XBTMEM08

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描述

XBTMEM08
來自接地系統(tǒng)混亂時的干擾:接地是提高電子設備電磁兼容性(EMC)的有效手段之一,正確的接地,既能抑制電磁干擾的影響,又能抑制設備向外發(fā)出干擾;而錯誤的接地,反而會引入嚴重的干擾信號,使DCS系統(tǒng)將無法正常工作。DCS控制系統(tǒng)的地線包括:系統(tǒng)地、屏蔽地、交流地和保護地等。接地系統(tǒng)混亂對DCS系統(tǒng)的干擾主要是各個接地點電位分布不均,不同接地點間存在地電位差,引起接地環(huán)路電流,影響系統(tǒng)正常工作。例如:電纜屏蔽層必須一點接地,如果電纜屏蔽層兩端A、B都接地,就存在地電位差,則有電流流過屏蔽層,當發(fā)生異常狀態(tài)如雷擊時,地線電流將更大。此外,屏蔽層、接地線和大地有可能構成閉合環(huán)路,在變化磁場的作用下,屏蔽層內(nèi)有會出現(xiàn)感應電流,通過屏蔽層與芯線之間的耦合,干擾信號回路。若系統(tǒng)地與其他接地處理混亂,所產(chǎn)生的地環(huán)流就可能在地線上產(chǎn)生不等電位分布,影響DCS內(nèi)邏輯電路和模擬電路的正常工作。DCS工作的邏輯電壓干擾容限較低,邏輯地電位的分布干擾容易影響DCS的邏輯運算和數(shù)據(jù)存貯,造成數(shù)據(jù)混亂、程序跑飛或死機。模擬地電位的分布將導致測量精度下降,引起對信號測控的嚴重失真和誤動作。

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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

