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。
以下链接皆有货
ALLENBRADLEY 160BA03NPS1 SER B FRN 6.00 0.75/1HP SPEED DRIVE
ALLENBRADLEY 160BA03NPS1 SER C FRN 7.06 0.75/1HP SPEED DRIVE
ALLEN-BRADLEY 160-BA04NPS1P1 SPEED CONTROLLER SERIES C FRN 7.06 *TESTED*
ALLENBRADLEY 1746P3 SER. A SLC 500 POWER SUPPLY SLOT RACK
ALLENBRADLEY 1747L542 SER B REV 3 FRN 9 SLC500 PROCESSOR UNIT
ALLENBRADLEY 1756/PA75 POWER SUPPLY 1756A10 9 SLOT CHASSIS
ALLENBRADLEY 1756CNB SER D CONTROL NET COMMUNICATION BRIDGE
ALLENBRADLEY 1756CNB SER E CONTROL NET COMMUNICATION BRIDGE
ALLENBRADLEY 1756IB161 SERIES A DC ISOLATED INPUT MODULE
ALLENBRADLEY 1756IB161 SERIES A DC ISOLATED INPUT MODULE
Allen-Bradley 1756-L55/A Logix 5555 CPU Module + 1756-M13/A Memory Expansion
Allen-Bradley 1756-L55/A Logix 5555 CPU Module + 1756-M13/A Memory Expansion A82
ALLENBRADLEY 1756M08SE SERIES B 8 AXIS SERCOS INTERFACE
Allen-Bradley 1762-IQ8 /A MicroLogix 24VDC Input Module
Allen-Bradley 1762-L40BWA C Micrologic W/ IQ8 And OW8 Tested
ALLENBRADLEY 1764MM1RTC SER A MEMORY MODULE
Allen-Bradley 1769-IQ16F Compact I/O 16 Pt. High Speed Input Module Ser A
Allen-Bradley 1769-IT6 6-Channel Thermocouple w/mV Input Compact Logix Module
Allen-Bradley 1769-OW8I Ser B Compact I/O 8Pt Output Module FW 3.1 QTY 1
ALLENBRADLEY 1770XR HIGH ENERGY LITHIUM BATTERY 3.7V 955168
ALLEN-BRADLEY 1771-0N Rockwell Refurb Sealed
ALLENBRADLEY 1771A3B SERIES B 12SLOT I/O CHASSIS
ALLENBRADLEY 1771A3B1 B SER. B REV K01 12SLOT I/O CHASSIS
Allen-Bradley 1771-IBD Digital Input Module, 16 Inputs 10-30VDC
Allen-Bradley 1771-P2 75VA Power Supply NIB Ser# Match Genuine
Allen-Bradley 1772-LS Series A - MINI-PLC-2/05 Processor
ALLENBRADLEY 1784PCM2 CABLE
ALLENBRADLEY 1785L60B SERIES B PLC5/60 PROCESSOR MODULE
ALLENBRADLEY 1785L60B SERIES C PLC5/60 PROCESSOR MODULE
Allen-Bradley 1785-L60B/E PLC-5/60 Processor Module REV K01 96298075 A01 3.3A 5V
ALLENBRADLEY 1785LT/B PROCESSOR MODULE PLC5/15
Allen-Bradley 1785-LT3 Series A PLC-5/12 Processor
ALLENBRADLEY 179124B8 SER. B INPUT/OUTPUT I/O BLOCK MODULE
Allen-Bradley 1794-ASB Flex I/O
ALLENBRADLEY 1794ASB SER D REV A01 POWER SUPPLY RIO ADAPTER
Allen-Bradley 1794-IB16XOB16P SER A 24V DC Input/Output PLC SEALED
ALLEN-BRADLEY 1794-PS13 Series B FlexI/O Rev B01 Power Supply PN 9755701 A95
ALLENBRADLEY 190SAND2DB63C SER. A MCS COMPACT STARTER
Allen-Bradley 193-A2J3 Overload Relay 14-45Amp Tested
Allen-Bradley 193-EC2BD Ser C DeviceNet Overload Relay W/ 300-B*930 120 V Coil
Allen-Bradley 194R-FJ060P3 60 Amp Enclosed Disconnect Switch
Allen-Bradley 194R-HS4E Disconnect Switch Series A
Allen-Bradley 194R-NJ100P3 Fusible Disconnect Switch 100A 600V W/Operator Handle
ALLENBRADLEY 2094BM02 SER A KINETIX 6000 AXIS MODULE SERVO DRIVE
ALLENBRADLEY 2098DSD010 SER. A SERVO DRIVE
ALLENBRADLEY 20AD3P4A0AYNNNNN SER A POWER FLEX 70 AC DRIVE
Allen-Bradley 20BD022A0AYNAND0 15HP PowerFlex 700 AC Drive 480V W/ 20-COMM-E
Allen-Bradley 20-COMM-R PowerFlex Remote I/O Adapter FRN: V1.010 Ser A
ALLENBRADLEY 2112BBABD7FA2G2124R4079ULT988 SER. T MOTOR CONTROL UNIT
Allen-Bradley 21AD027E3AYNACC0NNNN-ND-B0-C1-P6-S1-S9-S10 PowerFlex, 170805
Allen-Bradley 2711P-T6M20D8 SER A PanelView Plus 600
ALLENBRADLEY 2760RB SERIES A REV J FLEXIBLE INTERFACE MODULE
ALLENBRADLEY 2760RB SERIES A REV L FLEXIBLE INTERFACE MODULE
ALLENBRADLEY 2760RB SERIES A REV L FLEXIBLE INTERFACE MODULE
ALLENBRADLEY 2760RB SERIES A REV N01 FLEXIBLE INTERFACE MODULE
ALLENBRADLEY 2760SFC2 SERIES A PROTOCOL CARTRIDGE KIT
ALLENBRADLEY 2803VIM1 SER. A VISION INPUT MODULE REV. C
ALLENBRADLEY 2803VIM2 SER. A VISION INPUT MODULE REV. A
ALLENBRADLEY 2803VIM2 SER. A VISION INPUT MODULE REV. B
ALLENBRADLEY 280DF12Z10BCR3 SER B ARMORSTART CONTROL MODULE
ALLENBRADLEY 280DFN25C SERIES B ARMORSTART BASE UNIT
ALLENBRADLEY 280DFN25C SERIES C ARMORSTART BASE UNIT NNB
Allen-Bradley 30mm Pilot Light Red 120V 800T-PT16R Series T !!
