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A20B-1000-0323現(xiàn)貨 in stock! 歡迎來電咨詢~?。?

A20B-1000-0323,

A20B-1000-0323

一般工業(yè)控制系統(tǒng)既包括弱電控制部分，又包括強電控制部分。為了使兩者之間既保持控制信號，又要隔絕電氣方面的，即實行弱電和強電隔離，是保證系統(tǒng)工作穩(wěn)定，設(shè)備與操作人員安全的重要措施。

　　電氣隔離目的之一是從電路上把干擾源和易干擾的部分隔離開來，從而達(dá)到隔離現(xiàn)場干擾的目的。

　　一、信號隔離

　　信號的隔離目的之一是把引進的干擾通道切斷，使測控裝置與現(xiàn)場僅保持信號，不直接發(fā)生電的。工控裝置與現(xiàn)場信號之間常用的隔離方式有光電隔離、脈沖變壓器隔離、繼電器隔離和布線隔離等。

　　1.光電隔離

　　光電隔離是由光電耦合器件來完成的。其輸入端配置發(fā)光源，輸出端配置受光器，因而輸入和輸出在電氣上是完全隔離的。由于光電耦合器的輸入阻抗(100Ω～1kΩ)與一般干擾源的阻抗(105～106Ω)相比較小，因此分壓在光電耦合器的輸入端的干擾電壓較小，它所能提供的電流并不大，不易使半導(dǎo)體二極管發(fā)光。另外光電耦合器的隔離電阻很大(約1012Ω)、隔離電容很小(約幾個pF)，所以能阻止電路性耦合產(chǎn)生的電磁干擾，被控設(shè)備的各種干擾很難反饋到輸入系統(tǒng)。

　　光電耦合器把輸入信號與內(nèi)部電路隔離開來，或者是把內(nèi)部輸出信號與外部電路隔離開來，如圖1所示。開關(guān)量輸入電路接入光電耦合器后，由于光電耦合器的隔離作用，使夾雜在輸入開關(guān)量中的各種干擾脈沖都被擋在輸入回路的一側(cè)。由于光電耦合器不是將輸入側(cè)和輸出側(cè)的電信號進行直接耦合，而是以光為媒介進行耦合，具有較高的電氣隔離和抗干擾能力。

　　目前，大多數(shù)光電耦合器件的隔離電壓都在2.5kV以上，有些器件達(dá)到了8kV，既有高壓大電流大功率光電耦合器件，又有高速高頻光電耦合器件(頻率高達(dá)10MHz)。常用的器件如4N25，其隔離電壓為5.3kV；6N137，其隔離電壓為3kV，頻率在10MHz以上。

　　2.脈沖變壓器隔離

　　脈沖變壓器的匝數(shù)較少，而且一次繞組和二次繞組分別繞于鐵氧體磁芯的兩側(cè)，這種工藝使得它的分布電容特小，僅為幾個pF，所以可作為脈沖信號的隔離元件。脈沖變壓器傳遞輸入、輸出脈沖信號時，不傳遞直流分量，PLC使用的數(shù)字量信號輸入/輸出的控制設(shè)備不要求傳遞直流分量，因而在工控系統(tǒng)中得到了廣泛的應(yīng)用。

　　圖2是脈沖變壓器的應(yīng)用實例。電路的外部信號經(jīng)RC濾波電路和雙向穩(wěn)壓管抑制常模噪聲干擾，然后輸入脈沖

　　變壓器的一次側(cè)。為了防止過高的對稱信號擊穿電路元件，脈沖變壓器的二次側(cè)輸出電壓被穩(wěn)壓管限幅后進入測控系統(tǒng)內(nèi)部。一般地說，脈沖變壓器的信號傳遞頻率在1kHz～1MHz之間，新型的高頻脈沖變壓器的傳遞頻率可達(dá)到10MHz。

　　3.繼電器隔離

　　繼電器的線圈和觸點沒有電氣上的，因此，可利用繼電器的線圈接受信號，利用觸點發(fā)送和輸出控制信號，從而避免強電和弱電信號之間的直接接觸，實現(xiàn)了抗干擾隔離。

