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

Unit Rig Replacement 1016291 Turbine

Meritor KIT349 Meritor Genuine Differential Rer Kit for PAI

Komatsu 56D-02-11991 Exhaust Stack

26000-RYE-427 Converter, Torque for Honda

Hyster 0301039 Drum Brake

Taylor Forklift 4517-127 Convt Hsg

DV6Z58632A22R Pad Seat Cushion for Ford

IHI Turbo B55CND-S0052B Ihi Turbocharger Rhb52 Yw

Case 87648288 Package Service

3596366-B Turbo, Hx82 A  Painted Takeoff3596366, 5323943, 403301 for Cummins

A09-11194-620 D/L 1810 Fr Srb M/S for liner

Aftermarket AT311404 Rotator

8244 Turbocharger Aset for PAI

Komatsu 707-00-0H560 Cylinder Asm

68420683AA Differential Differential for Chrysler

Komatsu 21T-54-72760 Glass

Webasto Heater 5013914A Diesel Air Heater 12 V, Diesel, Tandem 717, With

A17-19479-001 Reinf Assy Hood Front,Vertical for liner

A17-19479-000 Reinf Assy Hood Front,Vertical for liner

Case 8998340311 Radiator

5473184RX Air Brake Compressor for Cummins

Horton 79A9766RMAN Clutch Fan

Mcneilus 1143104 Pto Muncie Cs20 A1007 H3 Kx

Aftermarket AL79789 Drive

Trp RF41300334 Cci Comp W 2 Grv Clutch

5633492RX Air Brake Compressor for Cummins

Chelsea 282XGAJX-V3RK Power Take (Pto) Assembly 282 Series, Power Shift

Hyster 0306225 Gear  Pinion

4T4574 Cylinder G for Caterpillar

Ironman 4 X4 065CBKPS2P Stage 2 Foam Cell Pro Lift Kit For

6378204RX Kit Turboactuator for Cummins

Chelsea 281GBFJP-B8RK Pto Assembly

Vermeer 296416588 Reduction Asm 1:4 71

Aftermarket F123739 Drive Shaft

Aftermarket AH140599 Frame

Horton 99A9885 Dm Advantage Fan Clutch

Mitsubishi 1G622-17013 Turbocharger

Mack 23005321 Transmission Clutch Kit

25FL467001 Cv Axle Assembly for liner

Garrett 856801-5068S Turbo Assembly Kit T3 / V Band 0.82 A/R

Garrett 856801-5071S Turbo Assembly Kit T4 / V Band 0.82 A/R

Autocar 79A9798 Horton Reman Fan Clutch

Chelsea 272GDHVPB5XD Power Take (Pto) Assembly 272 Series, Power Shift

CR3Z6049C Cylinder Head Asy for Ford

CR3Z6049D Cylinder Head Asy for Ford

TDAEX225L270XX000 Disc Brake Caliper Left Hand for Volvo

Hyster S01318760050 Altered Fan Shroud

Hendrickson 68967-001 12.5 K Ste

Komatsu 842360020 Kit Motor

HDC010380DT Design Style Copper Brass 4 Row Dimpled Tubes Heig for liner

Jost NB9P Fifth Wheel Trailer Hitch Bracket

220SK138-1 Knuckle Steering for Eaton

Schaeff 6500757000 Cylinder Hyd

Vermeer 296358025 Stake Aggresive(2pc)

