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。

SQUARE D/TELEMECANIQUE XML E010U1C21 PRESSURE TRANSMITTER

INTERNATIONAL SAFETY PRODUCT INTREPID MK8 NON INSULATED IMMERSION SUIT IVERSAL

PENN 9146 THERMOSTAT RANGE 100-240°C

MAE HS200 2221 0210 AG04 STEPPER MOTOR 3400630160

PAN-GLOBE e904-102-030-000-1 DIGITAL TEMPERATURE CONTROLLER 24VAC/DC 400°C MAX.

DOOSAN 110922-00205 GUIDE ASSEMBLY RAIL FOR DOOSAN FORKLIFT

PARKER 316 120B T1111 ELBOW 90° -  .

PARKER 289T STAINLESS STEEL TUBE FITTING -  .

ELESA HCX.127-SST-M12 LEVEL INDICATORS TRANSPARENT TECHNOPOLYMER -  

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

GF 761069204 INSTAFLEX ELECTRO FUSION COUPLER PB 40

ASTREL GROUP PFSELI05C071 CAPACITIVE WATER LEVEL SENSOR

REXROTH BOSCH R900306349 SEAL KIT WH 22.6X/7X/

MAN BW DIESEL 343A-C THROTTLE VALVE FOR ENGINE TYPE 6L60MCE -  

ACeS FR-190G PCB ACEP0051 REV C

ZELLWEGER ANALYTICS ENFORCER 2302B0650 PORTABLE GAS DETECTOR CALIBRATOR

INGERSOLLRAND 30285688 PLGER

SKF FY 507 M SQUARE FLANGED HOUSING FOR INSERT BEARINGS CAST IRON -  

GRDFOS 96547649 SPARE BEARING RING D17.37 / D10.09 X13MM -  .

MARAKA ANTENNA CO. MB-311B TV FM RADIO AMPLIFIER

MKK TKB-16LJ 0600068000 DIAL KEY BOARD

ADP H2311 BEARING ADAPTER SLEEVE -  

NX7 IO TEST JIG 16DO PATCH PD240-0

NORGREN ISO STAR VALVE SXE9773-A60-00B 10BAR

SPERRY MARINE 1000656-1 BRIDGE MICROPHIT OUTDOOR BMU002 VOYAGE DATA RECORD

AALBORG 8002-1-10 FLUE GAS THERMOMETER 0-500°C

DWYER  MEGNEHELIC DIFFERENTIAL PRESSURE GAUGE 0-20 INCH

MATSUSHITA ELECTRIC AK-TZ2(A) FAN MOTOR 4P 4W 50-60Hz 100V

SWAGELOK SS316 ITE ELBOW TUBE FITTING, TUBE OD 8 MM X 3/8 in - LOT OF 7

VALMET ATB16/T MODULE 8914012

GRANZOW 21EN4K0V105 SOLENOID VALVE 1/2NPT 1.4-290 PSIG

GILMORE VALVE NOV 7401895 SEAL KIT PROSERV 25940 SK

TLV 040 ORIFICE FOR JH7.5/NJH7.5X STEAM TRAP

ALCO CONTROLS XB 1019 HW-1B THERMO EXPANSION VALVE

PHOENIX CONTACT SGA-02 SOLID STATE RELAY A2B00029382-03_A2

PHOENIX CONTACT EMG 30-SP-4K7LIN SETPOINT ADJUSTER 2940252

KONGSBERG 540-063488 O-RING, LARGE, 400MF, 380.3X6.99 MIL 413B

OMRON SDV-FH6 VOLTAGE SENSOR

MAN BW DIESEL 343A-31 BALL COCK -  

SPIRAX SARCO HB0812310 VALVE P.MAX.400 BARG T.MAX.350°C 316 S.S

MITSUBISHI KOJ1-E32DR-C SEQUENCE CONTROLLER DC 24V

A.U.K MULLER 40.012.111 DISPENSE VALVE, DIN 12, 24V, 0-60 MBAR

HAN JEONYEOL SYSTEM HANH THERMOCOUPLE, ELEMENT K(CA)

