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。
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Remke 75-0102 Light Switch and Control Accessories
Square D GK2-AF01 Control Panels and Accessories
LISTING Factory Sled AB 1769-L24ER-QB1B SER B CompactLogix 750KB DI/O Controller
LISTINGAllen-Bradley 1769-L24ER-QB1B /B CompactLogix 750KB DI/O Controller
Factory Sled AB 150-C9NBR SMC-3 9A Smart Motor Controller 150C9NBR
Allen Bradley 1756-L74 SER B ControlLogix 16 MB Controller 1756L74
Factory Sled AB 1762-L40BXBR SER C MicroLogix 1200 40 Point Controller
Factory Sled AB 1756-L74 /B ControlLogix 5574 Processor Controller 1756L74
Allen Bradley 1756-L75 SER B ControlLogix 32MB Controller 1756L75
Allen Bradley 1756-L73 SER B ControlLogix 8MB Controller PLC 1756L73
Allen-Bradley 1756-L71 SER B ControlLogix 2MB Controller PLC 1756L71
Factory Sled Allen-Bradley 1747-L553 SER C SLC 5/05 64K CPU Processor Unit
Allen-Bradley 1756-L62 SER B ControlLogix 4MB Memory Controller AB 1756L62
Factory Sled AB 1756-L62 SER B ControlLogix 4MB Memory Controller 1756L62
Allen-Bradley 150-F85NBD SER B SMC Flex Smart Motor Controller 150 F85NBD
Factory Sled Allen-Bradley 1756-L73 /B ControlLogix Logix5573 Processor
ALLEN BRADLEY 2097-V34PR6-LM/A Kinetex 350 Servo Driver 2097V34PR6LM
Factory Sled AB 1762-L24BXB SER C MicroLogix 1200 24 Point Controller
Factory Sled AB 1762-L40BWA SER C MicroLogix 1200 40 Point Controller
Allen Bradley 1747-L552 SER C SLC 5/05 32K CPU Processor Unit Factory Sled
Factory Sled AB 1769-IT6 SER A CompactLogix Thermocouple/mV Module 1769IT6
Factory Sled AB 1756-L71S Ser B GuardLogix Automation Controller 1756L71S
Factory Sled AB 1756-EN2TP SER A ControlLogix EtherNet/IP Bridge Module
LISTING1756-OA16 SER A ControlLogix 16 Point D/O Module 1756OA16 Factory Sled
Allen-Bradley 150-F251NBD SER B SMC Flex Smart Motor Controller 150F251NBD
Allen-Bradley 1762-L24BXB SER C MicroLogix 1200 24 Point Controller 1762L24BXB
Allen Bradley 20-750-S4 /A PowerFlex 755/755T Integrated Safety Option Module
2097-V34PR6-LM Allen-Bradley Kinetix 350 3.0kW Servo Drive AB 2097V34PR6LM
Factory Sled Allen Bradley 1756-L72S SER B GuardLogix 5572S Controller 4MB
Factory Sled AB 1747-L551 SER C SLC500 5/05 CPU Processor Unit 1747L551
Factory Sled AB 1761-L32AWA SER E MicroLogix1200 32 Point Controller
Allen-Bradley 2097-V33PR3-LM Kinetix 350 Servo Drive 2097-V33PR3-LM
Factory Sled AB 20-750-DENC-1 PowerFlex 750 Dual Encoder Option Module
LISTING Factory Sled AB 1756-OA16 ControlLogix 16 Point D/O Module 1756OA16
Factory Sled AB 1756-IF4FXOF2F /A ControlLogix 6 Point Analog Combo Module
Allen-Bradley 150-C9NBD /B SMC-3 9A Smart Motor Controller 150C9NBD
Factory Sled AB 1756-IF8H ControlLogix HART Analog Input Module 1756IF8H
Allen-Bradley AB 1762-IF2OF2 /B MicroLogix 1200 I/O Module 1762IF2OF2
Allen Bradley 1769-L35E SER A CompactLogix 1.5 MB ENet Controller 1769L35E
Factory Sled AB 1769-L35E /B CompactLogix 1.5 MB ENet Controller 1769L35E
Allen Bradley 20-750-S3 /A Network Safe Torque Off Module f/PowerFlex750
Allen Bradley 1785-L40E /E PLC-5/40E EtherNet/IP Controller 1785L40E
