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。
NETGEAR GS116 PROSAFE 16 PORT GIGABIT ETHERNET SWITCH W/ CORD DC 12V 1A GS116V2
AMERICAN DYNAMICS AD1472MIN 120V VIDEO SWITCHER
SIMCO RAMIC SRC 94-156250-011 | FIRE ALARM CIRCUIT BOARD CARD | 94156250011
WESTELL DTWA528-0412L4 VAM72C0ARA W/ TWO HRU-402 REM ITS W/ 771-000255 AK
EMERSON 02-790889-09 REV 3 P/L 1 V I CONDITIONER CIRCUIT BOARD 0279088909
Symbol Link LL-390 symbol scanner with module and cables LL-390-IK0DA / A434748
SIMPLEX 2190-9163 .04A ZADAPTER MODULE FIRE ALARM 28VDC 21909163 AK
MONACO ENTERPRISES ETCH 171-158-00 REV. D CIRCUIT BOARD CARD FIRE ALARM 17115800
HP HEWLETT-PACKARD MODEL: C3170A POWER SUPPLY S/N: 3252L07769 MAX 95W
Square D EDB EDB34045 3 Pole 45 Amp 480V Circuit Breaker
GE THQD THQD32125 3 Pole 125 Amp 240V Circuit Breaker Flawed #35
DM S GE THQD THQD32125 3 Pole 125 Amp 240V Circuit Breaker Flawed #35
Pall F-513 F513 Filter Element
BOSCH D1260W KEYPAD WITH SOFT KEYS ACCESSORY INDOOR DRY 12VDC 225MA
EMERSON 02-790873-00 | FIRE ALARM CIRCUIT BOARD | 0279087300 - KMGM -
ACI CONTROLS INC. 098804 REV C 804 CIRCUIT BOARD CARD PCB CONTROL
IWATSU E-T0763C5 E-T0763B5G4 CIRCUIT BOARD VTA REV 4 EOI 8404 PA HA NT
CARRIER HF21BZ015 DAMPER MOTOR 24 VDC AK
LOT OF 12 SIEMENS 3TX7144-1E2 SOCKET 15 AMP 8 PIN OCTAL AK
of 97 ERICO CADWELD 740 Pipe Sleve Clips
SIMPLEX 562-550B McCULLOH LOOP FIRE ALARM CIRCUIT BOARD CARD 562550B
CUMMINS 327-1265 ONAN PCB ASSEMBLY CIRCUIT BOARD CARD
SNAP-TITE SPHN-24 316 STAINLESS SNAP-TITE CPLG HOSE PLUG SPHN24
ROCKWELL GOSS E17994-1 | TRANSLATOR FIRE ALARM CIRCUIT BOARD CARD | E179941
SIMPLEX 2099-9788 RED MANUAL PULL STATION FIRE ALARM 0630511 BG-50
TOSHIBA PX12-40650 IMAGING CIRCUIT BOARD FCTION YWA2149*B PX1240650
SCHNEIDER 140XBE10000 TSX QUANTUM XBP EXPANDER MODICON 140 XBE 100 00
HONEYWELL MP953D1107 2 8541 PNEUMATIC VALVE ACTUATOR SPRING RANGE 8-13PSI MP953D
FALK 60T HUB 31 2.375.713017 STEELFLEX COUPLING
Transmation Control it 3654T 799631
Tel-Tru Thermometer AA575R 1/2" NPT Stem Length-6 Inches Range: 50-250F
SWAGELOK BEAMEX TUBE FITTINGS 3/8" OD MALE NPT
WESTINGHOUSE BA-400 CONDENSER STYLE 310C197G04 BA400 S#310C197G04
SCHNEIDER ELECTRIC T.A.C TS-9422 | SOLID STATE DUCT SENSOR 22FT LONG | TS9422
SPEARS LOT OF 10 4202-101SR FLAMEGUARD SPRINKLER HEAD TEE AK
PARAGON 8141-00 DEFROST CONTROL TIME INITIATED 1N.O. 2N.C. 120V 60HZ 40A AK
PARAGON 8141-00 DEFROST CONTROL TIME INITIATED 1N.O. 2N.C. 120V 60HZ 40A AK
EXITRONIX VLED-U-WH-EL90 THERMOPLASTIC LED COMBO EXIT FIRE ALARM
SOURCE 1 S1-03101954000 TIME/TEMPERATURE CONTROL DEFROST AK
Cutler Hammer C323CM2A Series A1 2 Wire Control Module 120V/60Hz AK
THYSSEN KRUPP ELEVATOR 6300JG1 PCB 630HW5 REV B 24V I/O EXPANSION CIRCUIT BOARD
GE GPS2BSAS MANUAL MOTOR STARTER RANGE 28-40A
5 Thomas Betts H050A 1/2" Hub Aluminum
