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
DOOSAN VISION DS-RH20TA-50O AC SERVO MOTOR DIG-155 200V 3PH 12.3A 2.0KW 2000RPM
DOOSAN VISION DVSD-TT-14B-08 AC SERVO DRIVER AC200~230V 3PHASE 1.5/2.0KW
DOOSAN VISION DVSD-TT-14B-08 AC SERVO DRIVER AC200~230V 3PHASE 1.5/2.0KW, ITEM A
DORIAN TOOL MCLNR 20-4D INDEXABLE LATHE TURNING TOOL HOLDER 50132 6"X1.25"X1.25"
DORMA 8616-SPA-COV-SNB1-689 8616 Series Door Surface Closer
Dorma 8956 Closer, Dorma 8956 CB 689 FMC Tandem SN1
DORMA EXIT DEVICE PANIC BAR 5101BB 418 439 RHR 605 LOWRISE
DORNER SPINDLE KIT DRIVE 2200 2" 22T-02
Do-Soric Fiber optic Cable WRB 130 S-M4
Double A Bickers Hydraulic Control BQ063MSJ310B1LK Set @ 300 Psi Max Psi 3000 F1
DOuble A BNNNC-01-2M-L-10A1 Directional Valve
Double A BQ 06 HN12 22AI Hydraulic Valve Max PSI 3000
Double A JAP-06-10B2 CircuitStak Hydraulic Valve
DOUBLE A NNNBC33M10BC HYDRAULIC PRESSURE REDUCING VALVE CONDITION F1
Double A PQF-01-FF-10F1 PQM-06-C-10F1 Pilot Valve w/ Base Mountarr
Double A QF-3-C-10B1-LK 1000PSI Solenoid Valve
Double A QF-5-F2-10A3 4500PSI Solenoid Valve
Double A QF-5-FFX-10A2-LK 70 Bar Hydraulic Valve
Double A QJ-01-C-10F2 Pnumatic Air Valve
Double A QJ-3-C-10A2 Solenoid Valve
Double A QM-5-C-10A2-TSP 1000PSI Valve
Double A Solenoid Valve Hydraulic QF-3-FFX-10D1-TSPL 5000 Psi 120V
DOUBLE A SOLENOID VALVE QF-02-C-10B1 SOLENOID NO. 85-30400-32
Double A YP-01-10A3 CircuitStak Hydraulic Valve arr.
DOUGLAS AIRCRAFT INC TUBE BENDER DIE K652-6109-10-0300-GT 9045
Douglas Surepower DBS1B12-485 24V 79A Battery Charger
Dove Systems DM-1210A Wall Dimmer
DPharp TransmitterEJ120 Style S2 24V DC 4-20mA DC 90 Day
DPS 440000651 740001651 REV 01 PCB BOARD, 125844
DPSS 3530 UV Marking Laser System Tool, Class I Benchtop, Scribing, 3510, 101023
DPSS 3530 UV Marking Laser System Tool, Class I Benchtop, Scribing, 101006
DR SH 800-05513-80 L962780106 Clutch Gear
Dr. Johannes Heidenhain 213 116 45 encoder ROD 250 18000 | 213116-45
DR. JOHANNES HEIDENHAIN ENCODER ROD 420.013 500 K9, 245 810 02, CHARMILLES EDM
DR. JOHANNES HEIDENHAIN ENCODER ROD 420.013, 245 810 02, CHARMILLES EDM ROBOFIL
DR. JOHANNES HEIDENHAIN ROD 320 500 H5 ID.NR. 209 698 03 ROTARY ENCODERRR
Dr.Schenk 3-550-450 DC24 SolarInspect for Thin Film Inspection
Dräger Board 8306421 2.1 | ARHF-0254
DRAGER GAS DETECTOR HEAD 4543445 16-30VDC 90MA
Dräger Regard Interface Card CUI 0000 // P/No: 8320581
Drain-All 1700 Compressed Pnumatic Air Drain Valve
DRC DYNAMICS RESEARCH ENCODER 29L-30-B13-1000P S/N 44371,
Dresser Rand Thermoflx Disc VBW815 015-001
Dresser Rand Thermoflx Disc VBX815 013-003
Dressler RF Generator, Cesar 136, 287-230 V, 6.3 A, 600 W, 13.56 MHz, 416473
DREXELBROOK ENCLOSURE EXP PROOF 260-2-85 W/406-6000-001 LEVEL CONTROLRR
DREXELBROOK LEVEL SENSING ASSEMBLY TRANSMITTER 260-2-162 W/260-2-130RRA
Drill Unit DUSDW2410STP 3.93IN Stroke 3500RPM 3PH .27HP 230-460V Induction Motor
DRISTEEM DRI STEEM TANK
Dristeem model XT-10 277v 1 phase 2 yr warrenty
DROPSA LUBRICATOR TANK TYP M56B4 PUMP ASSEMBLY 3902074