Ridewell R200D567X715 20 K Taper .62 Wl 6"Dp 71.5

A18-46682-013 Sleeper Door Assembly Sleeper Access, With Wind for liner

Bendix BW K149715SC Air Disc Brake  Service Cal

Case 84339949 Cylinder Block

Mecc Alte T16F-130_0357697K Alternator 6k Va 230/400 V 50 Hz 3 Ph

Paccar 817094 Steering Knuckle Integral Assembly, Right

Liebherr American 931328401 Drive Shaft

Aftermarket 843083100 Turbine

Mitsubishi 0353802 Pump Asm

Case 1307210C2 Auger

Chelsea 282GMAJX-A3XD Power Take (Pto) Assembly 282 Series, Power Shift

Komatsu 723-21-06400 Hammer Sub Asm

Chelsea 524XTDBX-A-XK Ptoassy

Axletech 3202T9588 Axle Shaft

Chelsea 280GSFJP-B8XD Power Take (Pto) Assembly 280 Series, Powershift

DW 245-347-0005 Pump Delphi Common Rail Jcb 444 4.4 L Dieselmax

Aftermarket RE68482 Flywheel

Meritor 3819A365 Brake Drum

Hyster 1633779 Steering Hand Pump

Vermeer 296377557 Clevis Kit

1625828 Cylinder Asm for Caterpillar

Euclid E12200342A 15.5 Eca Clutch

Alliance ABP-N25-122002-35A Clutch 15 1/2" X 2" Ms, 4200 /

Dana 240923 Spicer Highway Control

1111583 Housing As for Caterpillar

Komatsu 428-54-25132 Handrail

Mcneilus 2FS631 Motor Rb Hyd

Hyster 2053774  Lift Cyl Assy

Axletech 3202M8957 Axle Shaft

Chelsea 282XGAJX-A3XD Power Take (Pto) Assembly 282 Series, Power Shift

Vermeer 900964003 3 X10 Cylinder Asm

Komatsu 04452060 Clutch 5 Speed E

Meritor 3202A9491 Axle Shaft

Case 84043222 Differential

Hyster 4644307  Lift Cylinder

A03-35654-287 Ftk 50 G Rf Ih Pol for liner

Komatsu 21K-03-71814 Radiator Asm

AXTSA88401411 Wheel Hub for liner

Hyster 2058320  Lift Cyl Asm

Case 84219115 Axle Front

Dana 10005953 Differential Ring And Pinion 4.78 Gear Ratio, 12.25 In. Ring

PH Crane 1039Z280 Piston

Komatsu PB8711 Compressor

Replacement 3P6584 Replacement 3 P6584 Other Parts for Caterpillar

Wabco WAB 400 871 574 0 Advance Driver Assistance System (Adas) Rada for Cummins

Hyster 1618372 Shaft Axle Lh

AXT 3219N4590 * for liner

Fuchs 6036028203 Intake

Case 84521419 Transmission Housing

Case YM01V00008R800 Kit Rer for PAI

Agco AG700055 Chamber

Hyster 1341539 Cylinder

Ken Tool 80000 Bendix Adb Service Tools, Complete Kit, Includes 800080002

Racor Filters 035589-030 Air Cleaner

Chelsea 282XKAJX-A5RK Power Take (Pto) Assembly 282 Series, Power Shift

Haldex DQR0001 Gemini M Dx® Air Brake Dryer , With Heater, Consep Adv

Chelsea 282XGAJX-A5RK Power Take (Pto) Assembly 282 Series, Power Shift

Kalmar JP101203 Hydraulicsvalve Plateassembl

Aftermarket AZ29807 Guard

Kalmar 90023844 Lube System Kit

Epiroc 3363095719 Blade

Fleetrite WK1876205 Engine,Kit,Engine Overhaul I 3

Parker Hannifin 101-2383-06 Ballscrew Gz 20 Mm X 71.38

Alliance ABP-N49-DXN0613-C Doc Isx (CG) *D for Cummins

Case 84246636 Cylinder Block

Trp USA4247SCPW Tire Snow Chain

Marmon Herrington RC221224 Axle Shaft Short Spline

Kalmar N5359680 Wiring Set

MX1302-032 Engine Kit W/O Pistons for PAI

Icon 54300 05 23 Tacoma Lower Control Arms

Dana 070SF134-2X Dana  Oem, Axle Shaft Assy

5V4075 Gear for Caterpillar

Case 8900194831 Shaft Drive

818060 Integral Knuckle Assembly for Eaton

Mack 3088-PT3300PZE643DA 6 Bolt Hot Shift,Pressure

Omega Environmental Technologies 7811505 Hd Turbo

3219740 Kit Pump for Caterpillar

Komatsu 428-54-25210 Handrail