SMP-E136

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描述

SMP-E136
安全接地即將高壓設備的外殼與大地連接。一是防止機殼上積累電荷,產(chǎn)生靜電放電而危及設備和人身安全,例如電腦機箱的接地,油罐車那根拖在地上的尾巴,都是為了使積聚在一起的電荷釋放,防止出現(xiàn)事故;二是當設備的絕緣損壞而使機殼帶電時,促使電源的保護動作而切斷電源,以便保護工作人員的安全,例如電冰箱、電飯煲的外殼。三是可以屏蔽設備巨大的電場,起到保護作用,例如民用變壓器的防護欄。當電力電子設備遇雷擊時,不論是直接雷擊還是感應雷擊,如果缺乏相應的保護,電力電子設備都將受到很大損害甚至報廢。為防止雷擊,我們一般在高處(例如屋頂、煙囪頂部)設置避雷針與大地相連,以防雷擊時危及設備和人員安全。安全接地與防雷接地都是為了給電子電力設備或者人員提供安全的防護措施,用來保護設備及人員的安全。?工作接地是為電路正常工作而提供的一個基準電位。這個基準電位一般設定為零。該基準電位可以設為電路系統(tǒng)中的某一點、某一段或某一塊等。當該基準電位不與大地連接時,視為相對的零電位。但這種相對的零電位是不穩(wěn)定的,它會隨著外界電磁場的變化而變化,使系統(tǒng)的參數(shù)發(fā)生變化,從而導致電路系統(tǒng)工作不穩(wěn)定。當該基準電位與大地連接時,基準電位視為大地的零電位,而不會隨著外界電磁場的變化而變化。但是不合理的工作接地反而會增加電路的干擾。比如接地點不正確引起的干擾,電子設備的共同端沒有正確連接而產(chǎn)生的干擾。為了有效控制電路在工作中產(chǎn)生各種干擾,使之能符合電磁兼容原則。我們在設計電路時,根據(jù)電路的性質(zhì),可以將工作接地分以下為不同的種類,比如直流地、交流地、數(shù)字地、模擬地、信號地、功率地、電源地等。不同的接地應當分別設置。不要在一個電路里面將它們混合設在一起,例如數(shù)字地和模擬地就不能共一根地線,否則兩種電路將產(chǎn)生非常強大的干擾,使電路陷入癱瘓!

產(chǎn)品承諾:
保?證?全新原裝進口,
保?證?安全準時發(fā)貨,
保?證售后服務質(zhì)量,
優(yōu)勢價格,大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌:ABB???,AB??,GE,FOXBORO,本特利,英維思,伍德沃德,西屋,瑞恩,施耐德,西門子,摩托羅拉,安川。力士樂。ACSO,橫河等進口品牌。 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
? 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家