ALTRONIX AL800LGK9E NAC POWER EXTENDER CONTROL CIRCUIT BOARD CARD AK
RAMSEY CONTROLS BN117 CHOPPER MODULE
SIMPLEX 2099-9796 PS MAP 2 BREAK GLASS 0630596 FIRE ALARM
OMRON ESEN-R3HMT-500-N TEMPERATURE CONTROLLER N1875 FLAWED
Eaton Westinghouse GHB GHB2050 2 Pole 50 Amp 480/277 V Circuit Breaker
Eaton Cutler Hammer QBGF QBGF2030 2 Pole 30 Amp 120V Grod Fault Breaker
RED LION HESS0000 | FIRE ALARM POWER SUPPLY AND SPEED SENSOR | HESS0000
THERMO ELECTRON CORP 080017 ORION CALIBRATION SLEEVE FOR DISSOLVED OXYGEN PROBE
SIEMENS TPS-ESA3 SECONDARY SURGE ARRESTOR E103120 277-480AC TPSESA3
SQUARE D 9001SKY315A CONTROL STATION FIRE ALARM AK
DIXON AM11 BARBED AIR HOSE COUPLING 1" CROWS FOOT AIR KING AIR/WATER
SQUARE D 8536SCO3S MOTOR STARTER NEMA SIZE 1 SER. A 1 NC. 1 NO. 9999SX6 NTO
EVENLITE RZR3SDRUBA1B EXIT SIGN RED LETTERS
ZJZJ ABOVE GROD IRRIGATION GARDEN LAWN SPRINKLER SYSTEM WATER X0042MYU3L
SIMPLEX 562-854 B | MASTER MOTHERBOARD CARD ASSY. EP-6 94 V-O | 562854B
Hubbell Prescolite 4LFLEDPB LED light fixture 4LFLED6G435KWT LAMP AK
Westell DTWA528-04 Rev L Kendal Point Drive 4-Position Digital Wall Mot
HES ASSA ABLOY 5000C-12/24D-630 ELECTRIC DOOR STRIKE BODY W/ FACEPLATE KIT
OF 10 ERICO CADWELD 90 WELD MATERIAL COPPER TO COPPER COPPER TO STEEL
SIEMENS FS-DB2 CIRCUIT BOARD CARD FIRE SEEKER DISPLAY BOARD AK
CH EATON WESTINGHOUSE EHD EHD3015 3 POLE 15 AMP B/S CIRCUIT BREAKER NTO
LIEBERT EMERSON 03-790831-94 INTERFACE CIRCUIT BOARD 0379083194 KMGM
N-Tron 405TX Ethernet Switch w/ CD 5 Port 10-30VDC 0.25Amps 65SN
SIEMENS MPS-12 Power Supply Module 315-092030 Cerberus Pyrotronics Fire Alarm AK
JOHNSON CONTROL IOM3731 INPUT OUTPUT MODULE AK
Exide Electronics 101073071-001 Circuit Board Card 101073071001 KMGM
Hubbell Prescolite 4LFLED6G43 LED light fixture 4LFLED6G435KWT 4LFLEDPB LAMP
ASCO 8320G184 SOLENOID AND AIR-CONTROLLED VALVE 120V/60Hz 110V/50Hz A314580
ABB MODEL 30 | FIRE ALARM DISPLAY ASSEMBELY 124U2254-1 | 124U22541
LIEBERT EMERSON 02-790809-00 | SS SCR FIRE ALARM MONITOR CIRCUIT BOARD | KMGM
ASCO D8260G53E SOLENOID VALVE 6.1 WATTS/60HZ 8.1 WATTS/50HZ
VERSA ESM-8012-44-H-HC-3-D048 SELECTOR VALVE ESM801255HHC3D048
VERSA KSG-4332-6K-LB-XX-D024 4-WAY VALVE KSG43326KLBXXD024
HIGH LITES ZBLED-5-R RED EXIT SIGN FIRE ALARM SIGNAGE ZBLED5R
LOT OF 19 PARKER/SWAGELOK 1/4" QUICK CONNECT STEM NIPPLE
TOSHIBA PX12-40651 IMAGING CIRCUIT BOARD CT SCANNER YWA2150 PX1240651
PANDUIT NKFP48Y NETKEY 48 PORT SNAP IN FACEPLATE PATCH PANEL
PWA 02-790871-10 CIRCUIT BOARD MODULE KMGM
SECURITY ENGINEERING 3900 ELECTROMAGNETIC DOOR LOCK 12 VDC .2 AMP
GREENGATE/COOPER GDS-6TSB-W GDS 6 Small Button Switch White
GREENGATE OAC-DT-0501-R Ceiling Occupancy Sensor w/ Daylight Sensor Dual
RAYCHEM AMC-F5 LINE SENSING THERMOSTAT 22 AMPS 125/250/480 VAC AMCF5 AK
HONEYWELL 151302-N SILENT KNIGHT IFP-50 FIRE ALARM CONTROL PANEL OWNERS MANUAL