DROPSA LUBRICATOR TANK TYP M56B4 PUMP ASSEMBLY 3902074 FR BRIDGEPORT VMC 800, A
DS41-10 DS4110 Datalogic barcode scanner
measuring technology motor controller multisystem II-TG-19O000202 K1: mA / K2: mA
® Computer 96M1670-Z510 Hat Rails PC
DTC CHUCKING REAMER 1-1/8" DIA, 8 FLUTE, 11" OAL, MADE IN ENGLAND
DTC CHUCKING REAMER 1-1/8" DIA, 8 FLUTE, 11" OAL, MADE IN ENGLAND, ITEM A
D-TECH VFD ACH3C730NI W/ABB DRIVE ACH501-030-4-00P2 30HP 36A 3PH 50/60HZR
D-TECH VFD ACH-3CT07NI 8.1A 3PH W/IMPERVITRAN VOLTAGE TRANSFORMER B050BTZ13JK W/
DUAL LITE N4XER1-EP NEMA 4X SERIES EXIT SIGN EMERGENCY LIGHT 277V WHITE
Dual Wafer Edge Grip Assy w/ Flip, 955830, 171490
Dublin Union 1 1/2"- UNF RH ROTOR 357-000-019
Ductowire PB-1B Mechanical Interlock 1 Speed
DUFF NORTON M2555-6 SCREW ACTUATOR M25556
Duff Norton Rotary Unions Steam Condensate 730859 1” NPT
Duff-Norton Acuator MPB7000-145 3” Stroke 115V 500LB
Dukane 110-2185B Nurse Call Power Supply Station Box
Dukane 4A2495 Push Button Call Station
Dukane Communication 24 VDC, 3.2 A POWER SUPPLY
Dukane J1399-3-GANG VP Patient Station w/ Call-In Switch
Dukane MCS350/64-25-1 3A 60HZ Intercom System
DUKANE TELCO STATION PRO CARE 110-3628B 6000 NURSE CALL 90DAY
DUKANE VP PATIENT STATION J1399-3-GANG W/CALL-IN SWITCH
DUNDICK 3.5005 XX A83 RING GAUGE GAGE W/ WOOD BOX
DUNGS 225256 Adjustable Bypass
Dungs 226459 FRG 707/6 Proportionator Zero Governor NPT 3/4" Pressure Regulator
DUNGS AA-A2-6-2 AIR PRESSURE SWITCH .16-1.2WC 266932
Dungs AA-A2-6-5 Differential Air Pressure Switch 2-20" 7psi Max 266936
Dungs GMH-A4-4-8 Gas Pressure Switch -
DUNGS PRESSURE SWITCH GML-A4-4-4 1-20 IN W.C
Dunkermotoren DC Servo Motor GR42X40 W/Reduction Head PLG42S 50:1
Dunkermotoren GR 63×55 30V DC Motor
Dunkermotoren Servo Motor + Gearbox SG 80 | 88842 03280 | W:10mm | DR62.0X80-2
Duotect 5 Amp H2S1 1500PSI Range: 3-40 5-75 H2 Pressure Switch
DURAG D-LE 603 UA-MP
Dura-Line Bull-Line 3000 ft x 1/2" 1250 lbs Strength TA Detectable P12 20000052
Durant 5-SP-7-3-S-AC 10:1 Digital Counter Instruments
Durant 6 Digit Back Mount Clockwise Counter 6-HF-41-R-AC
Durant ES-9513 Ratio 10:1 Rotary Contactor Old Stock
Durant ES-9513-RS Ratio 10:1 Rotary Contactor Old Stock
DURANT RATE METER 47100-400 120V 60HZ 3 INPUT 90DAY
Durant Shaft Encoder Model 48370 120 Pulses Per Rev. - Eaton
Durashield Blade Kit 48” 56303472 NOS
Dürkopp conveyor technology 754M 231106 | 11264625 | COAX/FIBER converter
Dürkopp conveyor technology 754W 301000 transponder | 11276792 | digital part
Dürkopp conveyor technology 754W 301002 | 11367287 | transponder reading head
DURO DYNE FLEXIBLE DUCT CONNECTOR JRN 10028 1 3/4X3X1 3/4 NEOPRENE 90DAY WAR
DVT IDIA6 CONNECTOR PINOUT SMART LIGHT
DWYER 1638-1 ITEM 011787-B8-2 S89
Dwyer 1638-2 Pressure Switch 10psi Max 250/480v-
DWYER 1910-1 PRESSURE SWITCH SERIES 1900.
Dwyer 1950 Series W180G Differential Pressure Switcharrnaty
DWYER 195052F DIFFERNTIAL PRESSURE SWITCH
DWYER 2050 Pressure Gauge,0 to 50 In H2O