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

344-0203// AMAT APPLIED 3690-90170 SCREW CSK.HD.MS/ZP M8X35LG

344-0301 AMAT APPLIED 0020-21035 BRACKET SOURCE WATER LINE

344-0301// AMAT APPLIED 0015-77166 PULLEY MODIFICATION

344-0301// AMAT APPLIED 0020-21035 BRACKET SOURCE WATER LINE

344-0301// AMAT APPLIED 0020-76031 BUSHING 150MM WFR CASS HNDLR

344-0301// AMAT APPLIED 0020-76865 PIN HINGE

344-0301// AMAT APPLIED 0021-08690 APPLIED MATRIALS COMPONENTS

344-0302 AMAT APPLIED 0020-75838 APPLIED MATRIALS COMPONENTS

344-0302// AMAT APPLIED 0020-03097 PLATE, U-SHAPED

344-0302// AMAT APPLIED 0020-09437 CLAMP, TUBE 2" FRAME MEMBER

344-0302// AMAT APPLIED 0020-21002 BRACKET, BOTTOM

344-0302// AMAT APPLIED 0020-21832 BRACKET RIGHT

344-0302// AMAT APPLIED 0020-22582 ELEMENT INPUT

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344-0302// AMAT APPLIED 0021-70209 ALIGNMENT PIN, MCA COVER, HTES

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344-0303 AMAT APPLIED 0020-95734 SCREW VAC

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344-0303// AMAT APPLIED 0020-91454 APPLIED MATRIALS COMPONENT

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344-0303// AMAT APPLIED 0021-37880 PIN THREADED QCK WAVEGUIDE ALIGNMENT SH

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344-0303// AMAT APPLIED 0021-77971 JACK SCREW

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344-0303// AMAT APPLIED 3300-02507 FTG PIPE 1/4-18 NPT 9/16 HEX

344-0303// AMAT APPLIED 3300-02516 FTG TUBE CAP 5/8 OD 37 DEG FLARED BRS

344-0303// AMAT APPLIED 3300-02614 FTG HOSE BARB 3/8H X 9/16-18SAE 37DEG

344-0303// AMAT APPLIED 3300-03362 FTG TBG PLUG 3/8T HEX SST

344-0303// AMAT APPLIED 3300-03404 FTG TBG CAP 3/8T SST

344-0303// AMAT APPLIED 3300-03452 FTG TBG RDCR 1/2T X 1T SWAGELO

344-0303// AMAT APPLIED 3300-05093 FTGTBG ADPTR 1/2T X 3/8H-BARB SS

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344-0402 AMAT APPLIED 3320-01101 GSKT STRIP .094 DIA ENDUR-O-S

344-0402// AMAT APPLIED 0020-70481 BAR TIE-OFF BODY CHAMBER

344-0402// AMAT APPLIED 0020-82419 BRACKET CABLE MTG 2G BULKHEAD

344-0402// AMAT APPLIED 0020-82420 BRACKET CABLE MTG 3D BULKHEAD

344-0402// AMAT APPLIED 0050-39120 WELDMENT, TEOS LINE ADAPTER, CENTURA DXZ

344-0402// AMAT APPLIED 1230-01136 SKT RLY DIN RAIL-MTG 11 PIN OCTAL

344-0402// AMAT APPLIED 3300-01062 FTG TBG CONN 1/4T 9/16-18 SST W/ORING

344-0402// AMAT APPLIED 3300-01065 FTG TBG CONN 1/4T 1/8MP SST

344-0402// AMAT APPLIED 3300-02019 FTG TBG CONN 1/4T 7/16- 20 SAE THD SST

344-0402// AMAT APPLIED 3300-02393 FTG TBG ADPTR 3/8T 1/8MNPTX9/16-18

344-0402// AMAT APPLIED 3300-03173 FTG TBG 3/8 37 DEG FTF 9/16-18 SAE BOS

344-0402// AMAT APPLIED 3630-01135 RTNG RING INT 1.875 D MS16627 TYP1 CL3

344-0402// AMAT APPLIED 3630-01141 RTNR RING INT 2ID-HSG X 2.21OD-FREE X..

344-0403 AMAT APPLIED 3060-01119 BRG BALL .125 ID .250 OD W/.25L

344-0403 AMAT APPLIED 3690-02827 SCR MACH BTN HD 6-32 X 1-1/8L

344-0403 AMAT APPLIED 3810-01057 (#1) STUD SELF-EJECT 1/4 TURN SIZE

344-0403// AMAT APPLIED 0227-42688 APPLIED MATRIALS COMPONENTS

344-0403// AMAT APPLIED 100763 STUD, OVAL HD

344-0403// AMAT APPLIED 3150-01004 CAM FOLLOWER 5/8IA.440W

344-0403// AMAT APPLIED 3300-01088 FTG TBG CONN 1/4T 1/4TS SST PORT CONN

344-0403// AMAT APPLIED 3690-01624 *SCREW CPTV HEX HD 4-40

344-0403// AMAT APPLIED 3690-01794 (2PCS) SCR MACH SHLDR 8-32X.1870ODX1/4L

344-0403// AMAT APPLIED 3690-01809 SCREW SHCDK#10

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344-0403// AMAT APPLIED 3950-01014 SPRAY NOZZLE

344-0501 AMAT APPLIED 0020-30911 (6PCS) FLAT WASHER #8X.030 THK SST, N

344-0501// AMAT APPLIED 0015-01003 WASHER MODIFIED

344-0501// AMAT APPLIED 0020-06268 CLEVIS, CYLINDER

344-0501// AMAT APPLIED 0020-09087 BUSHING, SHAFT

344-0501// AMAT APPLIED 0020-10133 BLOCK RF GND

344-0501// AMAT APPLIED 0020-24410 BRACKET INTERLOCK CATHODE LIFT