1492-L6-BL板卡船舶半导体工控备件优势经销

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；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，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。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。

以下链接皆有货

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NOV 10241398-001 Proprietary Spool Check Valve 1600269

NOV 10305630-001 LIMIT SWITCH /G1615925 SAVER ASSY BOOM OS 435 CRANE

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NOV 117680-2 Tank Expansion Assembly PRS-41 10357841-001

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NOV 20030959 Solenoid CCSV O’RG’D, LOW PWR,F/COMP CHAMBER FRS 20030959+20

NOV 20030959 Solenoid CCSV O’RG’D, LOW PWR,FCOMP CHAMBER FRS 20030959+20

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NOV 71612 Magnetic Separator Hydraulic Suction HP32/45 Varco Drilling 71612 SKB-

NOV 71612-1 Magnetic Suction Separator

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NOV 718636 Repair Kit 3In 15M T-B Valve Varco 718636 Spare Part Kit 3-15M T-B VL

NOV 7401938 GILMORE 1" SPM VALVE ASSY NC-H NPT SM HAND REPAIR KIT 2532 RK VER003

NOV 7805613 Strainer Filter Twist Handle Self Clean 356414

NOV 7810634 Grab Cylinder Repair Kit 639 99170002

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NOV 92045-1 Bushing Set Elevator Bronzes Guide 920451 MBD1912

NOV 920451 Bushing Set Elevator Bronzes Guide 92045-1 MBG0813

NOV 92045-1 Bushing Set Elevator Bronzes Guide 92045-1 MBGJ2011

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NOV 9910043 Valve Repair Kit For 10500091

NOV ANALOG BRAKE INTERFACE CH000755-00 FOR MODEL PWM CONTROLLER

NOV B10049A-000379 Gauge GHT103A-000379 Rev LN HD Meter 5” ERT 62K Varco 150 TDS

NOV Dreco 26460088 Counter for 96 DNS Crane Sensor

NOV H6E22 Secondary Indicator Complete Assembly MD Totco NOV GA26B-92

NOV Hydralift 213910+71 Numeric Keypad Cyberbase 110086-01 9402886

NOV Integrated Power System IPS 017-006512 IPS Battery Charger

NOV M361000203-1 Hydac 0110 D 003 PHM3I Pall HC9601FDP16H

NOV MD Totco 221145-002 Pressure Transducer 5000 PSI / 221145002

NOV MD Totco 221145-003H Pressure Transducer 10000PSI

NOV MD Totco 40221805-001B2LN Tranducer 1000Psi

NOV MD TOTCO 40223172-004

NOV MD Totco 40224300-004 Level Sensor Vmax (Ui) 30VDC Imax (Ii) 140mA Pi 1W

NOV MD Totco SD06CAM0517CJ16AL1 Wight Indicator B621C-0100 0-10000 40222438-001

Nov Mission 641103338 Gland Assembly 20622A Magnum

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NOV National Oilwell Varco 2506-37AH Waer Pad Assembly 8x6x14 2500S H2506

NOV National Oilwell Varco 661009010A Inboard Bearing Set Assembly Mission 6610

NOV National Oilwell Varco 89453-SP Repair Kit For Lower I-BOP Valve 89453SPH2S

NOV National Oilwell Varco G/1B 0002-1076-62 Duplex Blower Marathon 5K49NN2245Y

NOV National Oilwell Varco G7812050002 Air Control Valve (1)

NOV Ross Hill 0000-6905-90 Hour Meter Non-Reset 120VAC 60Hz 0000690590

NOV Ross Hill K05H1001 DSP Dual Fluid Supply Component REV.A

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NOV Shaffer 7401936 Repair Kit 1In SPM NO EH-Type 10960217-001

NOV Shaffer 7401961 Repair kit 2In SPM NO EH-Type Hand Assemble

NOV Shaffer 9910184 Valve Parts Kit For ¾In Interflow F/10-50021

Nov Varco 1293617 Clevis End Wire Rope for Power Rotating