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。

ALLEN BRADLEY 960128 ISOLATED OUTPUT MODULE BOARD

ALLEN BRADLEY 960206 PLC BOARD

ALLEN BRADLEY 960208 CIRCUIT BOARD

ALLEN BRADLEY 960420-01 FT03 BOARD

ALLEN BRADLEY 96058806 BOARD

ALLEN BRADLEY 96058935 BOARD

ALLEN BRADLEY 960672 CIRCUIT BOARD

ALLEN BRADLEY A70300 CIRCUIT BOARD

ALLEN BRADLEY BOARD 40846-155-51

ALLEN BRADLEY CARD 6160CPA1 SER. B

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ALLEN BRADLEY DP2X20 DISPLAY BOARD

ALLEN BRADLEY DRIVE BOARD 503182 TERMINAL CONNECTOR

ALLEN BRADLEY DRIVER BOARD 50246

ALLEN BRADLEY DRIVER BOARD 50399

Allen Bradley E2364SPM03A Pcb Circuit Board Ser A

ALLEN BRADLEY IMB268-4 MEMORY BUBBLE BOARD 921074 REV-2

ALLEN BRADLEY MAIN REGULATOR PCB 103620 REV. 05

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Allen Bradley OS 5580 Pcb Circuit Board

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ALLEN BRADLEY PCB BOARD 103619 REV. 08

