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。

 NSB 9575H3A000 General Purpose Relay 30A 120V 50/60Hz

Edwards NSB 6254B-003

Siemens NNB 3TX7002-4AG00 Relay Accessories

Edwards NSB SIGA-CRH

RK Industries NNB CSB-115A-4-3S

 USD 7802C83G11 Other Power Supplies Ground Alarm/Power Supply Module 120V

Siemens NSB 3ZS1312-6CC10-0YA5 PLC Modules

 NNC-CPU202-EC4M-XV PLC Modules

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 NNIOC-4AI-2AO-U1-I1 PLC Modules

Allen Bradley NSB S201051 PLC Modules

 NSB EU6E-SWD-4D4D-1 PLC Modules

Idec Izumi Corporation NSB 5100541 PLC Modules

 NSB OPTLAV PLC Modules

B&r NS20BB82 Programmable Logic Controllers (PLCs) Bus Base Module 24VDC

 NSB PXMP-IM333MV-3 PLC Modules

  WPONI Programmable Logic Controllers (PLCs) Network Interface Module 1

 NSIOC-2AI-1AO-U1-1 PLC Modules

 EU5E-SWD-8DX PLC Modules

 NSB C441K-GR1 Programmable Logic Controllers (PLCs) Communication module 2

 EU5E-SWD-4PT-2 PLC Modules

 NSB C441NS Modbus Communication Module 120V 4 Inputs, 2 Outputs

 NSB EU6E-SWD-2D2D-2 PLC Modules

 NSB SY-E4-UC-16RE1 Programmable Logic Controllers (PLCs) Extension Modul

 NSIOC-16DI Programmable Logic Controllers (PLCs) Input Module 4mA 24V

 NSB EU5E-SWD-X8D PLC Modules

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Idec Izumi Corporation NSB 5100526 PLC Modules

 NSB EU5C-SWD-PF2-1 PLC Modules

Idec Izumi Corporation NSB 5100533 PLC Modules

Idec Izumi Corporation NSB 5100562 PLC Modules

 NSB C320MH3WA0 Auxiliary Contact Control Module Kit  Mechanically Held

 NSN-322-20DI-PF PLC Modules

Idec NSB FC1A-SM1E PLC Modules

  C320MH3WA0 Auxiliary Contact Control Module Kit  Mechanically Held

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Leviton NSB 476TM-612 PLC Modules

Honeywell NSB 4219 PLC Modules

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Idec Izumi Corporation NSB 5100531 PLC Modules

 USD EU5E-SWD-4D2R PLC Modules

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  DIL-SWD-32-002 Other Contactors LED Module 3P 35A 15V 50/60Hz Blue LED

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Wago NSB 788-412 Relay Accessories Relay Module

Panduit NSB CJ688TPIW Misc. Cable and Wire Accessories Mini com module White

toV-303-15-C00-A00-1D PLC Modules

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Siemens  SF-407212 Programmable Logic Controllers (PLCs) Discrete Input Modul

Idec Izumi Corporation NSB FC1A-E1A1E PLC Modules

Hirschman  943727321 Programmable Logic Controllers (PLCs) Fiberoptic Module

Idec Izumi Corporation NWD FC1A-C1A1E PLC Modules

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Idec Izumi Corporation NWD FC1A-E1A1E PLC Modules

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Eurotherm  SF-412010 Programmable Logic Controllers (PLCs) Terminator Module

Schweitzer Engineering Laboratories NSB 2505461XX PLC Modules

Leviton NSB 47611-GT4 PLC Modules

 Leviton NSB 47611-GT4 PLC Modules

Cutler-Hammer NSB 66B2051G01 PLC Modules

Cutler-Hammer  38150060 Motor Drives/VFDs/Speed Controllers

Siemens  6ES5464-8ME11 Programmable Logic Controllers (PLCs)

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Hubbell  HBL1221ILR Light Switch and Control Accessories

  C441Q Programmable Logic Controllers (PLCs) 5A 24V 50/60Hz

Micro Control Company  56G2765 Programmable Logic Controllers (PLCs) PC Oven

  IPONI Programmable Logic Controllers (PLCs) 50A 30V

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PCB Assembly  SF-420210 Programmable Logic Controllers (PLCs) Driver/Receiver

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Idec Izumi Corporation  CVT-DINAV5AC02XX