　　圖3是繼電器輸出隔離的實例示意圖。在該電路中，通過繼電器把低壓直流與高壓交流隔離開來，使高壓交流側(cè)的干擾無法進入低壓直流側(cè)。

　　4.布線隔離

　　將微弱信號電路與易產(chǎn)生噪聲污染的電路分開布線，zui基本的要求是信號線路必須和強電控制線路、電源線路分開走線，而且相互間要保持一定的距離。配線時應(yīng)區(qū)別分開交流線、直流穩(wěn)壓電源線、數(shù)字信號線、模擬信號線、感性負(fù)載驅(qū)動線等。配線間隔越大，配線越短，則噪聲影響越小。但是，實際設(shè)備的內(nèi)外空間是有限的，配線間隔不可能太大，只要能維持zui低限度的間隔距離便可。

　　附表列出了信號線和動力線之間應(yīng)保持的zui小間距。如果受環(huán)境條件的限制，信號線不能與高壓線和動力線等離得足夠遠(yuǎn)時，就得采用諸如信號線路接電容器等各種抑制電磁感應(yīng)噪聲的措施。

上億庫存，國內(nèi)外近千個倉庫，公司部分產(chǎn)品型號如下，歡迎聯(lián)系哦~！

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Support 9358-BPC30R SUPT REINSTATEMENT CONTRACT FOR 9358BPC30ENE

Support F1785-L20C15SERC FIRMWARE UPGRADE FOR 1785-L20C15 PLC5 PROCESSOR MO

RSI Software Products 9301-2SE2500U4R UPGRADE: OUT-SUPT: RSVIEW32 WORKS 150 TO 100K

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TRM-21006666 14 point connector for S2K digital I/O connector TB2

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140ACO13000C Quantum 模擬量輸出, 8通道, 高密度, CC

284E-FVD7P6Z-25-CR-OC EtherNet Variable Frequency Drive

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150-C16NCD SMC-3 16A Smart Motor Controller

1608P-100A400V4S 100 A Pro DySC Sag Corrector

1769-SDN CompactLogix DeviceNet Scanner Module

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SLC/1746 System 9399-CCAUG CONTROLGUARDIAN ARCHIVER5 USERS GUIDE

Open Automation Systems 1789-STRT1 SOFTLOGIX 5800 STARTER KIT ENGLISH

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Support 9381-P15KENR SUPT REINSTATEMENT CONTRACT FOR 9381P15KEN

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RSI Software Products 9301-2SE3300FRU2 RSVIEW32 RUNTIME 150-1500 UPGRADE IN-SUPT (FR)

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Motion Control MPL-B4540F-MJ24AA MOTOR,SERVO,10.2 NM,3000RPM,MULTI,460V,BRK,13KG

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22-RF034-CL PowerFlex EMC Filter Kit

2711P-RN15S PV Plus 700 to 1500 CNet Comms Module

281A-F12Z-10C-RRW-3FR ArmorStart Direct Online RVSG Starter

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1497-C-BASX-0-N Control Circuit Transber

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194L-G2830 194L 44 mm Plastic Operating Shaft

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GC647PCMSCH GlobalCare Complete for Proficy Change Management Scheduler

IC200MDL329 Output 120VAC 0.5 amp per point isolated 8 points

IC646NWS999 CIMPLICITY ThinView for Windows CE

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Operator Interface 2711-B5A15 PV550 MONO KEY&TOUCH, CNET & RS232 PRINT

Support 9303-23S0E20R SUPPORT REINSTATEMENT CONTRACT FOR 9303-23S0E20

Support 9371-EJTI3S SUPT RENEWAL CONTRACT FOR 9371EJTI3

ControlNet Products 9355-WABCENE RSLINX C SDK FOR ALLEN-BRADLEY, CD

RSI Software Products 9301-2SE2500ESU1 RSVIEW32 WORKS 32K-100K UPGRADE IN-SUPT (ES)

RSI Software Products 9358-BANT30U2 UPGRADE: IN-SUPT: RSBATCH ARCHIVER 10 TO 30

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IC641CTL931 CIMPLICITY Control 90-30 Programmer with Paper Documentation Library

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MPT002-G4R-V1 單色LCD 160*64 四行帶RS232端口

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1494V-DSX400 Disconnect Switch

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1585J-L8HBJM-10 RJ45 Ethernet Media

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GC647ARC999 GC Reporting Client UNL

IC200ACC001 Replacement battery for VersaMax Modular CPU. Includes battery and holder.