Allen Bradley PN-385416 Main Control Board

ALLEN BRADLEY PN-C30165 CIRCUIT BOARD 140311

ALLEN BRADLEY S50387-002 LOGIC MODULE PC BOARD

ALLEN BRADLEY S50390 DISCHARGE ASSEMBLY BOARD

ALLEN BRADLEY S50406 DRIVER POWER SUPPLY BOARD

ALLEN BRADLEY S50411-002 DYNAMIC BRAKE BOARD

ALLEN BRADLEY S50905-002 DRIVER BOARD 7.5/10HP

ALLEN BRADLEY SA3100-SPM02A SER.A LED BOARD

ALLEN BRADLEY SA3100-SPM03A SER.A CONNECTOR BOARD FACTORY SEALED

Allen Bradley SK-H1-ASICBD-D1300 Pcb Circuit Board Ser C

Allen Bradley SK-R1-MCB1-PF753 /A PowerFlex 753 400/480VAC Main Control Board

ALLEN BRADLEY SP-120663 DISPLAY BOARD KIT 3-200 HP

Allen Bradley SP-126511 Pcb Circuit Board

ALLEN BRADLEY SP-135893 CIRCUIT BOARD

ALLEN BRADLEY SP-142507 KIT PC BOARD MAIN CONTROL

ALLEN BRADLEY SP-142535 BOARD

ALLEN BRADLEY SP-142535 PRECHARGE BOARD

ALLEN BRADLEY SP-151097 ASSEMBLY PCB CIRCUIT BOARD

ALLEN BRADLEY SP-151160 PC BOARD BASE DRIVER

ALLEN BRADLEY SP-151174 PC SUPPLY BOARD

ALLEN BRADLEY SP-151177 POWER SUPPLY BOARD

Allen Bradley SP-170131 Dc Drive Field Pulse Board Rev 02

ALLEN BRADLEY SPEED METER BOARD 50381 REV. 05

Allen Bradley T4KL0960YD Light Curtain Transmitter 24v-dc

ALLIED TELESYN ATA-2000BTHPNP-001 ETHERNET ADAPTER CARD

ALLTRONIC 4919288-00 RELAY BOARD

Alpha Funkwerk Neustadt Binärprüfkarte BPK001 24V Dc Binary Test Card Module

ALPHA OMEGA 288-1367-250 CIRCUIT BOARD

ALPHA-OMEGA UDN-2595A CONTROL BOARD

Alstom D-984-0578-05 Pcb Circuit Board Rev 01

Alstom D-984-0579 Frequency Detection Pcb Board

Alstom D-984-0581 Fault Alarm Board Pcb

Alstom DFI-150-0003 Pcb Circuit Board

Alstom G60282-31628 Pcb Circuit Board Assembly

Alstom V4559828-0001 Epic Iii Pcb Circuit Board

Altek A8110A4 7-24-70 Pcb Circuit Board

ALTERA 6XX-40004R-OE Stratix II GX Trasceiver Signal Integrity Board Rev D

Altera Stratix iii alt6xx-40385r-od development board

AMAT APPLIED MATERIALS 0100-00722 PCB ASSY PORT SERVER DISTRIBUTION

Amat Applied Materials 0100-02157 Contactor Control Endura 300mm Board

AMAT Applied Materials 0100-02186 Chamber I/O Distribution PCB Endura

AMC 205-845-00 REV. C BOARD

AMERICAN DYNAMIC 0305-8490-01 CIRCUIT BOARD

AMERICAN DYNAMICS AD2016VM-3 CIRCUIT BOARD

American Msi Corp C3201.005.030 Control Card Rev 5.1

AMERICAN PCB-ATC-SSR-2

AMERITHERM 003-0011-1 CIRCUIT BOARD

AMETEK 100-0117 300.0474-A CIRCUIT BOARD

Ametek 100-0117 Pcb Circuit Board Rev A

AMETEK 100-1771 300-9163 CIRCUIT BOARD

AMETEK 300.0292-A CIRCUIT BOARD

Ametek 7090008 Pcb Circuit Board Rev Fghjklmn

Ametek 71862SE Filter And Shield Assembly

Ametek 73938SE Oxygen Sensor Main Operation Pcb Circuit Board

Ametek 80-230602-90 Pcb Circuit Board

Ametek 80-239500-90 Pcb Circuit Board

Ametek 80-239601-90 Display Pcb Circuit Board

Ametek 80300SE Pcb Circuit Board Rev G

Ametek 80300SE Pcb Circuit Board Rev M

AMETEK 80308SE DISPLAY BOARD

Ametek 80308SE Display Pcb Circuit Board Rev B

Ametek 80378SE Pcb Circuit Board Rev A

Ametek 80408SE Pcb Circuit Board Rev G

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AMETEK 80419K INTERFACE PCB BOARD

Ametek 80436SE Pcb Circuit Board Rev H

Ametek 80438SE Keypad Pcb Circuit Board

AMETEK 80466SE CIRCUIT BOARD

Ametek 80-9210837-90 Relay Pcb Circuit Board

Ametek 80-9215912-90-D 80-9215900-01-A Pcb Circuit Board

AMETEK 80-9230304-90 REV D ANALOG SYNC BOARD

Ametek 80-9230304-90 Solidstate Analog Sync Board

Ametek 80-H2004410-90 Pcb Circuit Board

AMETEK DAA-T2010-010 CONTROL BOARD

Ametek Drexelbrook Z-tron Iv Level Switch 115/230v-ac

AMETEK MCB51037M0 CONTROL BOARD

Ametek MPC-09001-012 91MB04E-1 Panalarm Pcb Circuit Board

AMETEK MPC-09001-012 CIRCUIT BOARD

Ametek Ris SC-1372-T6-A1-H3-P11-3P Isolated Rtd Transmitter Pcb Circuit Board

Ametek RXLX-0 700-1202-021 Intellipoint Level Switch 85-250v-ac

AMETEK RXT3 INTELLIPOINT REMOTE w/ 385-0048-003 CONTROL BOARD

AMF BOWLING 042-66140400 SERVER POWER BOARD

AMK Pcu MC-SMTC Servo Controller Board Revision 01 Control Unit Servo

Amp 35-402253-02 Pcb Circuit Board

Amp F9328FA-0 Pcb Circuit Board

Amp F9328MA-0B F9328JS-01 Pcb Circuit Board

AMPLAS 2354 PC BOARD

AMPLAS 963-497 REV.O BOARD

AMS 46551-494 RELAY BOARD

AMT Measure Card PME-30 Measuring Card PME Sc 090296 000359 Standardverstärkung

AN-2104A BOARD

ANACONDA ADVANCED TECHNOLOGY PB-D-0777-06 CIRCUIT BOARD CARD

ANALOG DIGITAL CONTROL ADC BOARD P-5281A

Analygas Systems 23H 22-23-1910 Pcb Circuit Board

ANDERSON ELECTRIC CONTROLS 5447-02 PWM BRAKE BOARD

ANDERSON INSTRUMENT 56000-A71 REV. D BOARD

ANDOVER CONTROLS 01-1000-174 CONTROL BOARD

Andover Controls DO-20 05-1001-279 Control Pcb Circuit Board Rev C

Andrew TDPX SMR800 Ion-b Duplexer Pcb Circuit Board

Anritsu 322U13634 A05 scan / AD board

ANRITSU 322UI4832 03 MONITOR BOARD for MD8430A SIGNALLING TESTER RTD

Anritsu 52225-3A Auxilliary Board For MG3694A

Anritsu 52242-3A Yig Loop Board For MG3694A

Anritsu A03 CPU 322U14225 board for MS2668C

Anritsu A06 IF BPF 322U13830 MM200015A board