single Point Bilge Level Switch

HAWE Hydraulik MVS Series MVS52C Pressure Limiting Valve G3/8" Range 315 bar

IMI NORGREN Herion 2636047 5/2-Way Solenoid Actuated NAMUR Valve without Coil

NORGREN SXE9573-Z70-80 33N ISO1 5/2 Pneumatic solenoid Valve 24V DC

Sidel Type 2911 Art 245.823.00 011552745502/B Solenoid Valve 24V DC 15...40 bar

TRAFAG Navistat Thermostat Type 414.2611 Temperature Switch

TRAFAG NAVISTAT Type 471.2323 ISNT11011 Temperature Switch 20-110° C

ODE 21W3KB190 2/2 NC Solenoid Valve G3/4 without coil

SAGINOMIYA CMV-C302GQ2 Air Solenoid Valve 1/4" 24V DC 0.98 Mpa

SAGINOMIYA THERMO EYE DLE-WD11-010 ELECTRONIC THERMOSTAT -40° to  20°C

Parker KURODA PCS2406-01-100-TC2 Pneumatic Directional Control Valve AC100/110V

END ARMATUREN DG2D3121025 2-Way Pneumatic Pressure Actuated Angle Seat Valve 1"

BURKERT Typ. 0654 C NBR 3/2-way sub-base moted ATEX Solenoid Valve 24V DC

OVENTROP 1085208 Differential Pressure Relief Valve 50-500 mbar 25 mm 1"

LC L51L0Y301A0M200 CETOP 3 Manual/ Spring Hydraulic Directional Valve w/o handle

Parker Lucifer 131VS605 3/2-Way Stainless Steel Solenoid Valve 240/60 AC 15 bar

CKD FS1-04-3-AC100V 3/2-Way 1/2" Pneumatic Solenoid Valve 100V AC 1 Mpa

SLS INDUSTRIESERVICE 1064646 5/2-Way Pneumatic Solenoid Valve G1/4 230V AC

HERION Fluidtronik Spare Proportional Solenoid 24V DC for Valve 4088210 7040

0820022126 Rexroth Pneumatic Directional Valve RA18-5/2XX-SR-024DC

0820022026 Aventics Pneumatic Directional Valve RA18-5/2XX-SR-024DC

R983031201 Rexroth 4WE6 J 6X/E G24N9K4 Hydraulic Directional Valve 24V DC

WANDFLUH AERVA6 Modular Sandwich Type check Hydraulic Valve P. Max 350 bar

TEAMTEC Art No. 8126 2/2 NC G1/4" Solenoid Valve 230/60 AC

VICKERS EATON RV2-10 Hydraulic Relief Valve RV2-10-C-3G-3

HYDAC WSM 06020 ZR-01-E-N Solenoid Cartridge Directional Valve 230V AC

TRAFAG PRESSOSTAT 912.2378 Adjustable Pressure Switch 1...10 bar G1/4

OASE Multi-Jet Nozzle Parasol of Jets 10-3T Art.-No. 673-500 R 1"

