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。
MICRO-SWITCH 10A 120/240/480V PRECISION LIMIT SWITCH 204LS1
LOT OF (5) MARCONI MARSH OPTIONAL MOTS FOR FLEX STAND BRACKET
SNFA BUSHING FOR S1 BALLSCREW BSDU-220 DD230
TELEDYNE HASTINGS VACUUM GAUGE VT-6
GARLOCK KLOZURE 3.625" X 4.75" X .5" OIL SEAL 53X2420 21086-2420
ARO 1/4" NEEDLE VALVE 104104-N01
VIKING 1-1/8" SEAL 1-1/8" ID
DODGE 30:1 RATIO TIGEAR 2 GEAR REDUCER 176Q30L56
KING-GAGE ENGINEERING POST ASSEMBLY 7859-3
NSK DEEP GROOVE BALL BEARING 3309JC3
TOL-O-MATIC REPAIR KIT RKBC2#87750
ATLAS COPCO ZR4 OIL PUMP GASKET KIT 2910-0179-00 61.400.130
GOULD SHAWMUT AMP-TRAP 400E AMP POWER FUSE A055B2DAR0-400E
KEB LAIPPLE 230/400V 12/7A 3KW MOTOR MA90L2
PARKER BRASS 1/4" TUBE X 1/2" TUBE END REDUCER 8-4TRBZ-B
TELEMECANIQUE 4-PIN FEMALE 2-METER CONNECTOR CORD SET XSZCS141
STEINMEYER BALL-SCREW 124664
FISHER MODULE ASSEMBLY PWB 03311-0505-9
SKF (SNW 22X315/16) SLEEVE ADAPTER H-322
HONEYWELL 3-POSITION CENTER RETURN SELECTOR SWITCH 910PDD031
EMPIRE 1METER I/O HOUSING WASH ROBOT WIRING CABLE EWM-1246-M1
SWAGELOK 1/4" QUICK CONNECT FITTING QT2-4-316
TELEMECANIQUE 10A 240V SAFETY INTERLOCK XCSPA791
SQUARE D TIME DELAY RELAY SER.C 9050-AG1D
SKF ANGULAR CONTACT BALL BEARING 7206 BECBP
1 SKF ANGULAR CONTACT BALL BEARING 7206 BECBP
ADSEN 12-24V 1/8" VAC 0-101.3KPA PRESSURE SWITCH AP40V-04-F2-QD
ESTIC HANDY 1000 NUTRNER HAND TOOL CONTROLLER ENRH-HT10-201
REXROTH TASK MASTER CYLINDER 200PSI TM-813000-00014
RADISYS ENCODER BOARD EXM-27 61-0237-04
IFM/EFECTOR 36V INDUCTIVE SENSOR IIB3015BBPKG/M/US-104-DPS-IIS204
EATON 7A 480Y/277V 3-POLE CIRCUIT BREAKER WMZT3C07
SKF BEARING NU-2210-J
LOT OF (5) BRYANT 660W-600V LAMP HER SOCKET
SKF BALL BEARING FLANGE IT FY-20-TF
LMI LE-75S HEAD ASSEMBLY 25831
KKLE VALVE 1/2" PVCN SAFETY RELIEF VALVE 6010DCM01-KM-0060
LOT OF (5) SSP 3/8" TUBE X 1/4" MNPT SS BULKHEAD CONNECTORS ISSD68MC4
SCHNEIDER 5A 240V 1-P C60 MINIATURE CIRCUIT BREAKER 60206
GATES SUPER HC V80 BELT 5VX1250 / 9414-1250
ABB ACCURAY ION CHAMBER 048187-005 EAXLTP 386739010
EATON SM PHOTOSWITCH SENSOR E65-SMTS15-HA
WARNER ELECTRIC CLUTCH FIELD ROTOR SF/SFC-500
ABB SWITCHGEAR SOLID STATE POWER SHIELD TRIP IT 609904-T501-N 609904T501N