AHFX-0001-6000 LOW PRESSURE BALL VALVE

SMC VPA544 AIR OPERATED VALVE 2~8 kg/cm2

SMC AF60-10-2-A FILTER,MODULAR,AF MASS PRO

S HYDRAULICS CXDA-XCN  FLOW NOSE TO SIDE CHECK VALVE

HONEYWELL C7027A1049 U.V. SENSOR

MARINE AUTOMATION SYSTEM-MAS 2600/2P TRANSDUCER AMPLIFIER

CROUZET 88256585 PANEL MOT SINGLE FCTION TIMER RELAY -  

FESTO MFH-5-1/4 PNUEMATIC SOLENOID VALVE 5/2 WAY 6211

CALEFFI 624000 IMMERSION SAFETY THERMOSTAT WITH MANUAL RESET

KIDDE FIRE DS-PS ADDRESSABLE SMARTPROTOCOL PHOTOELECTRIC SMOKE DETECTOR

DAIICHI KEIKI 21-F50708 GLYCERINE FILLED PRESSURE GAUGE - 100MM DIA-G1/2

BALDOR DODGE D-FLEX 5S X 5/8 COUPLING 004500

CONZERV ELF 3259 VAF POWER DIGITAL METER

MILJOCO CORP. V20664002 WASH TEMPERATURE GAUGE 100-220°F

SIEMENS LAE10 BURNER FLAME DETECTOR COMBUSTION FLAME SENSOR SAFE GUARD

ORIENTAL MOTOR 4GN30K GEAR HEAD

OKI FD-6111 HEAT DETECTOR

HONEYWELL BURNER CONTROL S7820A1007 REMOTE RESET MODULE

GESTRA THERMOSTATIC STEAM TRAP 1/4" NPT -  .

