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。

HONEYWELL VE4025A1210T Gas Solenoid Valve 1" 220/50 240/60 AC 20W Pmax 360 mbar

IMI Norgren 8254300.9304.23049 2/2 Solenoid Valve 3/4" 230V 40-60 Hz 0..16 bar

HANLA Level Co. FMS--WS-T Horizontal Level Switch with Tea Cup Test Device

NORGREN F68G Olympian Plus F68G-BGN-AR1 Compressed Air Filter G 1-1/2" Metal

Norgren F64B-NNN-AR0 Compressed Air  Oil Vapour Removal Filter

KKLE Mod 264-E01 Carbon Steel Relief Valve 0264-E01-MG 1" NPT set @ 1500 psi

ASCO C901104 2/2 NC Bronze Pneumatic Angle Seat Piston Valve 3/4"

MOBREY S01DB/F84 Horizontal Level Switch S01DBF84

SEETRU Type 616 Brass Safety Relief Valve 1" BSP SET @ 2.3 BAR

Burkert 0281 A1 FKM 00453882 2-Way NC Solenoid Valve 1" NPT 24V 50-60 Hz 232 psi

NORGREN F68G-8GN-AR3 Olympian Plus Air Filter G1" F68G8GNAR3 with Auto-Drain

SERVI AS 1STB4410J7B 2 position Manual Hydraulic Directional Valve 350 bar

Model KM-12PCT Korea Instrument  Precision Co. PCO Non-Flow Level Switch

Model KM-12PC Korea Instrument  Precision Co. PCO Non-Flow Level Switch

PSHN-46 NABCO Super-Spool 5/3 Way Closed Centred Pneumatic Hande Lever Valve 3/4

FESTO HGP-35-A Pneumatic Parallel Gripper 161 828 HGP35A

REXROTH Hydraulic Check Valve R900599966 SL 20GA 2-42

ASCO Series 8222 8222B54 2-Way NC Steam Service Solenoid Valve 1" 120/60AC

S Hydraulics CBGA-LHN Coterbalance Valve with ZTW Manif T-17A 3/4 NPT

S Hydraulics CBEH-LDN Coterbalance Valve with WKW / S Manif

NORGREN L68C-AGP-ERN Olympian Plus Compressed Air Lubricator 1-1/4"