WARNER PHOTO SCANNER RELAY 7150-101-016
YG1 HSSCO 1/2" X 1/2" X 1-1/4" X 3-1/4" 4F END MILL E2039032
BANNER ENGINEERING IVU SENSOR 4.3MM LENS IVUTGPR04 10928
LOT OF (8) MILWAUKEE GRINDING WHEELS 49-93-6230 30-B026
GATES TIMING SPROCKET P32-8MGT-20
STAUBLI ENCODER BRAKE ASSEMBLY D23169600 D-83301 392 278-54
FUJI 28-40A MANUAL MOTOR STARTER BM3VHB-040
MAZAK ELBOW FITTING H16BB000250
BRANDED TEMPERATURE PROBE 10327A1065
FANUC AC SERVO MOTOR A06B-0064-B203 W/ P321SPR0100MT GEAR
RELIANCE ELECTRIC 4 BOLT FLANGE MOT BEARING 3/4" 124100
GURARNTEED COMTROL 70035 RAPISTAN 16-PORT I/O PCB F002501027A / HOXX5016AP
INGERSOLL RAND ARO ECONOMAIR PNEUMATIC AIR CYLINDER 2318-1489-040
SMC PNEUMATIC DOUBLE ACTING CYLINDER CD85WE12-50-A
AMPCO PUMPS REPAIR KIT 130896 / GS02600651
MIDLAND 3/4" HOSE BARB X 3/4" NPT MALE ADAPTERS 3
MOTORTRONICS SOFT STARER VMX-18-BP
MAC 24V SOLENOID VALVE 45A-SA1-DDAA-1MA
MARSH/BELLOFRAM 2" 0-100 PSI 1/4" PRESSURE GAUGE J2648
MICRO-SWITCH 15A 480V LIMIT SWITCH BZ-2RW8252
DODGE 1060T GRID 006279
MAC 24V SOLENOID VALVE PME-591DAAD
SCHNEIDER 2-POSITION SPRING RETURN SELECTOR SWITCH ZB4-BJ4
HYDRAFORCE 115V COIL SOLENOID CARTRIDGE VALVE SV08-20S-6T-N-115AP
HUMPHREY BRASS LOW ACTUATION CONVEYOR EXHAUST VALVE N740A
ALLEN-BRADLEY SER.B 120V COIL CONTACTOR 100-C60*00 100-F 100-FSC280
MITSUBISHI CIRCUIT BOARD FR-A5AX
WILKERSON 1/4" NPT METAL BOWL PNEUMATIC FILTER F08-02-SL00
COIL TECHNOLOGY ULTRASONIC RANGE CARD CB-5101R
MARSH BELLOFRAM SUPER CYLINDER BEARING REPAIR KIT 970-133-000
ENERPAC 16-TON 10,000 PSI DOUBLE ACTING CYLINDER BRD166
OKUMA OPERATOR PANEL E5409-770-002-3 W/ PULSE E3051-977-004
SMC 10MM STROKE SLIDE CYLINDER MXQ12-10
RELIANCE ELECTRIC ABB PC GATE COUPLING CARD 0-51378-19
WHITTETHIGGINS .664-32 X 1.125" OD BEARHUG LOCKNUTS BH03
POWEROHM BRAKE RESISTOR 04D7908G11 HUBBELL WESTINGHOUSE CRANE
IFM/EFECTOR 30V RETRO REFLECTIVE SENSOR OGP-HPKG/US/90°-OG5125
BROOKS 0.5-5 SCFM FLOW METER 2530A4A67BVBN
ASHCROFT 2-1/2" 0-5000 PSI PRESSURE GAUGE 25-1009-SWL-02L-5000
OMRON 12V COLOR CAMERA STC-620PWT *BENT VIDEO OUTPUT*
ALLEN-BRADLEY OPTICAL INCREMENTAL ENCODER SER.A 845T-DN31ACH-C
VIDEOJET REV.BB THROUGH BEAM FIBER PRODUCT DETECTOR KIT 375085-05
GEMCO ADJUSTABLE COUPLING 3001-101S