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IC660HHM501RR Hand Held Monitor Ph B

IC697ACC821 DIN Rail Transition Module 64 Pin for IC697Vxxxxx modules

IC756XRT000 DataViews Runtime for Inb x386 Unix

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GuardPLC Systems 1753-L32BBBM8A GUARDPLC 1800 - SAFETY PLC W/ MODBUS, 32 I/O

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Support 6626-PMCS COMMUNICATION SOFTWARE RENEWAL

Support 1771-PCBR CONTROL COPROCESSOR SOFTWARE REINSTATEMENT

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RSI Software Products 9301-2SE2350ESU3 RSVIEW32 WORKS 1500-5K UPGRADE IN-SUPT (ES)

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194E-AA00E-P11-PE 194E Load switch

2071-AP2 Kinetix 3 200W Component Servo Drive

2090-CSWM1DF-14AA03 Kinetix Cable Single DSL 2090-Series

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IC647HSTMK030 Historian Media Kit v3.0

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IC694MDL654CA Conbal Coated Input module 32 points 5/12VDC TTL POS/NEG logic. Termi nation is a Fujitsu connector.

IC756WDC009E-99 DV Development Sys VB, Java, C++, English, Version 9.9

MicroLogix 1500/1769 System 1761-NET-DNI DEVICENET INTERFACE (DNI)

PLC-5/1771 System 1784-CP7 ADAPTER, CP/CP5 TO PLC-5 (DIN)

Distributed I/O 1797-TPS CONTROLNET EX T-TAP STRAIGHT

Communications D9220-6.5.1 DEVELOPERS GUIDE-CONTROL

Support 9321-L5250R SUPT REINSTATEMENT CONTRACT FOR 9321L5250

Support 9358-HSTATHS SUPT RENEWAL CONTRACT FOR 9358HSTATH

Support F1772-LI FIRMWARE UPGRADE FOR 1772-LI PLC2 PROCESSOR MODULE

RSI Software Products 9324-RLD300ENE RSLOGIX 5000 STANDARD, ENG

RSI Software Products 9304-WVPD300DU3R UPGRADE: OUT-SUPT: WINVW 128 TO WINVW PRO DEV 3000

RSI Software Products 9358-PLTM2600U1 UPGRADE: IN-SUPT: PLANTMETRICS 5 TO 200 WORKCELL

Motion Control 8720SM-075-S6SAS2 75 KW/137 AMP, 750VDC, AC MOTOR WITH SRM60 ENC.

A06B-0034-B175#7008 B6/2000 Servo Motor, Holding Brake, 32K Serial Encoder

IC200UAA003 14 point (8) AC In, (6) AC Out, AC Power Supply

IC752BCL000 Download cable for DataPanel 150/160/240E

MTR-1350-E-D-E-SRR Stepping Motor Nema34 Encoder Splashproof

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25-JBAA PowerFlex 520 Frame A NEMA/UL Type 1 Kit

140XCP51000 Quantum 空槽模塊, 帶懸掛門

FRN15F1S-4C 22KVA 30 A 15 KW 3相AC380V/50Hz/60Hz

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1492-SPM3C130-N MCB Supplementary Protector 13 A

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150-SB3NBD SMC-50 SOLID STATE MOTOR CONTROLLER 140A

1734-RTB3 POINT I/O Accessory

1783-MS10T Stratix 8000 10 Port Managed Switch

193-ESM-IG-30A-P E300/E200 30 Amp Sensing Module

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2090-CPWM7DF-14AF40 MP-Series 40 m Length Power Cable