Tektronix P3420 Variable Output Pod

Agilent E4887A-102 HDMI Cable Emulator

Table Top RF Test Chamber

HP4947A Transmission Impairment Measuring Set

Tektronix MTS300 MPEG Test System w/op LV-AS

Tektronix DG2020A Data Generator

Tektronix DG2030 Data Generator

Sencore VG91 Universal Video Generator

Wandel And Goltermann ANT-20 Advanced Network Tester

Tektronix TLA 602 Logic Analyzer w/opt 4S

HP/Agilent 8643A Synthesized Signal Generator/opt 001

HP/Agilent 8568B Spectrum Analyzer

Agilent HP8643A Synthesized Signal Generator 1030Mhz

JFW 50BR-008 Benchtop Attenuator

TTC 30609 Framing Interface Adapter

HP/Agilent 3708A Noise and Interference Test set

Ranger Intelliscan 18-Zone Walk through Metal Detector

Agilent-HP 4275A Multi-Frequency LCR Meter opt-001,004

PTS Frequency Synthesizer 0.1-160MHz

Programmed Test Sources Frequency Synthesizer 1-500 MHz

Boonton 56218-S1 Dual Diode Power Sensor

Agilent HP8760A KE4 Dynamic Range Extender

HP 3708A Noise & Interference Test Set

Panasonic VP-8193A Signal Generator

Kikusui Electronics Corp. PLZ300W Electronic Load

Giga-tronics 80401A Power Sensor 0.01-18 GHz

Hewlett Packard 87104A SP4T Coaxial Switch

Agilent/Hewlett Packard 87104B SP4T Coaxiial Switch

VWR Scientific 1350F Oven

HP 54120A Digitizing O’scope and HP 54121A 4 Channel

Tektronix AM503 Current Probe Amp & A6303 Current Probe

Linear Positioner LS-612/06031 30mm Travel

Chuo Seiki LS-612 06031 Linear Positioner 30mm travel

Chuo Seiki Linear Positioner LS-912 06033 60mm

LS-912 06033 Linear Positioner/Prec?ision Slide

Chuo Seiki LS-912 06033 Linear Positioner 60MM travel

Hewlett Packard 778D Dual Directional Coupler

Amprobe AM-16 Multimeter

Agilent E4432B ESG-D Signal Generator 250kHz-3.0GHz

Anritsu SC6287 Demo Kit

VWR Scientific 1147 Refrigerated Bath Circulator

HP 2225A Injet Printer with HPIB Port

HP 1661C Logic Analyzer

Giga-tronics 80401A Power Sensor

Agilent/Hewlett Packard 8754A Network Analyzer

Bruel Type 2706 Power Amplifier

Hewlett Packard 8656B Signal Generator

Tektronix 7904A Oscilloscope

Agilent 6651A 400W DC Power Supply 0-8V 0-50A

HP 16047A Test Fixture

US G2 MainFrame w/6each G2R14 1×6 RF Relays

Tektronix P6022 Termination + AC Current Probe

Noise/Com MP2700-6 Multipath Fading Emulator

DowKey 5010 Cellular Receiver Test System

Agilent/HP E8285A CDMA Mobile Station Test Set

Agilent/Hewlett Packard 8904A Multifunction Synthesizer

Agilent/Hewlett Packard 54620A Logic Analyzer

Satimo SAT 2001 Probe Array Controller

Satimo SAT 2021 Active Measurement Test Unit

Satimo SAT 2013 RF Unit

Agilent/Hewlett Packard 778D Dual Directional Coupler

Meca 722N-20-3.100 Dual Directional Coupler

HP 8495A Programmable Attenuator /70dB

EXFO FIP-S15 Handheld Display w/P5 Inspection Probe

Tektronix 11403 Digitizing Oscilloscope

Magna Flux ZB-100 Black light

Federal Products Corp EAS-2350 N/A

Met One 200-1-115-2 Clean Room Monitor

Spectroline PR-125T UltraViolet Eprom Eraser

Xantrex Model XTS 120-0.5 M2 Power Supply

Kepco BOP 20-5M Bipolar OpAmp Supply

Xantrex XTS 120-0.5 GPIB M3 Power Supply

Xantrex XTS 60-1 GPIB Power Supply

Glassman Europe XM20-3MAA Programmable DC Power Supply

Sorensen XTS 7-6 M9B M13 Programmable DC Power Supply

SRT FPD-W Plus BGA Re-Work Station

Air-Vac DRS-22 Hot Air Re-work station

Tektronix P6015A 75Mhz High-Voltage Probe

Agilent/Hewlett Packard 8753B 6Ghz Network Analyzer

Radyne Comstream DM240 Digital Modulator

Tektronix TLA 704 Logic Analyzer

PMC 720 Series 10″ Dataplate Digital Hot Plate/Stirrer

Olympus NEO Splan 100 Objective

Olympus NEO SPlan 20 Objective

Olympus NEO SPlan 50 Objective

Mitutoyo QV 2.5x Objective

Mitutoyo QV 5x Objective

Trilithick BMA-580 Attenuator

Agilent 8761B SPDT RF Switch w/opt 000

Agilent/Hewlett Packard 8761B SPDT RF Switch

LeCroy CATC 5K Protocal Analyzer w/UWB Analyzer

Greenlee 299 9-Pin D-Subminiature Panel Punch

Greenlee RS232 25-Pin D-Subminiature Panel Punch

Greenlee 234 37-Pin D-Subminiature Panel Punch

Rohde and Schwarz FSP 3 Spectrum Analyzer

FOI-150 Fiber Optic Light Source w/ring light

HP 8762A Coaxial Switch

Agilent/HP 8762B Coaxial Switch

WSI 19 inch Single Bay Mobile Test Rack

Continental – Superterm 8 Intelligent Controller

Agilent Triple Output DC Power Supply E3631A

Agilent E3631A Triple Out put DC Power Supply

Kepco BOP 20-5M Power Supply/Amplifie?r

HP 8494G Programmable Attenuator 11dB

HP 8496G 110 dB Attenuator

Bransononic 3510 Table Top Ultrasonic Cleaner

Agilent 8763B Coaxial Switch

Standard SCM550HP NTSC TV Modulator

Tektronix P6137 Passive Voltage Probe for 2400 Series

Blonder Tongue oc16 Passive Combiner

HP 11636A Power Divider, DC to 18 GHz

Miyachi Unitek TCW/1-196-03 Thermocouple Welder-TCW

Miyachi Unitek DC25 Welding Control w/No. 80 Weld Head

Narda 3020A Bi-Directional Coaxial Coupler

Narda 4226-20 Directional Coupler

Narda 4226-10 Directional Coupler

ROD-L M25 Ground Continuity Tester

Ophir 4003F RF Power Amplifier

Agilent/Hewlett Packard 87130A Attenuator/Swit?ch Driver

M/A-Com MPD EWAL 4010-12 Solid State Amplifier 80W

Stereo Zoom 4 Microscope B&L

Stereo Zoom 4 Microscope 0.7x-3.0x Bausch&Lomb

Bausch & Lomb Stereo Zoom 4 Microscope

Bausch and Lomb Stereo Zoom 4 Microscope

Agilent 33120A 15MHz Waveform Generator

Agilent/Hewlett Packard 34401A 6 1/2 Digit Multimeter

Quadchek II 7564SA Electrical Safety Analyzer

California Instruments 5001 i 5KvA AC Power Source

Hewlett Packard 3588A Spectrum Analyzer

100 Watt Attenuator SA3N100-30F 30db 3Ghz

SA3N100-30F 100 Watt Attenuator

S.M. Electronics SA3N100-30F 100 Watt Attenuator

Agilent VXI Mainframe E8403A w/6 modules

Agilent/Hewlett Packard 773D Directional Coupler

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Agilent N5102A Digital Signal Interface Module

Sigma II Sigma Memory Tester w/ memory adapter

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DSI Sigma II Sigma Memory Tester

PLC模塊,可編程控制器,CPU模塊,IO模塊,AI模塊,通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅

15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家


選擇深圳長欣,選擇放心,售后無憂大量現(xiàn)貨,當天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點經(jīng)驗。
1、先通讀一遍“系統(tǒng)手冊”(不管能不能看懂,先了解個大概,以便學習編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(shù)等條件,把或、與、非關(guān)系理順;
3、進而練習整數(shù)運算、實數(shù)運算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個物理回路驗證,比如變頻器+電機+測速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學會一種至于其它的學習起來也就簡單了。