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

 Listing680369OEM Accessory Drive for PAI

Hyster 0205247 Drive Gear

Agco AG523186 Yoke

Tramac Demolition And Attachments AXRCRB80 Cylindrical Roller Bearing 170mm Od

Hd Electrical DC1-M1027

65510-31700-71 Replacement For Cylinder Tilt for Toyota

AE9Z7427407GB Panel Asy Door Trim for Ford

Meritor KIT2458 Meritor Genuine Differential Planetary Kit

Dana 217619CH Dana Spicer Clutch Cover

Case 76080423 Cylinder

WWS251113410 Clutch Lever Asm for liner

Case 289334A1 Starting Motor

Komatsu 91358940 Clamp Line

Hyster 1392395 Rim Base

57110-SNY-M01 Modulator Assy., Vsa for Honda

Aftermarket F124564 Multi Functional Controlle

Komatsu EM2761 Harness Cab

Peterbilt L77-6306 Reinf Side, Aero 124

Kubota RD531-70010 Asm Valve Boom

Komatsu 65-0445-049 Block

Case 132277A1 Head Cylinder

Case 8919357 Arm Steering

Icon K53031 Leveling Kit Suspension

Jost A450.T2.19 Trailer Landing Gear Outside Mount, 10" X 12" Sand Shoe, 19"

Komatsu 79446373 Retainer

Kracht KP2/25G20W.4DL2/98 Hyd Pump for VW

Meritor 62NYS2611A End Yoke

68046901AC Unified Body Wiring for Chrysler

Komatsu 569-03-89132 Support

Skyline Emissions CJ0419-C Doc Kit Consisting Of 1 Doc, 2 Gaskets, And 2 Clamps

Aftermarket F059510 Valve

Doosan K1008861 Non Returnable, Pump,Gear

1PQ601DVAA Base Panel Instrument Pane for Chrysler

C Cylinder

4008670770 Abs Electronic Control Unit 12 V, With 4 Wheel Speed Sens for Wabco

Case YY22E00131F1 Electronic Control U

Kobelco LF03H01003D3 Hose

Komatsu 20Y-06-15870 Wiring Harness

Bendix 289925 Tu Flo® 700 Air Brake Compressor , Flange Mount,

Komatsu 8234-06-1670 Wiring Harness

3137047 Head Gp Pump for Caterpillar

Kobelco 2414N3786

Holset 6378270H Holset Electronic Actuator for Cummins

39511-S3V-A01ZD Display Nh528 L for Honda

39511-S3V-A01ZC Display Yr204 L for Honda

Aftermarket AH203133 Wheel Bogey

Komatsu 79243073 Kit, Seal

Hyundai Construction Equip. XKBQ-00462 Bearing

7E2350 Adapter for Caterpillar

Meritor EX225H309XX000 Svc Caliper

Aftermarket AT209473 Link

Stanley Labounty 186568 Tip Blade Kit

Meritor A 41714 1 Gear Set

Agco AG518427 Valve Asm 4 Wheeler Cont

Meritor A393823 Gear Set Serv.

Dana 4203755 Dana Spicer Input Shaft Assembly

Marmon Herrington RC221225 Cti Axle Shaft Seal Asm

Komatsu 76874273 Pipe

International 2517627C91 Actuator,Kit, Turbo Actuator

Wacker Neuson Const Eq. 1000205573 Planetary Housing

Kalmar 90032565 Steering Gear

Aftermarket AT156693 Shield, Left Front

Aftermarket AT388348 Crank

Agco 72452862 Piston

3195410 Cont Gp Foot for Caterpillar

Aftermarket AA45047 Rockshaft

Art Industries SK-2482 Suspension Strut Assembly For Mercedes Benz

Liebherr American 10413367 Sun Wheel

Komatsu 707-58-55A80 Piston Rod

Dana 504081 Differential Ring And Pinion 3.90 Gear Ratio, 16.5 In. Ring Gear

Aftermarket AZ50136 Knuckle

Aftermarket T35327 Dura Max Cutting Edge

2864506 Engine Control Module (Ecm) Wiring Harness for Cummins

International HOR991455 Clutch Ht650 152.4 for Cummins

Chelsea 524XMDAX-AXK Power Take (Pto) Assembly 524 Series, Mechanical

Detroit Diesel DDE RA0014465835 Engine Control Module (Ecm) Without Fuel

Case 32.61134 Spider Asm Planetary

Terex 65.99497-8611 Ecu

Hyster S00979520050 Wire Harness

Allison 6774709 Race

Powerstop Brakes KC2164A36 Z36 Truck And Suv Ceramic Brake Pad, Drilled

Detroit Diesel DDE-A4710901055 3 2 Conv

Peterbilt E74-1024 Main Housing Kit

6E1111 Rod A for Caterpillar

Art Industries SK-2483 Suspension Strut Assembly For Mercedes Benz

star S-16447 Power Take (Pto) Hydraulic Tank

Hyster 1450076 Replacement For Hyster Axle

Yale 5800040-48 Replacement For Yale Forklift Axle

Schaeff 5520661485 Control Valve

Garrett 800075-5011S  S63 Left/Drivers Side Turbo for BMW

5295428 Bushing for Caterpillar

Rush Premium Power RPP4307211X  Un Programmed Injector Dr

1903430 Valve Gp Con for Caterpillar

Liebherr American 7622348 Insert Thermostat

Sany 11260748 Undercarriages Electrical Equi

Mazda BR9P67010G Harness Frt

Four Seasons TSN4146 A/C Compressor  Component Kit

Paccar M100PCR1RMAN Steering Gear Rman

Komatsu GE1837 Fuse 300 Amp 2 Pc

Komatsu 17A-902-1290 Net

Hyster 1468372 Head Light Brkt

Case 87738258 Valve Control

Paccar P92-9477-0043700 Harness Chassis Node

Bandit Chippers 900-3942-67 Hydraulic Gear Pump Tandem

Aftermarket AZ50320 Axle Knee

Hyster 180549 Hydraulic Pump

Aftermarket 5HG293876 Wiring Harness

Meritor EX225H310XX000 Svc Caliper

Construction Equip. 21QB-32780 Mcu Asm for Hyundai

4T2493 Rod A for Caterpillar

Hyster 1674452 Cover

5175609 Pin for Caterpillar

Kalmar N5311980 Steering Lever

DW 170-032-3925 DW  Holset Turbocharger He400 Vg for Cummins

Aftermarket RE509327 Flywheel

Am General SP002265 Radio Asm Nav Double Din

Rex Roth R901255107 Control Block T

Paccar D92-1106-10101 Harness Isx98 2.1 Mcab

Case 87639632 Kit

Art Industries SK-2484 Suspension Strut Assembly For Mercedes Benz

Oz Lifting Products OZSS010-10CH Oz Lifting Manual Chain Hoist, Stainless

Aftermarket R78147 Shaft Axle

Komatsu 20D-60-11900 Check Valve Ass

Doosan 450103-00230C Tankfuel

John Deere RE533219 Fuel Injection Pump

PH Crane 1010Z1574 Knuckle Kit

Euclid E12597531 Valve

Generac Power Systems 0D5030H Assy, Stator 200 6.5 Adx Hi

Komatsu 707-27-14970 Head Cylinder

3683964 Manif As for Caterpillar

TDA KIT8341 * for liner