1 PARKER MC-4 STRAIGHT BRASS 1/4" TUBE STUB PUSH-TO-CONNECT
Square D 2510MCG3V08P11 Ser. A AC Manual Starter
ZJZJ ABOVE GROD IRRIGATION GARDEN LAWN SPRINKLER SYSTEM WATER LAWN FLAW
SIEMENS LANDIS GYR 534-995 | SCU 600 FIRE ALARM CONTROL CIRCUIT BOARD | 534995
GENERAL ELECTRIC TH1LLX4 INTERLOCKING KIT METER SOCKET LOAD CENTER
Rotork AQ Control Board S28047-01
JOHNSON CONTROLS T-4002-302 | REVERSE ACTING THERMOSTAT FIRE ALARM | T400230
ALLEN BRADLEY | 1771-IJ 1771-WB | FIRE ALARM ENCODER COTER MODULE 5V I/0
FMC Ionic Flame Monitor II C-20-0-0068 Rev.2 Fire Safety Circuit Board C2000068
RELIANCE ELECTRIC 0-56313-1B ISOLATED PROCESS CIRCUIT BOARD FIRE ALARM TMB04893
SECURITY ENGINEERING 3900 ELECTROMAGNETIC DOOR LOCK 12 VDC .2 AMP PART MISSING
COMPASS CER LED EMERGENCY EXIT SIGN RED LETTERS WHITE THERMOPLASTIC HOUSING
COOPER LIGHTING FPXSURF22 2x2 FP SURFACE MOT FIRE ALARM
SQUARE D 8536SBG2S SERIES A NEMA SIZE 0 600V MAX 50/60Hz MOTOR STARTER
DM SSQUARE D 8536SBG2S SERIES A NEMA SIZE 0 600V MAX 50/60Hz MOTOR STARTER
General Electric IC693CHS391N 10 Slot Base EMI Enhanced
BRIDGEPORT 3" EMT ONLY COUPLING CONNECTOR 3INCH 3 INCH E.M.T. SET SCREW
FALK STEELFLEX COUPLING 1070T HUB FOR 70 1070T 704641 1/2 X 1/4
COMMAND ACCESS MLRK1-HAG ELECTRIFIED PANIC KIT HAGER 4500 SERIES 72730
EXTECH INSTRUMENTS PH220 PALM PH TESTER WITH ELECTRODE
PHOENIX CONTACT RS232 2744490 FL COM SERVER MODULE FIRE ALARM
POTTER PAD100-RM RELAY MODULE 3992705
SIEMENS SITOP PSU100C 6EP1331-5BA10 POWER SUPPLY
Square D 8536SCO3S Magnetic Motor Starter Nema Size 1 Ser. A 1 NC. 1 NO. 9999SX6
SF SERVICE FIRST BRD02893 MODULE TCI 111 CIRCUIT BOARD
CERBERUS PYROTRONICS FIRE ALARM CZ-30 COTING ZSUPER ZBOARD
LITHONIA LIGHTING LBR4PFW 10V LOW VOLTAGE LIGHTING CONSTRUCTION FRAME
LCN Type CUSH H Open Right Hand Arm Finish-DKBRZ
SQUARE D SIZE 00 120V COIL 1 SINGLE PHASE Combination Motor Starter
1 Misc 3/4" Coupling Connector Set Screw
SIEMENS S54319-B22-A1 FDBZ492 Duct Smoke Detector
SIEMENS 192 840 POWERS CONTROLS RETROSTAT KIT AK
B187 CODE HP 73.4F WATER SENSOR AK
STEEL CITY 521511234EWGB STEEL SQUARE WITH GRODING BUMP
STEEL CITY 521511234GB STEEL ELECTRICAL WITH GRODING BUMP
LUMONICS EC10895JC | FIRE ALARM REV A BDI TYPE 2 CARD 00005
Siemens ITE ED ED6 ED63B020MX 3 Pole 20 Amp 600v SPANISH Circuit Breaker
CH EATON WESTINGHOUSE EHD EHD3025 3 POLE 25 AMP B/S CIRCUIT BREAKER
Eaton Cutler-Hammer FD FD3020 3 Pole 20 Amp 600V B/S Circuit Breaker
INTERMATIC FF60MC AUTO SHUT TIMER 60 MINUTE SINGLE POLE
INTERMATIC FF60MC AUTO SHUT TIMER 60 MINUTE SINGLE POLE
WIEGMANN WAS300 3" OIL-TIGHT HOLE SEALS GASKETED
Edwards 1501-AQ Door Her Single Door Floor Mot 24VAC 60Hz/Dc AK
DAYTON 2YU46 SINGLE POLE THERMOSTAT AK
ASHCROFT LTAN4H00040 Explosion Proof Temperature Sensor Switch 10A 125/250VAC