WIKA Type 233.52.100 Cont 821.2.2.2 SF6 Gas Density Monitor with Alarm Contacts

PEMTECH S-384 H2S Gas Sensor Head S384 Pem-Tech S384 Gas Sensor Head for H2S

KEIHIN JDSPE5-15WLMF 2/2 NC Water Solenoid Valve 1/2" 220V50-60 Hz w M/O

Bank of 8 Valves SMC SV2100-5FU 5/2 Way Pneumatic Directional Valve 24V DC

0821300937 BOSCH Pneumatic Dump Valve NL4-SOV-G012-SOE-CON-SS G1/2 24V DC

ASCO SCE210D003 2/2 NC 3/4" General Service Solenoid Valve 110/50 AC 110/60 AC

ASCO Series 238 SCG238S416 2-Way NC Brass Solenoid Valve G3/4" 230V AC

REXROTH 3631290000 5/2-Way NW7 Hand Lever Pneumatic Directional Valve M14X1.5

NUMATICS R820G02F High Relief Precision Regulator G1/4 2-120 psi P.Max 10bar

ALCON E4600AB VIBRATION VALVE U.S. PAT. NO 3307394

ASCO 8210 Series SC821C087 2/2 NC 1/2" Stainless Steel Solenoid Valve 440/50 AC

HOKE Model 0722A4 Space Saver Geared Actuator 90° Spring Return Max 125 psig

SC Hydraulic Engineering APS Air Pilot Switch Valve APS-005-14-N-025 145-520

Bank of 8 Kockum Sonics 24721076 Solenoid Valve Cervitrol AB 40156025

IMI BUSCHJOST 8450400.0000 2/2 NC G1" Pneumatic Angle Seat Valve

R930000705 Rexroth 0453992000D VBSO-SEC150-20-PB-TA-D Cartridge Valve

Mann  Hummel 5341251121 Wire Gap Insert Gap width 0.05 mm 53-412-51-121

DANFOSS MBS 4510-1411-1CB12 060G2423 Pressure Sensor 0 to 2.5 bar 4..20mA 10..30

Schrader Bellows M05832451 3/2-Way 3/8" NPT Push Pull Manual Valve 3/8" NPT

KKLE 6010FEM01-KM-260 Bronze Safety Relief Valve 1" NPTM X 1-1/4" NPTF 260 PSI

DRUCK PTX 510 Pressure Sensor 0-400 bar G1/4 4..20 mA

Versa VSP-3401-316 3/2-Way 3/8" Stainless Steel Air-Pilot Pneumatic Dir. Valve

FESTO 197330 CPX50EF13GEQST21T21ZN Fieldbus Integrated controller module

Parker PCM800S Colorflow In-Line Pressure Compensated Valve 1/2" NPT 3000 psi

FESTO CPV10 Valve Terminal 16415 X 8  CPV10-GE-MP-8 18255 Electrical Interface

ASCO Series 327 SCG327A003 4/2 Way 1/4" Poppet Type Namur Solenoid Valve 10 bar

R901113683 Rexroth OD1532171AS00 2 Way Normally Open Hydraulic Cartridge Valve

Parker 73419AN2NNM0N0C111P3 5/2 Way 1/4" NPT Pneumatic Solenoid Valve 120/60 AC

MEIYO Electric Co. Ltd. Type SMP-MB Pressure Transmitter 0~4 kg/cm2 4..20 mA

MEIYO Type SMP-MB Wall Moted Pressure Transmitter 0- 50 kg/cm2 4...20 mA out

MEIYO Electric Type SMP-MBD Differential Pressure Transmitter 800 mm H2O

TRAFAG NAVITRAG 8202.77.2212 Pressure Transmitter 0 to 6 bar 0 to 0.6 Mpa

VERSA KXX-4334-K30-XI SP-D024 Pneumatic Directional Solenoid Valve 24V DC

PARKER DB123MTL 3/2-way 3/8" Pneumatic Solenoid Poppet Valve 220V AC 6VA

NORIS Type VD61 Pressure Sensor VD61-41.6M1 -1..1.6 bar

CKD APK11-25A-C4A Steam Solenoid Valve 2-Way NC 1" 220V AC

NORIS NORIPRESS Type VD61 Pressure Transmitter VD61-2.5 2.5 bar G1/4

IMI Norgren 2636265 5/2-Way Pneumatic Directional Control valve 1/4" 230V AC

NORIS Type VD61 Pressure Sensor VD61-2.5 0-2.5 bar I10...32 V DC 4..20mA G1/4

S HYDRAULICS SCCA-LBN Sequence Valve with EBA ISO3 Sandwich Body

ASCO F210C033KMB Air-Pilot Operated 2-way Normally Open Valve 3/8"

TRAFAG 8202.81.2210 NAVITRAG Pressure Transmitter 40 bar / 4 Mpa 4...20mA GL

323785-11 HOBART Drain Solenoid Valve 230V / 50 Hz Hot Water 0.5 bar pipe 11.5

Rexroth 5631270000 5/2-Way NW7 Hand Lever Pneumatic Directional Valve M14X1.5

ASCO PVG292A23 Petrol  Fuel Oil Solenoid Valve 1" 230V AC Dual coil system

FESTO CPV10 Valve Terminal 161415 x 4 161416 x 4 18255 Electrical Interface

ASCO WPHTB342C20 Series 8342 4/2-Way Solenoid Valve 1/4" NPT 110/50 AC

Endress  Hauser Liquiphant FTL260-0010 Vibration Level Sensor FTL 260-0010

HAWE Hydraulik Type VDM VDM3GNR Hydraulic Pressure Reducing Valve

KANEKO SANGYO M15G-8-AE12PU 4-Way 2-posn. Pneumatic Solenoid Valve 3/8" 110/60AC

S HYDRAULICS YSEA-LAN balanced piston sequence assembly reverse flow check

Rexroth 5711000300 Pneumatic Directional Valve CD12-5/2XX-SR-G012-G012-G018-S

AVENTICS CD12 3710760200 3/2-Way Air-Pilot Pneumatic Directional Valve

M06421859 Parker M0 Series 3-Way NC Pull Palm Button / Spring Return 1/4"

PARKER SSL3722 5/2 Way 3/8" Solenoid Pneumatic Directional Valve 24V DC

Fluid Power Energy FPE Model 0750 AL0750J12 Thermostatic Valve 3/4" SAE O-Ring

RWO Water Technologies VAGUBR340192 2/2 NC Bronze Angle Seat Valve 1/2"

ECKARDT Type 6191110 Reversing Relay E,A Max 20 psi Z Max 90 psi K Max 20 psi

MOOG ZDBDP06A4AT2BS/MB XZB10084-000-01 Modular Hydraulic Valve Pmax = 35 Mpa

NORGREN R27-234-RNCG Pilot actuated Precision Pressure Regulator 0.14 - 2 bar

NORGREN ISO Star SXE9574-Z71 ISO 2 5/2 Way Pneumatic Solenoid Valve 24V DC

TYCO Part No 1424266-1 Air Feed Kit Assembly

ASCO 8320A184MO Solenoid Valve 1/4" 120/60 AC with Push Button Manual Operator

ASCO EME210D009 2/2 NC General Service Solenoid Valve 3/4 " 24V DC 0.35- 7 bar

ASCO SC8210G035 2-Way Normally Open 3/4" Fuel Gas Solenoid Valve 120/60 AC

Rexroth 5652010000 V565-3/2NC-SR Pneumatic Directional Valve

RWO Water Technologies VAGUBR340194 2/2 NC Bronze Angle Seat Piston Valve 1"

