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。

JRC NKG-52 PRINTER NKG52

Delta ASD-B0721-A AC Servo Drive 750W

Beckhoff KL1904 Bus Terminal 4x Channel Digital Input 24V DC

Honeywell 42009287AP Power Supply Board

Johnson Controls IOM4711 Input Output Module MS-IOM4711-0

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7212-125.0000 (308 Board)

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Fast Corporation Plum-001 P-900155 Rev.1 Frame Brabber PCI Board

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Netstal ASC4 110.240.7945d Card 110.240.7944-B

AB SLC 500 Output Module Cat 1746-OBP16 Ser.C

Toshiba BU664 Base Rack GBU664**S

JRC NVT-181 VDR Microphit

KASUGA-MH KSV Voltage Relay 31-402-3005-00

Beckhoff KL3464 4x Analog Input

Aichi Tokei Denki OF05ZAQ Micro Stream Flow Sensor

Muratec RDSOL 100 Sensor

APD24-24S4.5A Power Supply

Charter Kontron 554-201-000 Rev.B MCU and RS232 Splitter 554-201-100 Rev.B

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STAHL 8562/52-2030-100 Miniature Circuit Breaker 2 Pole

Sensonics E-075/IS 323

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Martin-Decker ASSY PCB290A Rev.AA Transient Protection Current Loop BD. PBO290A

Koyo electronics E-01T-4131 Relay Output ()

MGDS M-840 Card M-840 2

MGDS P 870 Ver.4 Card

OMRON B7AS-R6B16 Link Terminals B7ASR6B16

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ISM MTC-251-1 Isolation Signal Converter

OMRON CS1W-SLK21 SYSMAC LINK IT

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Phytec Broadgate P1742/4 ISS 01 Interface Daughter PCB

Eaton MTL7756ac Safety Barrier 7756ac ()

Pepperl  Fuchs VBA-4E4A-G11-ZAJ/EA2L-V1 AS-I Interface Sensor 221518

National Instruments FP-DO-401 PN. 184438A-01 16-ch Sourcing Discrete Output

Schneider Electric TSXDEY32D2K 32I 24VDC SINK CONN

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Omron CJ1W-V600C12 ID Sensor it CJ1WV600C12 V600C

 Terasaki ECB-321 K/76Z/1-001 C PC Board Assembly 22 Contact

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ACCU-SORT 22 Series II Laar code Scanner 78-8129-2497-1 AS

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Omron CQM1-CPU41-V1 Programmable Controller CQM1-CPU41-EV1 CPU it

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