2098-DSD-HV150X Ultra 3000 Servo Drive

GA647IFCLNTCRO001 GCA iFIX iClient Read Only 5 PK Keyless Runtime Version

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IC5005KAX0020 PanelPC Workstation 15 inch with Windows XP

IC647HSTAE250KM Alarm and Events Option for Historian - Standard Server 250000 Points (M4 Key)

IC647SQDM SQD:Square D SY/MAX

IC693MDL734CA Conbal Coated Output module 125VDC, 1amp, 6 point, isolated per point

IC756HDV010CT-99 DV Draw Development on HP/UX Op Sys, Traditional Chinese, Version 9.9

Pico Controllers 1760-L12BWB 12 I/O PICO CONTROLLER W/ RTC, DC

PLC-5/1771 System 1771-INGA50 1771 DISCRETE I/O BACKPLANE INTERFACE ASIC

Distributed I/O 1791D-8B8P DNET 24VDC CBLOCK I/O,8 IN SINK 8 OUT SOURCE, BASE

Communications 1784-PCMC1 PCMCIA 1784-PCMK CARD W/1784-PCM6

Operator Interface 2706-P72CN2 INVIEW MESSAGE DISPLAY. 1 TO 4 LINE

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Support 9515-RSMSVRR SUPT REINSTATEMENT CONTRACT FOR 9515RSMSVRENE

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RSI Software Products 9301-2SE340DEU3R RSVIEW32 RUNTIME 150-32K UPGRADE OUT-SUPT (DE)

RSI Software Products 9356-PRO2200U5R UPGRADE: OUT-SUPT: RSSQL PROF.150 TO 300 TAG

Motion Control 1326AB-B720F-M2K7L MOTOR,SERVO,460V,31.8NM,5000RPM,MULTI,BRK,IP67

4161-6-5-N12 BCD TO 7 SEG DISPLAY. 6 DIGIT. 5 VDC. NEMA 12

HMI-CCT-405 Backlight for the 12.1" Color TFT (QPLCxxE0000)

IC693CPU331 CPU 331 Module (16K Bytes)

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TRM-21006680 9 point screw terminal AC power connector for IMC-105 stepper controller

20BD011A0AYNANC0 PowerFlex 700 AC Drive 20B

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22B-E9P9F104 PowerFlex 40 5.5 kW (7.5 Hp) AC Drive

140HLI34000C Quantum 高速鎖存/計數(shù)模塊,24 VDC, CC

284G-FVD4P0D-10-RRG-CBG-DB1-EMI ArmorStart 284 Controller

E2Q-N25ME3-G 25mm,電感式,一常開/閉 200mA NPN電源:12-24VDC方40×40

1492-SPM1C500-N MCB Supplementary Protector 50 A

通用型變頻器 6SE6 440-2UC21-1BA1 "1.1 KW,149 x 202 x 172"

電機啟動器 3VU13402MN00

150-C25FBD-8L Encl. SMC-3 25 A Smart Motor Controller

1609-B600N Bul 1609 AC to AC UPS 360W Power Supply

1770-SC DATA HWY STATION CONN

193-EC1CD E3 5-25 A Overload Relay

194R-TL5 194R 400 Amp Multi-tap Terminal Lugs

2090-CPBM7E7-10AF12 MP-Series 12 m Length Cable

2093-AMP1 Kinetix 2000 Axis Module

CP6B-0WPB-0140-AZ Power cable for B22/2000is motor. 14 meters

GF-AU2.5V Connecting FlashCable to Analog Unipolar +2.5 V (No connector).

IC200UEX015 14 point Exp (8) 12VDC In, (6)12VDC Out, 12VDC Power Supply (includes IC200CBL501)

IC647AEC005 PA Efficiency Client 5 Pak

IC647PCM100 Proficy Change Management Server - 100 Concurrent Users

IC693CBL331 Cable, Left Side, Two - 24 Pin 90 Degree Connectors, 2 Meter

IC754CBF12CTD Control 64MB/64MB 12in Color TFT Blank