MTL 3043 DC ISOLATOR 1/40mA

NORGREN RM/28025/25 PNEUMATIC SINGLE ACTING ISO CYLINDER

K357122 PCB CARD 375405G02

DRAGER X-am 3000 CHARGING CRADLE FOR 4543630 / 8317784 POWER SUPPLY

DANFOSS EVR15 SOLENOID VALVE 032F1225

SOCOMEC CURRENT TRANSFORMER TCB 32-40 750A/5A CLASS 0,5 10VA

SIEMENS 6ES7922-3BD20-0AB0 FRONT CONNECTOR FOR SIMATIC

BLUE-WHITE F-550 ACRYLIC FLOWMETER F-55750L

FEDERAL SIGNAL 50GC SELECTSPEAKER AMPLIFIER 24V

BOLL  KIRCH FILTERBAU 4.36.2 DIFFERENTIAL PRESSURE INDICATOR 0.9TO 1.2 BAR

ALCO TLE 4 X-29842 FW55-15B EXPANSION VALVE ASSEMBLY

EDWARDS SIGNALLING 50LMP-40W REPLACEMENT BULB P041695-0108 - LOT OF 6

FUJI TEMPERATURE CONTROLLER PXR4TAS1-0Y000

MULTI RANGE TIMER BY PANASONIC TYPE PM4S A2C30H AC 120V

SAUERMANN Si-30 CONDENSATE REMOVAL PUMP

SAUERMANN Si-30 CONDENSATE REMOVAL PUMP

SEETRU 359530000 SAFETY RELIEF VALVE

ASCO 31680 SOLENOID VALVE 1/4" WITH DANFOSS BY024CS SOLENOID COIL

SIFAM 126664 0080 ANALOG TEMPERATURE PANEL METER - 0 TO 100 °c

Riken Keiki Gas Detector GX 2001 Charger

WABCO 3712030000 PNEUMATIC DIRECTIONAL CONTROL VALVE

REXROTH MNR 3723522220 12W37 PNEUMATIC DIRECTIONAL VALVE 24V

PEPPERLFUCHS KFA6-SR2-EX2.W SWITCH AMPLIFIER

PHOENIX CONTACT MCR-C-UI-UI-DCI ISOLATION AMPLIFIER 2810913

DANFOSS EVM NO SOLENOID PILOT VALVE

MARIN ELEKTRONIK FERRET-RS NMEA FILTER 10-33V

WEIDMULLER RS F34 LP2N 5/34 INTERFACE BOARD 34 POLE 0224361001

REXROTH R412006120 PNEUMATIC REGULATOR AS2-RGS-G038-GAN 0.5 TO 10 BAR

ALTRONIC ETN-3 LEVEL ELECTRODE

SKON 0-7000 PSI STAINLESS STEEL LIQUID FILLED PRESSURE GAUGE

SWAGELOK SS 63TS8 STAINLESS STEEL BALL VALVE 1/2" SWAGELOK TUBE FITTINGS

OMRON CQM1-MEO4K MEMORY MODULE

KELD STX3 TOUCH TEMPERATURE CONTROLLER KLT33IDTR230

REXROTH 3722250220 PNEUMATIC DIRECTIONAL VALVE

HONEYWELL AURORA-T PET IMME PIR MOTION SENSOR

ESCHENBACH OPTIK 1174 MICROSCOPE WITH ILLUMINATION 30X

FUJIKOKI FME R22 THERMAL EXPANSION VALVE

WIKA TRONIC LINE 891.13.500 PRESSURE TRANSMITTER

SIEMENS 3VA9267-0GK00 ROTARY OPERATOR WITH SHAFT STUB

PELCO BNC-BNC RACK MOT 20 COUPLING PANEL

KEPNER 1706C-1-5 ACR  FLOW CHECK VALVE

BRADY IVERSAL BALL VALVE LOCKOUT - 8' SHEATHED CABLE  LARGE BLOCKING ARM

CKD 1138-8C-E LARGE AIR FILTER

NOHKEN FP-1A LEVEL SWITCH AC 250V 10A

DE-WIT W-210 DIAPHRAGM TYPE GENERAL SERVICE SOLENOID VALVE

ARATRON HYDRAULIKK AS ABP6 BLANKING PLATE NG6

ARROW HYDRAULICS TV-P-02M MODULAR FLOW CONTROL VALVE

AMOT CONTROLS 4057D023H1 TYPE CE 3 WAY PILOT VALVE

RS 224-206 RACK MOT CASE 1U 19 INCH 44X254mm

REXROTH GFT 220-T3-2134 BRAKE SEAL KIT

CONSILIUM TDT-2K HEAT DETECTOR

ADVANCED CONTROL TECHNOLOGY LIQUID LEVEL FLOAT SWITCH

BAUR ELEKTRONIK ISN 42 CONTROLLER 4-20MA

GESA CI.1.6 EN 837-1 PRESSURE GAUGE RANGE -1 TO 9 BAR

TK-WL-CO ELEVATOR WEIGHING SENSOR

ALH-4LBN PRINTED CIRCUIT BOARD -  

TYCO 517.050.041 4B 4" DETECTOR BASE -  

ENVIROCHEM FLPWC-123 FLOAT PRESSURE WASHER ASSEMBLY

BAUMER ELECTRIC DI 12.82.01/1 NAMUR INDUCTIVE PROXIMITY SENSOR

CARRIER TRANSICOLD 12-00395-01SV THERMISTOR SENSOR

PANASONIC FP0 POWER IT AFP0634 FPO-PSA4

CONTROL PRODUCTS 2A2649-01 CPI REV.E ICE MACHINE TIMER CONTROL BOARD

REXROTH R412007620 NL1-RGS-G014-GAN-100 T=-30°CEL PRESSURE REGULATING VALVE

FEINSIEB OV PN16 STRAINER DN8 -  

ELECTROMATIC S-SYSTEM SC 215 115 SHOT TIMER 0.15-3 SEC - 120VAC/45-65Hz/2W

EGO 55.17022.030 THERMOSTAT, RANGE 30-110°C

HONEYWELL V5833A1029 CONTROL VALVE 3 WAY DN15 PN16

ELECTROLUX 0D2721 GEAR WHEEL,14 TEETH

ELECTROLUX SENSOR 487174959

CLEAR COM MODEL 400 MICROPHONE