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

Aftermarket ER196639 Hydraulic Pump

Kobelco PH91V00002F1 Compressor

Wai VRC2010 Tester Vr

Case 87686595 Dia Kit Tractor

Case 84312162 Gear Bevel

Timber Jack Replacement 843159200 Hub

Case 765101 Shaft

Komatsu 76855773 Kit Seal

15-13306-010 Insert .25 Lx8.75 X115 1 for liner

Mopar 68584184AA Radio

Aftermarket AT310961 Wiring Harness

Case 76073446 Support

Oshkosh 64112CX Diff Lkout Chamber

Dana 123909 Spicer Highway Sleeve

Aftermarket AZ51809 Shaft

Stanadyne Diesel Corp 05513 Part

340661-154 Engine Overhaul Kit for PAI

Dana 140000 Differential Case Kit Plain, Half Case

Komatsu 562-15-12390 Plate

Redneck Trailer 2602212 25k 5.0 Ax 12 Mh U/S Weld On

International 3615549C93 Seat Driver Hi Air Susp Vinyl

Aftermarket AT76283 Wheel

Aftermarket AW35304 Blade Kit

2686361 Housing Filt for Caterpillar

Aftermarket 9042356 Hydr Pilot Control Valve

Agco 546208D1 Harness

Agco 4260662M2 Case

68312543ZE Multi Media Radio for Chrysler

Detroit Diesel EA4720503802 Camshaft Frame Kit

Hyster S01787750005 Controller Combi

Komatsu 723-11-01420 Valve Asm

Fox 88306200 Kit: 21 2 Wd F150 Front 2.5 for Ford

Gm 25851475 Radio

Hyster S01348220010 Wheel

Paccar P92-9086-1100300 *

Case 31L6-02150 Motor Electric

Meritor 3892S4023 Spur Gear

Case H4616544 Board Printed Circu

FR3Z6362900HD Cover Asy Seat Cushion for Ford

Schaeff 5821661028 Cable Harness

Case YY30V00062F1 Valve Control

Agco WR704468 Belt

1379794 Tube As for Caterpillar

Case 04671430 Mounting Parts

Mach M11-597139 Gear Set 5.29

Case 87326446 Board Printed Circu

7I1086 Barrel for Caterpillar

Us Tarp 14076EZHD-BA 4 Spring 4 Spring

Yale 580000931 Cylinder

Case 72114436 Barrel

Link Belt BLG0189 Coupler

Komatsu R707-11-11A00 Cylinder Barrel

Acdelco 177-1175 Front Disc Brake Rotor

Case 815211C21 Hub

4431914 Harness As for Caterpillar

Komatsu 5026136 Gear Ring

Delphi 9320A280W Part

Kenworth P92-5014-11100 Harness Ip Manual Trans

Mitsubishi 51056668 Tube Axle

Liebherr American 7368869 Rubber Element

Komatsu 14X-15-52311 Carrier

Doosan 3.444-00005 Rod Ass'y

Aftermarket AT174388 Link Bellcrank

Icon 58747C Ext Trvl 2.5 Vs Rr Cdcv Colovr Kt

Komatsu 207-62-83490 Valve Asm

0964321 Carrier for Caterpillar

Komatsu 707-00-0C860 Cylinder Asm Swing

Agco AG722711 Bearing Pillow Block

Komatsu 723-11-01410 Valve Asm

Axletech 3891W1921 Pinion Planetary

Doosan 622-00409 Panel;Door Ass'y

Terex 622-00409 Panel;Door Ass'y

Case 86729858 Support

Aftermarket AZ59866 Control Valve

Mitsubishi 9427103400 L/B 5 M20 C W1000

Mitsubishi 1141712 Load Kit Whl

Case 119260A1 Extension

Schaeff 6501089003 Tube Cyl

Carrier 08-00206-10SV Cond Retrofit Kit,Marinize

Mack 4103-5010450918 Manif

Gm 12389904 Gear Set Diff Ring  Drv P

Cummins 5658396 Blem Scratch  Dent; Possible Rustw/Liners Part # 5658395

Mopar 6RN58VXWAA Wheel

Peterbilt M92-6078-001 Harness Aftrtrtmt Mx11 320

Peterbilt K3980 Kit Lever Shift Electronic Rho Cobra

Case 89500418889 Bracket

Terex 1187050 Conditioned Shutoff

Bezares Usa PT120X13DDA Power Take (Pto) Assembly Rear, Heavy Duty,

Replacement 3T8098 Brake Pump for Caterpillar

Komatsu 19M-30-11382 Plate

Garrett 802774-5008S Turbocharger Service

Capacity 137255K Capacity Of Texas, Inc.

Case 84807553 Axle Front

Komatsu 417-22-32411 Shaft

Turbo Solutions NHA8269 Turbocharger, He351 Ve 4034309 5494878 Actuator

Komatsu 6162-63-4100 Tension Asm

Aftermarket T35902 Pivot

Hammond Power Solutions 194171 Transformer 51 Kva 230 Pri 460 Sec

Komatsu 723-11-01430 Valve Asm

Komatsu 561-88-68730 Piston

Hyster 1639766 Hydraulic Pump

Mitsubishi 9430491030 Tilt Cylinder Asm

Horton 99A8652 Dm Advantage Fan Clutch

Trp RF913303254 Air Brake Compressor

Kobelco LF32T01007F3 Kit Rer for PAI

Miller Electric Manufacturing Co. 240626 Circ Card Assy,Fr Pnl  Di

Hyster 1688554 Brake Asm

Fairfield Manufacturing Co S1CA33S5 Swing Drive Asm

Komatsu 135-12-31110 Cover

Doosan MX351693 Manifexhaust

Zf 4474-353-056 Output Shaft

Kenworth J19-1024-32112S Column Asm Steering Tilt/T

Aftermarket RE36464 Hydraulic Cylinder Barrel

1740722 Tube A for Caterpillar

Acdelco 12668716 Head Asm Cyl (W/ Vlv)

Case D87071 Valve

Case 230605A1 Valve

Komatsu 66978A Valve

Case 79056939 Valve Control

Bezares Usa PT120X13DSB Power Take (Pto) Assembly Rear, Heavy Duty,

Mack 24214524 Cam Kit

Stanadyne Diesel Corp 05694 Part

Komatsu 708-27-00282 Cylinder Block

Komatsu 42U-17-H0T08 Gear Pump Asm

Komatsu 600-633-6900 Fan

A3760960899 Fuel Injector for liner

Kobelco LV22V00003F2 Valve Assy, Relief

WAB 400 866 581 0 Abs Electronic Control Unit 6 S6 M Esc W/18 for liner

Mack 20QC4322 Steerring

International 1697750C92 Radiator Beta L/Oil Cooler

Muncie Power Products SH8SU6809P1IX Muncie Pto

Morimoto LF508 Xb Ld Headlgts Fd Super Duty