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
Amot Control 8060A12-AA Temperature Sensor
12-Pluse Rectifier Control PCB HS3 94V-0 3CD-2 CD150305
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Cisco 85-5771-03 Rev A0 / 53-2316-03 Rev F0
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1560-0100 Plug Valve 3Way 150 Psi - F/ HPU BOP Controls Triplex Pump
CAT 5M-2853 Fuel Injector Body FOR CATERPILLER D02M12Y10P478 MADE IN USA
Framo Engineering 200680 Pressure Valve (Safety)
TE5015 Kill Bracket For 6032 Seatrax Crane - Engine and Linkage Assembly
ADALET XVHPPM EXPLOSION PROOF PUSH BUTTON with CUTLER-HAMMER 10250T1 CONTACT BLO
YM Cypress C-12600MA 54 Mechanical Seal
Siemens 6GK1 502-3CB10 Simatic Net Profibus OLM/G12 / 6GK15023CB10
KPCB 357122H02 - Chopper Board - UPS - 375405G02 Rev 0.0 - 14 Schrack Relays
Wartsila Wear Ring 89009227
Adalet Pilot Light Push Button - Long and Panel Mount XLPR-G 120V
Ab 802X-A7 Nema/eemas A600 Limit switch
SKF BB1-1632 Ball Bearing
BARTEC Ex Closure Typ GB-160/10 Junction -ATEX Baseefa07Atex0140X 7W 550V 21A
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Rebuilt Kit Macerator Pump 22250-2 Omnipure 5556 - Severn Trent De Nora LLC
Cabletronix CTA-35/1000PR CATV Distribution Amplifier
Sound Powered TelephSPT Ltd Generator assembly 10666 'B' Socket
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Ashcroft Duratemp 20-240f Gas Actuated Thermometer
Convel Din Rail mounted PSU Type 42024A/110 RS 597-138 Power Supply
Rosemount Pressure Transmitter 3051CA2A22A1JE8M6Q4J1
Unitor 0724108 MediReg II Medical Oxygen Regulator 200 bar
Ingersoll-Rand 30420442 - Gasket Set
GE Fanuc Genius IC660EBD120K Electric Module Hi-Speed Counter
AB Eutectic Overlord Realy 592-EUTD PN 66621
OMRON MKF-P FLICKER RELAY 24VDC TIME 0.5S - 2PCS LOT
SQUARE D CLASS:9012 TYPE:GAW24-S112 SERIES:C PRESSURE SWITCH
Ohmite Power Power Rib Resistor PFE5KR50 .50 Ohms
GE Fanuc Genius IC660EBD024U Electric Module 12-24VDC 32 SRC W/ IC660TB024K
Versa TSG-2421-H-S-XX-A480 Solenoid Valve
Emerson PS1-A5A Pressure Switch PCN 4350500
Westinghouse NP502A054H01 Rotary switch -
HAMWORTHY HCY31081 CONNECTING ROD 2ND, 3RD 4TH STAGE 50067
Safety Valve - BRZ Body - 704 for Naniwa ALG-65 Horizontal Gear Rotary Pump -2pc
GE Fanuc Genius IC660EBD024T Electric Module 12-24VDC 32SRC W/ IC660TBD024K
GE Silicon Rectifier Diode 1N3270R
Pheonix Digital - OPT COMM MOD Model: OCM-GEN-13-P-D-ST-14V-SPC1A
Square D 9070T50D1 Control Transformer En60-742 50/60Hz, 0.05Kva
Square D 9070T50D1 Control Transformer En60-742 50/60Hz, 0.05Kva
Hobart 289782-1 Sleeve
Meiko 0501138 Impeller For DV 80 Wash Pump - 2pc lot
SEIKO ELECTRIC TBRSF1 607 PR SPEED CONTROL SWITCH
BARKSDALE D2T-M80SS-LV Preaaure Switch
SKF Bearing H313 Withdrawal Sleeve Lock Washers
SKF Bearing H313 Withdrawal Sleeve Lock Washers
Yuken DT-02-B-2290 Relief Valve - 1/4" NPT Knob Operated
Yuken Directional Valve DMG-01-3D2-10 - VK312078-9 Yuken Kogyo Japan
APPLETON EDSK1J M PUSH BUTTON SWITCH - PILOT LIGHT LAMP NO. 656 - 2PC LOT
HB Brasil 967.222.11 transdutor de temperature tnt
Siemens PCB S30810-02918-Z000-01 / A30810-X2918-Z-1-7411 TMGL4R
Kubler T8.5000.1224.5000 Encoder Ident No 181729 5-30Vdc
Valve Actuator 1210 Position Indicator Assy F/1AE9 2AE9 Margon Precon
MAX-AIR UT11 SR2 F04 REV A 2 WAY VALVE BALL PNEUMATIC
ITT 98087-500P0070 Pressure Switch Dband 350 Psi Proof 7500 Psid
Aplisens Pressure Transducer 0...250Kpa 4...20mA 10.5...36V
Abb Sace 179033 R113 Thermomagnetic Release Kit
BURKERT SOLENOID VALVE 0290 A 12,0 EPDM MS
Damcos G121-1200 ILL push Button F162S9-24R-11R Bin 2256 Maruyasa C161-11
Siemens 7PU5120-6CJ20 Relay
Abb Sace UXAB 179040 R400 / UXAB179040R400
Facts Engineering FA-24PS Switching Power Supply Module P9148-C
Facts Engineering FA-24PS Switching Power Supply Module P9148-C
Crouzet HNW 84 870 700 Relay 8B-2014-W23 00279 A1/A2: 24…240V AC/DC~ 50/60 Hz
Ring, Split Ring, Mux Connector TEL - 1375262-501 - 2 pc Set
Bimba 311-D Pneumatic Air Cylinder
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