  SY512-DC-RC Programmable Logic Controllers (PLCs)

  C441T Programmable Logic Controllers (PLCs) Ethernet/IP, Modbus

Dorado  SF-423241 Programmable Logic Controllers (PLCs) Transmitter

Carlo Gavazzi  RSE4812-B Motor Control Centers and Buckets

Hubbell  HBL26402 Light Switch and Control Accessories

Schlumberger  SF-432016 Programmable Logic Controllers (PLCs) Servo Interface

Killark NNCS-0B4-U Control Panels and Accessories

1  Killark NNCS-0B4-U Control Panels and Accessories

  ELC-GP02 Programmable Logic Controllers (PLCs)

B&r NS20BB82 Programmable Logic Controllers (PLCs) Bus Base Module 24VDC

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1    ELC2-PB14NNDR Programmable Logic Controllers (PLCs)

  WPONI Programmable Logic Controllers (PLCs) Network Interface Module 1

toTPAXRHMRY Other Motor Operation and Control

  ELC-CAENET Programmable Logic Controllers (PLCs) 24V

Hubbell  HBL1385I Light Switch and Control Accessories

  C441K-GR1 Programmable Logic Controllers (PLCs) Communication module 2

  ELCM-EX16NNNR Programmable Logic Controllers (PLCs) Programmable Logic

  C400GK12A Starter and Contactor Accessories Cover Control Kit 120V 50/

  ELC-CAENET Programmable Logic Controllers (PLCs) 24V

Fuji Electric  PYZ4-RCY1-4V Temperature Controls

  C400GK3 Pushbuttons Cover Control Kit  HAND-OFF-AUTO

Honeywell  L4029E1011 Motor Controllers

Abb  TEF5-OFF Motor Controllers

3m  SF-433878 Programmable Logic Controllers (PLCs)

  TC485110101 Programmable Logic Controllers (PLCs)

GE  240-314-AAAB Other Motor Operation and Control

  CN13CN010C Motor Controllers Space Saving 3P 45 480V 50/60Hz Size 1C S

  SY-E4-UC-16RE1 Programmable Logic Controllers (PLCs) Extension Modul

Nora Lighting  NATL-SWEX100/24A Other Lighting Switches/Contactors/Controls E

 NSTPB1P6BC1 Motor Controllers Class 10 3P 1-1.6A 600V 50/60Hz 3Ph

  ELC-PB14NNDT Programmable Logic Controllers (PLCs) Programmable Logic

 NSIOC-16DI Programmable Logic Controllers (PLCs) Input Module 4mA 24V

Joslyn Clark Controls  2438 Hter Packs and Elements

Multivac  SF-421418 PLC Cables/Connectors/Accessories Control Terminal

  SY-E4-UC-16RE1 Programmable Logic Controllers (PLCs) 24V

Lithonia Lighting  ELP-L015 Light Switch and Control Accessories

Joslyn Clark Controls  100T-JS5B Selector Switches

Barber Colman Co.  TC-115 Room Thermostats

Carlo Gavazzi  TAD2-250-5A Control Transformers

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  C441P-GR1 Programmable Logic Controllers (PLCs) Modbus Communication M

 USD ELC-CAENET Programmable Logic Controllers (PLCs) 24V

  C320MH3WA0 Auxiliary Contact Control Module Kit  Mechanically Held

  AE16ENS0 Non-Reversing Starters Motor Control Starter 25A 1Ph

 NSTPAXUVR230V50H Other Motor Operation and Control

 USD EU5C-SWD-EIP-MODTCP Programmable Logic Controllers (PLCs)

Carlo Gavazzi  TAD2-1005A Control Transformers

  HT8FBRAFL3 Motor Controllers Illuminated 24V 1NO 2 Position Red NEMA 3

Kichler 371082 Light Switch and Control Accessories

  ELC2-PB14NNDT Programmable Logic Controllers (PLCs) I/O Module 24V 4 I

  C440-QCP Programmable Logic Controllers (PLCs)

Wattstopper  EOSW-112-W Light Switch and Control Accessories

Acuity Controls  CM-PDT-10-R Other Sensors and Switches

  M22S-R10KQ Float and Level Control Switches

  ELC-EX16NNDN Programmable Logic Controllers (PLCs) ELC Expansion 24V 1

Hubbell  WSS-1277 Light Switch and Control Accessories

Rowan Controls  2190-E42AA