Allen-Bradley 1762-L24AWA /C MicroLogix 1200 24 Point Controller 1762L24AWA
Factory Sled AB 1762-L40BXB /C MicroLogix 1200 40 Point Controller
Factory Sled AB 1747-L553 SER C SLC 5/05 CPU Processor Unit 1747L553
Allen-Bradley 1756-IF8I /A ControlLogix 8 Point Analog Input Module 1756IF8I
Factory Sled AB 2094-BC02-M02-S Kinetix 6000 Integrated Axis Module
Factory Sled AB 1756-RM2 SER A ControlLogix Redundancy Enhanced Module
Factory Sled AB 1766-L32AWAA SER C MicroLogix1400 32 Point Controller
Factory Sled AB 1756-L64 SER B ControlLogix 16MB Memory Controller 1756L64
Allen-Bradley 1747-L553 SER C SLC 5/05 CPU Processor Controller 1747L553
Allen-Bradley 1747-L551 /C SLC500 SLC 5/05 CPU Processor Unit 1747L551
Allen Bradley 1756-L75 /B ControlLogix Logix5575 32MB Processor 1756L75
Allen-Bradley 1794-OE12 SER A Flex 12 Point Analog Output Module 1794OE12
Factory Sled AB 1756-IA16I SER A ControlLogix 16 Pt Input Module 1756IA16I
Allen-Bradley 1756-L72 SER B ControlLogix 4MB Controller PLC 1756L72
Allen-Bradley 150-C9NBD SER B SMC-3 Smart Motor Controller Factory Sled
Allen-Bradley 2080-L50E-24QWB SER A Micro850 24 I/O EtherNet/IP Controller
Factory Sled AB 1762-IR4 SER A 4 CH RTD Resistance Input Module 1762IR4
Factory Sled AB 1762-IT4 /A MicroLogix Themocouple/mV Module 1762IT4
Factory Sled AB 1769-IF8 /A CompactLogix 8 Pt Analog Input Module 1769IF8
Allen-Bradley 2711P-T7C22D9P PanelView 7 Graphic Terminal 2711P T7C22D9P
Allen-Bradley 2094-BC07-M05-S SER C Kinetix 6000 Integrated Axis Module
Factory Sled AB 1756-CN2R SER C ControlLogix Communication Module 1756CN2R
Factroy Sled AB 1746-NIO4I SER A SLC 500 Analog Output Module 1746NIO4I
Allen-Bradley 150-F43NBD SMC Flex Smart Motor Controller 150F43NBD
Factory Sled AB 1769-L16ER-BB1B SER B CompactLogix 384KB DI/O Controller
Factory Sled Allen-Bradley AB 1756-IF8I /A 8 Point Analog Input Module
Factory Sled AB 1766-L32BXBA SER C MicroLogix 1400 32 Point Controller
Allen-Bradley 1762-L24AWA MicroLogix 1200 24 Pt Controller Factory Sled
Factory Sled AB 1756-IF8 SER A ControlLogix 8 Point A/I Module 1756IF8
Allen Bradley 20-750-DENC-1 SER A PowerFlex 750 Dual Encoder Option Module
Factory Sled AB 1756-IM16I /A ControlLogix 16 Point Input Module 1756IM16I
Factory Sled AB 1756-OF8 SER A ControlLogix 8Pt Output Module 1756OF8
Allen Bradley 2097-V34PR3-LM SER A Kinetix 350 Servo Driver 2097 V34PR3 LM
Allen-Bradley 1756-M16SE ControlLogix 16-Axis SERCOS Servo Module 1756M16SE
Factory Sled AB 1756-DHRIO /D Controllogix Communication Module 1756DHRIO
Allen Bradley 2198-S130-ERS3 Ser B Kinetix 5700 Single Axis Servo Drive
Factory Sled AB 1756-IF16 SER A ControlLogix 16 Pt Input Module 1756IF16
Factory Sled AB 1763-L16BWA MicroLogix 1100 16 Point Controller 1763L16BWA
Factory Sled AB 1768-L43S /B Compact GuardLogix CPU L43 Safety Processor
Allen-Bradley 2094-BC02-M02-M Kinetix 6200/6500 Integrated Axis Module
Factory Sled AB 1762-L24BWA SER C MicroLogix 1200 24 Point Controller
Factory Sled Allen-Bradley 1766-L32BXBA /C MicroLogix1400 32Pt Controller
Sled Allen-Bradley 1756-L82ES /B ControlLogix 5580 Controller 1756L82ES
Allen-Bradley 1762-OA8 /A MicroLogix 8 Point Digital Output Module 1762OA8