STORK SC15600S110-1 P/N 357350 COMBISTAT Adjustable Temperature Switch 0-120° C

Parker Lucifer 321K4106 481865K8 2/2 NC G1/4 Solenoid Valve 115V 60Hz 8W

Parker Lucifer K series 321K4106 481865A5 2/2 NC G1/4 Solenoid Valve 110/50 AC

YUKEN DSG-01-2B3-D24-N-7094-L Hydraulic Valve 24V DC DSG012B3D24

SERVICE FIRST TDR00495 OEM Pressure Transducer 0-70 psia AKS1008 060G633505

TRAFAG PRESSOSTAT 900.2675 Pressure Switch G1/4 0.2-2.5 bar

Parker HPA Series HPA.4819.100 High Pressure Filter Assembly G1/4 280 bar

ASCO EAXB223A25V Red-Hat EX Solenoid Valve 1/4" 24V DC 22.6W 70-3500 kpA

ASCO XE210C094BW 2/2 NC G1/2" General Service Brass Solenoid Valve 415/50 AC

IMI Norgren Buschjost Cat No 3902 Replacement Solenoid Coil 230V 40-60 Hz 45VA

Bank of 10 nos SMC Pneumatic VQ2M1-5G-C8 Manif Moted Solenoid Valve 24V DC

ASCO Red-Hat 8210G93 2-Way NC 3/8" General Service Solenoid Valve 24/60 AC

SCHNEIDER AMT013952-04 SF6 Gas Density Monitor 0...2 bar abs with elec contact

BARKSDALE Pressure Switch P/N 0417-09 Type 8141-PL1-B-LH-ES 160 bar setpoint FLG

ASCO 8262H174 2-Way High Pressure Solenoid Valve 1/8" 120/60 AC 500 psi Air

Norgren F64G-NNN-AD3 Olympian Plus Compressed Air Filter Auto-Drain

BARKSDALE 9021-M 4-port 1/4" Manual Closed Center Pneumatic Directional Valve

 in Bag  AUTOMATIC VALVE AV D2003ACWR-P NAMUR Valve 5/2-Way 1/4" NPT 24V DC

PARKER 133 CN 2-Way NC Diaphragm Pilot Operated solenoid Valve 3/4" 230V AC

IMI Herion Norgren 2636000 5/2 Way G1/4 Solenoid Valve 1-10 bar 230V 50 Hz 15VA

R983070419 Rexroth Manual / Spring 5 port 2 position Hydraulic Control Valve

PARKER LUCIFER 341L9534 3/2-5/2-Way NAMUR Solenoid Valve without Coil

Parker KURODA PCS2406-02-100ZC-TME 5/2-Way 1/4" Pneumatic Directional Valve

ASCO 8340A1 Solenoid Operated Pneumatic Directional Control Valve 1/4" 24V DC

HAWE Hydraulik KR2-1 Cam Roller Actuated Directional Seated Valve KR 2-1

BURKERT 6211 A13.0 NBR MS 140874 Solenoid Valve G3/4 RS 370-0135 230V AC

HYDAC VD5 GC.0/-V-113-LED-SP Differential Pressure Filter Clogging Indicator

DANFOSS MBS 3250 060G1733 Pressure Transmitter 0-400 bar Out 0-10V

10242P Fairchild Model 10 Pneumatic Precision Regulator 1/4" NPT 0-60 psi

ASCO 8210G012 2 Way Normally Open Solenoid Valve 1/2" 120/60 AC 5-200 psi

FESTO MOFH-3-1/2 7884 3/2-Way 1/2" Normally Open Solenoid Valve w/o Coil

Burkert Typ 6014 153010 SS Solenoid Valve 3/2-way G1/4 230V AC/DC RS 4104566

GEMS / DELAVAL Type FS-600 P/N 020-2419 Bi-Directional Paddle Flow Switch

Parker 529411000 Push Button / Spring Return Pneumatic Control Valve 1/4"

Norgren L68M-NNP-ERN Olympian Plus 68 series High Flow Air Lubricator L68MNNPERN

TRAFAG 900.2675.901 Pressure Switch G1/4 0.2-2.5 bar 0.02-0.25 MPA

HAWE Hydraulik MVS Series MVS53E Pressure Limiting Valve G1/2 80 bar

ASCO F262B106K Air-Pilot Operated 2-way Normally Open Valve 1/4" 125 psi

GALI GmbH Ref # 9480024 Engine Start Solenoid Valve 3-Way 1/4" 24V DC 30 bar

HUBA Controls 507.930013111 Pressure Transmitter 0 to 10 bar G 1/4" 4...20mA

END Automation DG2D3121025 2-Way Pneumatic Pressure Actuated Angle Seat Valve 1"

Burkert Type 6527 P/N 156337 5/2-Way Pneumatic Valve 16 mm 24V DC 2..10 bar