ALLEN-BRADLEY 40146-013-60
ALLENBRADLEY 403822265 REV C SNUBBER PCB CIRCUIT BOARD
Allen-Bradley 42GRR-9002-QD Photoswitch, Trans Beam Receiver
Allen-Bradley 42KB-U2LPSN-A5 Retroreflective Rectangular Sensor
Allen-Bradley 440E-A13082 Guard Master LRTS 20M (65.6 ft) Installation Kit
Allen-Bradley 440E-L13043 Lifeline 4 Series C 1/2" NPT Cable Pull Switch 1
ALLENBRADLEY 440NN15027 SER A SAFTEY INTERLOCK KIT MISSING BOX
Allen-Bradley 440R-ZBE820AZ1 Safety Relay
Allen-Bradley 440R-ZBR520AZ1 Guardmaster Safety Relay
ALLENBRADLEY 44O4P23073 SAFTEY RELAY
ALLEN-BRADLEY 4-SLOT I/O CHASSIS ASSEMBLY 1771-A1B/B W/ETHERNET CARD PLC-5/80E 1
ALLEN-BRADLEY 500LP-FOD93 300A AC CONTACTOR
ALLENBRADLEY 505A0D SER. A NEMA 1 MOTOR STARTER
ALLENBRADLEY 505B0D SER. A NEMA 1 REVERSING STARTER
ALLENBRADLEY 505B0D SER. C NEMA 1 REVERSING STARTER
Allen-Bradley 505-COD-23 Size 2 Reversing Starter W/ 120v Coil Refurb LRG QTY
Allen-Bradley 509-BOD-XXX Size 1 Starter w/ 592-A2DA Ovld Relay 120V Coil
Allen-Bradley 509-BOD-XXX Size 1 Starter w/ 592-A2EA Ovld Relay 120V Coil
Allen-Bradley 509-BOD-XXX Size 1 Starter w/ 592-A2FA Ovld Relay, 110/120V Coil
Allen-Bradley 509-BOD-XXX Size 1 Starter w/ 592-A2HA Ovld Relay, 110/120V Coil
ALLENBRADLEY 512AAB16P24R SER D SIZE 1 COMBINATION MOTOR CONTROLLER
ALLENBRADLEY 512AAB16P24R SER D SIZE 1 COMBINATION MOTOR CONTROLLER
ALLEN-BRADLEY 592-TPD400 TRANSFORMER WITH 592-JOV16 RELAY ( TESTED)
ALLEN-BRADLEY 609-AAW MANUAL MOTOR STARTER SIZE 0
ALLEN-BRADLEY 6176M-19PN VERSAVIEW 1950M 19" TOUCH SCREEN HMI MONITOR Sealed
ALLEN-BRADLEY 6176M-19PN VERSAVIEW 1950M 19" TOUCH SCREEN HMI MONITOR
ALLENBRADLEY 634619A 90 CIRCUIT BOARD
ALLENBRADLEY 634619A90 CIRCUIT BOARD
ALLENBRADLEY 700DCN400Z2 SERIES C AC CONTROL RELAY NOS
Allen-Bradley 700-NM400A1 Industrial Controls
ALLENBRADLEY 700NM420A1 SERIES E TYPE NM AC LATCH RELAY
Allen-Bradley 700S-CF620JC Safety Industrial Relay Guard master 24V Coil
Allen-Bradley 700-ZBR100AZ1 Safety Relay
ALLENBRADLEY 705DOD SIZE 3 SER K REVERSING STARTER
ALLENBRADLEY 8000PCB 5.0A FUSE NORM BLO POWER SUPPLY
Allen-Bradley 800T-QT24A Orange Illum. 6 wire Push Button
Allen-Bradley 800T-U34 Potentiometer Selector Switch Ser P 300Vac 2W NIB
ALLEN-BRADLEY 800T-U34 SER.Q POTENTIOMETER 15K OHMS