福建中立恒自动化设备有限公司
1.输入/输出单元
输入/输出单元通常也称I/O单元或I/O模块,是PLC与工业生产现场之间的连接部件。
PLC通过输入接口可以检测被控对象的各种数据,以这些数据作为PLC对被控制对象进行控制的依据;同时PLC又通过输出接口将处理结果送给被控制对象,以实现控制目的。
由于外部输入设备和输出设备所需的信号电平是多种多样的,而PLC内部CPU的处理的信息只能是标准电平,所以I/O接口要实现这种转换。
I/O接口一般都具有光电隔离和滤波功能,以提高PLC的抗干扰能力。另外,I/O接口上通常还有状态指示,工作状况直观,便于维护。
PLC提供了多种操作电平和驱动能力的I/O接口,有各种各样功能的I/O接口供用户选用。I/O接口的主要类型有:数字量(开关量)输入、数字量(开关量)输出、模拟量输入、模拟量输出等。
常用的开关量输入接口按其使用的电源不同有三种类型:直流输入接口、交流输入接口和交/直流输入接口。
常用的开关量输出接口按输出开关器件不同有三种类型:是继电器输出、晶体管输出和双向晶闸管输出。
继电器输出接口可驱动交流或直流负载,但其响应时间长,动作频率低;而晶体管输出和双向晶闸管输出接口的响应速度快,动作频率高,但前者只能用于驱动直流负载,后者只能用于交流负载。
PLC的I/O接口所能接受的输入信号个数和输出信号个数称为PLC输入/输出(I/O)点数。I/O点数是选择PLC的重要依据之一。当系统的I/O点数不够时,可通过PLC的I/O扩展接口对系统进行扩展。
2.通信接口
PLC配有各种通信接口,这些通信接口一般都带有通信处理器。
PLC通过这些通信接口可与监视器、打印机、其它PLC、计算机等设备实现通信。
PLC与打印机连接,可将过程信息、系统参数等输出打印;与监视器连接,可将控制过程图像显示出来;与其它PLC连接,可组成多机系统或连成网络,实现更大规模控制。
与计算机连接,可组成多级分布式控制系统,实现控制与管理相结合。远程I/O系统也必须配备相应的通信接口模块。
3.智能接口模块
智能接口模块是一独立的计算机系统,它有自己的CPU、系统程序、存储器以及与PLC系统总线相连的接口。
它作为PLC系统的一个模块,通过总线与PLC相连,进行数据交换,并在PLC的协调管理下独立地进行工作。
PLC的智能接口模块种类很多,如:高速计数模块、闭环控制模块、运动控制模块、中断控制模块等。
以下链接皆有货
Dana 817246 Knuckle Lh
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Epec E30B2024-20 Electronic Main Plc 250
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Dana 126721 Differential Case Kit Flange, Half Case
Agco AG309724 Drive
Komatsu 21N-06-32262 Wiring Harness
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Hino 82121E3170 Wire Engine
Aftermarket AT304412 Wheel Assembly
Mcneilus A5634 Pump 37.5 Gpm Dir Mtd Ccw
2254658 Valve Gp for Caterpillar
Kubota 7J041-95102 Parts La402 S Fl
Aftermarket AT321430 Shaft
Case 397407A1 Kit
Horton 99A9750 Engine Cooling Fan Clutch
Mcneilus 0128322 Camera B/W Shut/Htr Intech
Komatsu 707-88-38470 Cover
Peterbilt 798162RMAN Clutch Reman Dma 2 Speed Paccar Px8
Case 75249883 Cable Electric
Wacker Neuson Const Eq. 1000186528 Pendx 1000276972 Cylinder
Case 86632258 Plate
Komatsu 708-8H-13432 Cam
Koehring 359D6504 Shaft
68270672ZH Multi Media Radio for Chrysler
Liebherr American 94017466 Pin
Fuller K3716RX Transmission Control Module , Exchange
Hyster S00976310071 Tube, Exhaust
Rex Roth MHRB32NG11/D608GV11 Valve
Construction Equip. 31EE-60010 Bucket Cylinder for Hyundai
Liebherr American 10665266 Line Filter
Martec 89MX262256 Lift Gate Pump Lift Gate Pump
Chelsea 210XMMFP-X2SD Power Take (Pto) Assembly 210 Series, Power Shift
Ford GA8Z7404320AB Panel Instrument
Agco 72201938 Brake Kit
Hyster 6990483 Housing Rh
20R7296 Compressor for Caterpillar
Paccar 4261D05A023 *
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5374290 Filter for Caterpillar
6D7476 Shaft for Caterpillar
Euclid E4049105 Tube Asy
Case 85824222 Valve Control
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Case ND126670 Plate
Tadano America Corporation 32951140 Pin
Tadano America Corporation 94732951140 Pin
Hydraforce Inc HF44850-08 Valvelis;285 K
Generac Power Systems 062245A256 Camshaft
Horton 99A7202 Engine Cooling Fan Clutch
Terex 26669016 Linear Position Sensor
Chelsea 272GGAJX-A3RK Power Take (Pto) Assembly 272 Series, Power Shift
Schaeff 5018001106 Blade
Hyster 4021734 Bearing
Hydreco P2AP2210/1606A289 Pump
Aftermarket F125161 Switch, Foot Pedal
Vermeer 90048001 Valve Relief
4757867 Tube Weldmen for Caterpillar
Schaeff 6151718102 Adapter Kpl.
Daemo B23490070 Assembly Control Valve Bt4000*
Aftermarket R118068 Extension
Hyster 1499350 Harness Cab
Mitsubishi 0913945 End
Fox 88306178 Kit: 05 On Tacoma W/ Uca F for Toyota
Danfoss 156B8412 Valve Section
Hyster S01366420025 Wire Harness
Peterbilt 79A8121RMAN Clutch Fan
Case 79114388 Tie Rod
Komatsu 419-62-23580 Tube
Case 84188762 Dia Kit Harvester
Peterbilt HDC010093SK Rad Assy
Chelsea 281GBFJP-B5XD Pto Assy
Terex 15504533 Spindle
Komatsu 1261115H1 Gland
Akg Of America 0266.002.2000 Brake Cooler
6KL77LXHAA Multi Media Radio for Chrysler
68258383ZI Multi Media Radio for Chrysler
Doosan 4474-353-056 Output Shaft
Vermeer 506250519 Monitor Elect Automatic Re
Case 277127A2 Harness
Hyster 2013814 Piston Rod
Agco AG524260 Kit
Groeneveld Group F600768 Grease Pump Asm Pneumatic
Case 87732777 Housing Bearing
Aftermarket 0251302053 Pinion Shaft
Euclid E12621905 Wire Harness
Hella 012865451 Headlight
Kobelco YN22E00751F2 Controller
Peterbilt 07-06649 Tie Rod Radiator
Mecc Alte T16F-130_0260671K Alternator 6k Va 230/400 V 50 Hz 3 Ph
Mecc Alte T16F-130_0260667K Alternator 6k Va 230/400 V 50 Hz 3 Ph
Komatsu 56667640 ze In Bush
641334 Exhaust Gas Recirculation (Egr) Cooler Detroit Diesel Series 60 for PAI
Zf 4657-371-017 Shaft
Leece Neville 4740JB Alternator
Liebherr American 9104576 Piston Rod
Case 393189A3 Post
Mitsubishi 0394692 Lever As Axle
International 4029315C95 Light,Head , Led Composite, Lh
Komatsu 79200873 Harness
Dayton Parts TRA-3519 Leaf Spring
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