MICRO-SWITCH 20A 480V LIMIT SWITCH BA-2RV191-A2
GE CIRCUIT BOARD F31X133PRUAGG1
OF (6) NIB SYLVANIA 320W METAL HALIDE BULBS MCP320/PS/BU-ONLY/840/BT37
DIAMOND SAPPHIRE 10' ROLLER CHAIN 10B-2X10FT RSC-10B-2R-10FT
KEB AUTOMATION CLUTCH BRAKE COMBI 0810370-433U
ABB CIRCUIT BOARD 49Q03110AU CAD047
COLUMBIA 3000PSI P A B PORTS SOLENOID VALVE 3500082
MAC 120V 4-WAY SOLENOID VALVE 6211C-000-PM-111DA
MCGILL PRECISION NEEDLE BEARING GR-10-N
BULLARD SIDE HEAD GEAR ASSEMBLY 47523-2 / 31842
NATIONAL 3/4" FEMALE ROD END HF10
.5HP 1725RPM 575V GENERAL PURPOSE MOTOR CM3538-5
BANNER SAFETY SWITCH MAGNETIC ACTUATOR SI-MAG1MM
RELIANCE ELECTRIC CIRCUIT BOARD 27319-E XM-3
FURNAS REVERSING CONTACTOR 44BE40AG
ROSEMOT CONDUCTIVITY SENSOR CONSTANT 0.1/CM MODEL# 412
DYNACORP 90V FIELD MAGNET 304334
BLACK PLASTIC REGISTER 3343140003
VOGT 3/4" GATE VALVE B-40404R19
DIAGRAPH INK JET SYSTEM 5760805P-BS
BTG INSTRUMENTS PULP SAMPLER PPS-1000
HUB-CITY SPIRALK BEVEL GEAR REDUCER 0220-00813
SIEMENS SIMATIC S7 PROFIBUS ADAPTER MODULE 6ES7-151-1AA05-0AB0
FACTORY ALLEN-BRADLEY 115V POWERFLEX OPTION MODULE 20-750-2262D-2R
HONEYWELL MICRO-SWITCH LIMIT SWITCH PLGER HEAD 9PA32
LOT OF 7 SWAGELOK 1/4" TUBE X 1/4" NPT MALE ELBOWS SS-400-2-4
KKLE 1-1/2" 100PSIG SAFETY RELIEF VALVE 6010HGM01-AM
TB WOODS SIZE 7J SUREFLEX COUPLING WITH 7S X 1-1/2 COUPLING HUB
YAMADA DIAPHRAGM PUMP NDP-5FPT
TRI-TRONICS SMARTEYE 12-24V RECEIVER SD
CHICAGO RAWHIDE 5-1/2" X 6-3/4" X 1/2" OIL SEAL CRWH1 54972
SMC MOTING HARDWARE FOR TRNION NCGT040
EDWARDS ADAPTALIGHT MAGENTA STACKABLE FLASHING LIGHT 101FINHM-N5
SIEMENS BLUE FLAT MOMENTARY PUSH BUTTON
BECK LEFT HAND SWITCH ASSEMBLY 20-3200-04
BENTLY NEVADA 7200 5 8 MM PROXIMITY SENSOR 18745-03
ALLEN-BRADLEY SERVO DRIVE 1391-DES22-DI-AQB
SIEMENS 34V INDUCTIVE PROXIMITY SWITCH 3RG40720CD00
FACTS INC POWER SUPPLY BOARD W/ DIGITAL DISPLAY A-A90.32-3
TELEMECANIQUE 24V ULTRASONIC PROXIMITY SENSOR VM1PNC94Q
MILLTRONICS THE PROBE ULTRASONIC LEVEL MONITOR 86111010
ASCO 120V 3-WAY 1/4" 10.1 WATTS SOLENOID VALVE HT8320G172MS
EATON CUTLER-HAMMER 2-BUTTON START/STOP STATION 10250T3528
ABB CHART RECORDER DISPLAY C1900/0273/0270B
BANNER 18V PHOTOELECTRIC AMPLIFIER LOGIC MODULE B4-2-1500B