AB 1756-DMA31/A 模块 全新原装

AB 1756-DMA31/A 模块 全新原装

AB 1756-DMA31/A 模块 全新原装

AB 1756-DMA31/A 模块 全新原装

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。

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AJINEXTEK AXT BOARD BPHR REV B2.0 V2.0

AJINEXTEK AXT BPHR REV B1.0 SMC-2V01 SMC-2V02 BOARD

AJINEXTEK AXT BPHR REV B1.0, SMC-1V02 V2.1.1 BOARD

AJINEXTEK AXT BPHR REV B2.0 SIO-DB32P V1.2 BOARD WORKING

AJINEXTEK AXT BPHR REV B2.0, SIO-DI32, SIO-DB32P BOARD

AJINEXTEK AXT BPHR REV:B1.0,SMC-1V02 V2.1.1 BOARD

AJINEXTEK AXT BPHR V3.0.2 SIO-DB32P V1.2 BOARD WORKING

AJINEXTEK AXT BPHR V3.0.2 WITH SIO-AI4RB REV B2.2 PCB, ELECTRIC CARD, BOARD

AJINEXTEK AXT BPHR V3.1 SIO-DB32P V1.2 BOARD WORKING

AJINEXTEK DIGITAL INPUT CONTROL BOARD BPRF REV 3.0.1 SIO-D132 3EA

AJINEXTEK DIGITAL OUTPUT CONTROL BOARD AXT BPHR REV 3.0.2 SIO-D032P 2EA

AJNEXTEK AXT BPFR V2.1.1 BOARD REV:B2.1 & COM-234SD [4EA] V1.0,ICJL-003 REV:0

ALADDIN 2000 CARD V1.23 CC V1.23 2-2001 PCB P/N 00845

ALCATEL 104293 FROM ASM 180 FREE SHIP

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ALLEN BRADLEY 1771-IAD/D 120V AC/DC INPUT MODULE LOT OF 2

ALLEN BRADLEY 1771-IFE A ANALOG INPUT MODULE (12 BIT)

ALLEN BRADLEY 1771-OFE1/B REV.W01 ANALOG OUTPUT MODULE

ALLEN BRADLEY 1771-OW16 B ELECTROMECHANICAL CONTACT OUTPUT MODULE

ALLEN BRADLEY 1785-L20B D, 1785L20B PLC- 5/20 TESTED WORKING FREE SHIP

ALLEN BRADLEY 1785-LT2 A PLC-5/25 PROCESSOR MODULE

ALLEN BRADLEY 1785-LT2 A PLC-5/25 PROCESSOR MODULE LOT OF 2

ALLEN BRADLEY 24 VDC SOURCE INPUT 1794-IV16 (5) SINK OUTPUT-PROTECTED 1794-OV16P

ALLEN BRADLEY AC SERVO CONTROLLER AXIS MODULE 3KW 1394C-AM04 SERIES:C FREE

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ALLEN BRADLEY PANELVIEW 1400E 2711E-T14C6 SER E REV A FREE SHIP

ALLEN BRADLEY PLC SET PWR220 CPU750B POSI4 X32D 2EA Y32T

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ALLIED TELESIS RE2000 PLUS BOARD 845-01414-04

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ALPHA GMBH SP 075S-MF1-4-0E1-2S GEARHEAD REDUCER

ALPHA GMBH SP 075S-MF1-4-0G1-2S GEARHEAD REDUCER

ALPHA GMBH TP 025-MF1-10-041-000 GEARHEAD REDUCER

ALPHA ROBOTICS ACTUATOR AR060-S1-100-10B-N 490mm

ALPHASEM AG PC/AT INTERFACE BOARD AS257-0-02 REV:C

ALSTOM MCU 032.08.3,029.115 386 BOARD

ALT APPLIED LASER TECHNOLOGY ALT-8571

AMAT 0190-03705 BOARD DIP 15049804,DIP 498,CDN500-10 DIP:208-020

AMAT 0190-03705 BOARD DIP 15049804,DIP 498,CDN500-10 DIP:214-048

AMAT 0190-04397 DIP CDN496 BOARD DIP:164-200,15049602

AMAT 0190-04397 DIP CDN496 BOARD DIP:513-060,15049602

AMAT APPLIED MATERIALS CDN491 DIP BOARD 0190-04457 DIP:387-410

AMAT APPLIED MATERIALS CONTROL BOARD 0100-76269

AMAT APPLIED MATERIALS SIGNAL CONDITIONING BOARD PRODUCER SE 0100-01363

AMAT CDN491 BOARD 0190-04457 DIP:533-135

AMCODYNE 140-00470-404G,141-00470-401C BOARD

AMESS 8 AXIS CONTROLLER BOARD REV:1.1

AMP BOARD P/N 171-0549

AMPERE Board M-6745,PC-195C

AMPERE M-6002B CMOS 90.9.1540 REV. A PC-302B PCB CARD ELECTRIC BOARD

AMPERE M-6780 PCB-225B BOARD

AMREL AMERICAN RELIANCE INC LPS-305 PROGRAMMABLE LINEAR POWER SUPPLY

ANELVA 954-7700 VACUUM SWITCH

ANELVA 954-7720 VACUUM SWITCH

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ANELVA M-430HG/JIS ION GAUGE POWER ON TESTED

ANELVA NANO-SCOPE,MICROSCOPE 911-9150,TOKYO OLYMPUS R10X

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AOS SCANNER INTERFACE BOARD 297-14831-1 REV B

AOS TERMINATION BOARD 398-20448-1 REV.D,297-14837-1 REV.A

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APC 48VDC BATTERY MODULE RBC43  FREE SHIP

APEX 040:1 GEARHEAD AB/F 042-S2-P1  FREE SHIP

APEX DYNAMICS AB/F 042-S2-P2 RATIO: 8:1 GEARHEAD REDUCER

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APPLIED MATERIALS Controller Distribution WPS Board 0100-70019

APPLIED MATERIALS Intelligent Interface Board 0100-09056 Rev. G

APPLIED MATERIALS MUX COMMUNICATION MODULE 1280127 BOARD POWER ON TESTED

APPLIED MATERIALS OPTO DETECT BOARD 0100-00014 0110-00014 REV H REV D BROKEN

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APPLIED MATERIALS TC GAUGE P.W.B BOARD 0100-00008 REV K

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APPLIED MOTION PRODUCTS HT23-308D MOTOR, F21ZJ4EDB06-1000

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