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。

 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

  SY12-AC-RC Programmable Logic Controllers (PLCs)

  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

Lutron  1 Lighting Controls

Lutron  1 Lighting Controls

Crouse Hinds  10250TBG Control Panels and Accessories

 NSIOC-16DI-AC110 Programmable Logic Controllers (PLCs) 110V

  ELC2-PB12NNDP Programmable Logic Controllers (PLCs) Programmable Logic

Thomas & Betts  MS212C Light Switch and Control Accessories

  ELC-PS01 Programmable Logic Controllers (PLCs) 1A 240V

  ELC-EX08NNNR Programmable Logic Controllers (PLCs) 1.5A 24VDC 50/60Hz

  ELC-CARS485 Programmable Logic Controllers (PLCs)

Nora Lighting  NLPR-RGBWCONT Other Lighting Switches/Contactors/Controls

Allen Bradley  800T-N10 Other Motor Operation and Control

 NNIOC-16DI-AC110 Programmable Logic Controllers (PLCs) 110V

  EU5E-SWD-4D4D Programmable Logic Controllers (PLCs) 0.5A 24VDC 8 input

Wattstopper  WS-277 Light Switch and Control Accessories

  PXES4P24V Programmable Logic Controllers (PLCs) Ethernet Switch 120V 4

 NSTRE10B40TD Other Contactors IEC Control Relay 4P 48 24V 50/60Hz

Hubbell  HBL320P4W Light Switch and Control Accessories 20A 125V

RIB Functional Devices Inc.  RIBMNLB-6 Programmable Logic Controllers (PLCs)

Automatic Timing and Controls  3-0329A366Q1X Time Delay Relay 5A 120V

  PXES4P24V Programmable Logic Controllers (PLCs) Ethernet Switch 120V E

CONTROL CONCEPTS  D-DIN32R Surge Protection Devices (SPDs)

  ELCB-PB14NNDR Programmable Logic Controllers (PLCs) 14-I/O ELCB PLC

Hubbell  HBL1556L Other Lighting Switches/Contactors/Controls

Nora Lighting  NLPR-DWC-RGBWCONT Other Lighting Switches/Contactors/Controls

  SWD4-SML8-20 Programmable Logic Controllers (PLCs)

  M22-C2-M2V Control Panels and Accessories

Wattstopper ELCU-200 Light Switch and Control Accessories

1  Wattstopper ELCU-200 Light Switch and Control Accessories

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

Leviton  VRCS1-1LZ Light Switch and Control Accessories

  DXA-EXT-3RO Motor Drives/VFDs/Speed Controllers

Optimation Inc.  SF-429217 Programmable Logic Controllers (PLCs)

 M22-LED230H-B Light Switch and Control Accessories

 NSTCEXSBN11 Auxiliary Contact Motor Control 2P 10A 1NO 1NC

Acuity Controls  WSXA-PDT-WH Other Sensors and Switches

Comtrol Corporation  SF-409123 Programmable Logic Controllers (PLCs) ISA

Hubbell CU120A Light Switch and Control Accessories

  SY-E4-DC-4PE1 Programmable Logic Controllers (PLCs) Extension Module

Crouzet  SM-IAC5 Programmable Logic Controllers (PLCs) 30VDC

  ELCM-EX08NNNR Programmable Logic Controllers (PLCs) Programmable Logic

  ELCM-EX16NNDN Programmable Logic Controllers (PLCs) Programmable Logic

  MMX-REMKEY-TEXT Programmable Logic Controllers (PLCs) Text Keypad

 M22M-W Other Lighting Switches/Contactors/Controls

Honeywell   Other HVACR Controls and Thermostats

Thomas & Betts  PB416A Light Switch and Control Accessories

  H1235 HVACR Replacement Parts

Carrier  SF-408446 Programmable Logic Controllers (PLCs) Display w/ Circuit B

  H2107B-3 HVACR Replacement Parts

Square D  9001BG107 Control Panels and Accessories

Hubbell  ATD1000C Other Lighting Switches/Contactors/Controls

Leviton  ODC0P-W Other Lighting Switches/Contactors/Controls

Acuity Controls  CMRB10 Occupancy Switches

TELCO  LR100NG5 Other Lighting Switches/Contactors/Controls

CONTROL CONCEPTS  I-201 Programmable Logic Controllers (PLCs)