Square D – DJA34400E53 3p 400a I-Line LSI NEW TAKEOUT

Digitrip 3001 Cutler Hammer 66D2005G11 DT3001 New

ISSC Honeywell 621 I/O System Complete 621-9934C + ++

BHRC10586NW Receptacle 100A 3ph 4W5P Crouse Hinds 480V

Sick Light Curtain Set AGSE 600-1211 AGSS 600-1111 New

Westinghouse Accutrol 200 40HP 480v VFD DRIVE used

Cincinnati Electrosystems 3045 Operator Interface 5004D

Reliance Rectifier Stack 86466-74RD 230/460V Maxpak

ISSC Honeywell Complete Processor IPC 620-15 620-1537

Arktite Cooper DBR56731 Receptacle Enclosure NOS New

Rosemount Pressure Transmitter 3051S* w/ Flowmeter K5Q4

Rosemount Pressure Transmitter 3051S* w/ Flowmeter B4K5

Rosemount Pressure Transmitter 3051S* w/ Flowmeter 1AK5

Weiss Lenze Frequency Inverter EF3003A 8200 Vector New

ABB DSQC 3HAA3563-AGA/2 Rectifier Module

Appleton AR40034 Receptacle Powertite 400amp 3w4p New

ASCO X8018A4 Explosion Proof Solenoid Valve 125VDC 230W

Computer Cooling Air Conditioner IQ1800VS Ice Qube 120V

VSQ3034 Killark Receptacle 30A 600VAC 20Hp 3W4P Haz Loc

Yaskawa Encoder AC Servo Motor SGMGH-20DCA61 400V 1500R

Custom Servo Motors Servo Drive MPA-07-CLAMP 80-260VAC

Schneider Lexium MHDA1004N00 17 Series Servo Drive New

Honeywell PIC ST3000 Smart Transmitter + Acces. New

SEL Schwietzer SEL-31B Protection Automation System NOS

Russellstoll Plug JPS2034H 200amp 250/600Vac Industrial

Liebert Interceptor Surge Suppression S120N111-01 120V

SY/MAX Square D Programmer 8010 SPR-300 K Terminal

Chromalox Air Duct Heater APH-010 480V 10KW 3ph NOS New

Russellstoll 3144 Receptacle 200Amp 480VAC 250Vac/dc

Toshiba Tosvert-130G3+ Transistor Inverter IGBT VFD New

Siemens 6ES5923-3UA11 Programmable CPU Module,NIB

Ciena Networking Card WDM Receiver PM 2.5G RCVR-1

Toshiba Tosvert-130G2+2?010 Transistor Inverter VFD IGBT

Analog Input Module IPONI 8793C36G01 Eaton NOS New

Rosemount Temperature Probe 0078* 0078P25C30B200F?62E5

Reliance Resistor Braking Module 3575 M3575TH15 NOS New

GE Micro VersaTrip Neutral Sensor TSVG508B 300/800A New

JCS2034E Russellstoll Receptacle 200A 250DC 600AC

Moore Circuit Board Link Face 15853-1-8 New

IBS-PLC5-DSC/I-?T (IBS PLC5 DSC/I-T) Phoenix InterBus

MMK-HI-SS3NTI Surge Supressor Northern Technologies NOS

Adams Otis Elevator Repair Parts Brushes Contacts + Lot

Square D powerlogic product interface 3050 PIF-3

Receptacle 4234BC Russellstoll 30A 480VAC Haz.Duty NOS

Toshiba Tosvert-130G2+4?055 VFD I:460VAC O:.1-80/400Hz

ABB Robotics Cable Assy. 3E 032185 Vert. Arm Extend 2@

Cutler Hammer A0CH6H2493 CPSH2480DESG 480D VAC 3Ph 3W

Astrosystems AstroPLX150 AC30-2 NOS New + manual

Astrosystems AstroSyn180 AS36-1 NOS New + manual

Bray Controls Valve 91-1185-21330-5?32 140 max PSI NOS

Reliance Electric 57C411 resolver input module 57411-2E

ABB SACE PR112/P-A AC Trip Unit Overcurrent release NOS

GE Protective Capacitor 9L18BBB301 0-650VAC 3po thyrite

GE Protective Capacitor 9L15BCC003 0-650VAC 3po Thyrite

KE6A15-W ABB Changeable Withdraw 1SDA048827R1 NOS New

Honeywell Protectorelay Control RA890G1288 Rebuilt CAPP

Kollmorgen Goldline XT MT322A1-R2D1 Servomotor400/4?80V

Joslyn Clark Motor Relay 5DP7-7030-11 75A 500VDC New

GE Fuji Motor Drive AF-300E$ 6KAF34001E$A1 New

Honeywell ST3000 Smart Transmitter w/manual NOS New

AuCom IMS2 Digital Soft Motor Starter 10/20/25Hp NOS

Siemens EPROM ES5525-3UA21 Processor Module

BEI Encoder H25D-F62-SS-360?BCD-7272-SM14/1?9-S New

IQ Data Plus II Westinghouse 2D78522 w/ Power Supply

Reliance Yamacs Synchronous Rectifier SS4415 AC DC New

Opcon Photoelectric Eye Unit 1141D-6501 NOS

AIC TSM27H-30A20-1 Stainless Steel 850W 120V NOS New

Parametrics Probe 301738 PR New NOS

Modicon Power Supply Module AS-B864-001 24VDC P802

Siemens Simatic S5 6E55923-3UA11 Module for PC612

Russellstoll 3348 Plug Industrial 200A 250Vac/dc 4pin

Cutler Hammer Shunt Trip Kit 110/127V 2A11791G01 MST1

Current Transformer 210R-302 3000:5 Square D NOS

Killark RW64C Receptacle 20Amp 3ph 3W 4P 600V Hubbell

Reliance M3675T-H15 Snubber Braking Module for AC drive

Square D HDA36040 3p 600v 40a NEW I-Line PowerPact

3448 Receptacle Russellstoll 200Amp 480VAC/250VAC-D?C

Siemens Simatic Central Interface Module 6ES5300-3AB11

Simatic S5 Siemens 6ES5 455-4UA11 Output Module New

Siemens 6ES5456-4UB12 Digital Output Module NOS

Boston Gear Ratiotrol AC Inverter ACEKL-460V-3P-3?HP New

ST3000 Smart Transmitter Honeywell YSTR12D + PIC W29A2

Omron Output Module C500-OD415CN

DL50 DataLiner Allen Bradley Processor Board 7712881103

Current Transformer 203R-162 1600:5 Square D NOS

Toshiba S5 VFS5-5040UPH Transistor Inverter VFD 3hp NOS

Reliance Heat Sink Thyrister Assembly 78177 1Y

Moore Site Programmable Alarm SPA HLPRG 2PRG/U New

Edwards Adaptabeacon 107DV2CRINHA-N5 120V Industrial

Reliance Rectifier Stack 0-86466060S assy of 0-51378-19

Receptacle Russellstoll DP35CK 30A 600A 50-400Hz T&B

Westinghouse 591C651G02 contact for DS-206 NOS

TECO Speecon 7210Q Q4-0150-314 Variable Speed AC Drive

Honeywell Processor Module 620-1537

Siemens Sonar-Bero Proximity Sensor 3RG6114-3BF00 New

Watlow Process Series 942 Panel Meter 942A-4FD2-D000

ASCO Explosion Proof Solenoid Valve 2063816G 125VDC New

GEC Alsthom KCGG14001D15EEA?Z Overvoltage Relay Module

3020-ECM-RM Square D Ethernet Circuit Monitor 90/264V

Reliance 0-55325-81 circuit board NEW 802289-15A NOS

Reliance 0-57409-D PLC Analog Input Module NOS New

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,福克斯波羅、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。