WAHLER Type B Oil Temperature Oil Regulator Type 7095 45° 1-1/4" NPT

D1012H-23-A1 NORGREN Prospector Series 3 Way Pneumatic TIME DELAY VALVE

GA BRA Part # 022300009 39-171 4-Way Solenoid Valve 1/4" NPT 120V AC

Buschjost 8240380.9100 GEA WESTFALIA 0018-7388-600 Solenoid Valve G3/4" 24V DC

IMI Norgren Herion ATEX Solenoid Coil Id. Nr. 4612 4662 24V DC 162mA 3.9W

GEMS Type FS-550E P/N 020-3499 Bi-Directional Paddle Flow Switch

HATLAPPA RD232DTW3 2 Way Solenoid Valve G 3/8 1..50 bar 24VDC

KLAY SS316 ATEX Pressure Transmitter CER-8000-E-N-Ex-G2 57 psi

BEHR OIL THERMOSTAT M12530000100

EMERSON NRV-S-I LevelDatic Non Return Valve NRV ISO228/1-G3/4

EF8320511 ASCO 3-Way SS Ex-Proof Solenoid Valve 1/4" 24V DC 150 psi UL Listed

Norgren Prospector DA025C-CH 3/2 Way 3/4" Pneumatic Solenoid Valve 24V DC

ASCO E290A400 2/2 NC Pressure Operated Stainless Steel Angle Seat Valve G3/4

KIP P/N 1348-005 Float Level Switch 100W resistive 120-240V AC

HONSBERG MW3-020HK Stainless Steel Level Switch G3/4 PN10 250VAC/5A T Max 110 C

IMI Norgren 2401578 Direct Solenoid Actuated Poppet Valve

PARKER 483-1/2SS2-2 Hydraulic Check Valve

TAMROTOR MARINE NT0753 Pilot Valve 10-13 bar NT 0753

TAMROTOR MARINE NT 1561 Pilot Valve NT1561

SAGINOMIYA REV-1004DXF 2-way NC Solenoid Valve 24V 50/60 Hz 30kg/cm2 1/4"

R901255657 Rexroth Hydraulic Proportional Flow Control Valve

Rexroth 2991194080 Solenoid Valve 24V DC COIL LOCKED BY CLIPS

Endress Hauser PMC131-A22F1D10 Pressure Transmitter 0 to 100 mbar / 0...10kPa

PARKER ACP04AA008R1KTB Crimped Piston Accumulator with Gas Valve 260 bar max

ASCO EF8342G1 4-Way General Service Solenoid Valve 120/60AC 1/4" EF8342G001

HAWE VDM 3 GN Hydraulic Pressure Reducing Valve G1/2 40 LPM

ASCO Red Hat 8342G001 4 Way 1/4" General Service Solenoid Valve 110/60 AC

 ASCO Red Hat 8342G001 4 Way 1/4" General Service Solenoid Valve 110/60 AC

Trafag Picotrans 8244.79.2318 Compact Block Pressure Transmitter 0-16 kg./cm2

 ED IG 0.63A R27.2 Ω

Oil Control 05410610033500A Single Coterbalance Valve relief compensated

HAWE T3-1 Roller Mechanical Pin Actuated 3/2-Way Directional Seated Valve T31

060G3130 DANFOSS MBS33M Pressure Transmitter 0 to 60 bar 4..20mA

-FLOW PIS5000-2-A-S-2 SS Pressure Gauge Switch 0-150 psi

Barksdale 425N1-10 Pressure Transducer 0-1000 PSI 12-32 V DC 4..20mA

PARKER Pneumatic VE Series VE23-A-S-5 3/2-Way G1/4 Air Isolator Valve VE23AS5

NIVELCO RCP-401-3 Capacitive Vibration Fork Level Switch

NORGREN 9600210-4220-D 3/2-way NC 1/4" Brass Solenoid Valve ATEX Coil 24 DC 8.9W

Trafag Sensors NAVITRAG N 8202 Pressure Sensor 8202.77.2210 0 to 6 bar

ASCO Joucomatic G553A005MS 3/2-Way 1/2" BSP Pneumatic Solenoid Valve 24V DC

FESTO VPPE-3-1-1/8-2-420-E12 bar 557774 Proportional Air Regulator 0.02 to 2 bar

ASCO Series 8342 8342G701 4/2-Way Stainless Steel solenoid Valve 1/4" 120/60 AC

Spirax Sarco COLIMA TOR S Series TS15A210 Bilge Level Switch 5 m cable