Acuity Controls  MP20 Other Power Supplies 20A 277V

Leviton  VRS15-1LZ Light Switch and Control Accessories

 NSTRM10A22A Miniature Control Relay 4P 110/120VAC 50/60Hz

 M22 S-WLKV-Y Light Switch and Control Accessories

Precision Multiple Controls  P3-275 Proximity and Photoelectric Switches

Acuity Controls  PTS-60-WH Other Sensors and Switches

  86-2588 Control Panels and Accessories

Ripley  6390-FAA Light Switch and Control Accessories

  DX-SPL-RJ45-2SL1PL Motor Drives/VFDs/Speed Controllers

Tpi  TBD Other HVACR Controls and Thermostats

 Tpi  TBD Other HVACR Controls and Thermostats

Wago  2789-9080 Programmable Logic Controllers (PLCs)

  HT8AAHAB Motor Controllers Non-Illuminated 1NO 1NC Black NEMA 1, 2, 3,

Datalogic  93ACC0227 Light Switch and Control Accessories

  ELCM-EX08NNDN Programmable Logic Controllers (PLCs) Programmable Logic

Acuity Controls  PTS-720-GY Other Sensors and Switches Time Switch 277V Gray

Thomas & Betts  MS206C Light Switch and Control Accessories

Thomas & Betts  A863D Control Panels and Accessories Mud

Kichler 337012IV Light Switch and Control Accessories

Whitman Controls  P119G-25H-K12TB Other Sensors and Switches Pressure Switch

Hubbell  UL924SR2 Light Switch and Control Accessories

Nora Lighting  NLPR-ZONECONT Other Lighting Switches/Contactors/Controls

Acuity Controls  LSXR-10 Sensor and Switch Accessories

THOMAS & BETTS  FS112C Light Switch and Control Accessories

Idec Izumi Corporation  PS5R-A05 Other Motor Operation and Control

Acuity  LITH-DLL127F-1.5-JU Bulb/Ballast/Driver Accessories LED Control 277V

Hubbell  P2613-30 Other Lighting Switches/Contactors/Controls

  M22-SWD-I3-LP01 Programmable Logic Controllers (PLCs)

Kichler 337010ALM Light Switch and Control Accessories

  E22LED612YN-GR Other Lighting Switches/Contactors/Controls

  H1229 HVACR Replacement Parts

Leviton  6299 Other Lighting Switches/Contactors/Controls

Square D  TSXRAZ01 Programmable Logic Controllers (PLCs) 5

  ONW-D-1001-MV-N-G Light Switch and Control Accessories

Kichler 337010WH Light Switch and Control Accessories

Acuity Controls  NPOD-KEY-WH Other Sensors and Switches

Precision  P7275 Other Lighting Switches/Contactors/Controls

Ohmite  5001E Control Panels and Accessories

KB Electronics  KBWC-15 Motor Controllers

 KB Electronics  KBWC-15 Motor Controllers

Lutron  MA-S8AM-WH Lighting Controls

Lutron  NTV-1000 Lighting Controls

  DMK Control Panels and Accessories

Hubbell  1223W Other Lighting Switches/Contactors/Controls

Leviton  5627-I Light Switch and Control Accessories

Hubbell  6018 Light Switch and Control Accessories

  C22S-WK-K10 Motor Controllers Selector Switch 1NO Black/White Push But

Icc  ICMPP12V5E Control Panels and Accessories

Elastimold  20MAGBG Control Panels and Accessories

Hubbell  CS1223BU Light Switch and Control Accessories