GB/T 7424.4-2003 光缆 第4-1部分：分规范 光纤复合架空地线
作者:标准资料网 时间:2024-05-09 13:57:59 浏览:8557
来源:标准资料网
基本信息
| 标准名称： | 光缆 第4-1部分：分规范 光纤复合架空地线 |
| 英文名称： | Optical fibre cables—Part 4:Section specification—Optical fibre composite overhead ground wire |
| 中标分类： |
通信、广播 >>
通信设备 >>
光通信设备 |
| ICS分类： |
电信、音频和视频技术 >>
光纤通信 >>
光纤和光缆
|
| 发布部门： | 中华人民共和国国家质量监督检验检疫总局 |
| 发布日期： | 2003-11-24 |
| 实施日期： | 2004-08-01 |
| 首发日期： | 2003-11-24 |
| 作废日期： | 1900-01-01 |
| 主管部门： | 信息产业部（电子） |
| 提出单位： | 中华人民共和国信息产业部 |
| 归口单位： | 中国电子技术标准化研究所 |
| 起草单位： | 信息产业部电子第八研究所 |
| 起草人： | 杨可贵、胡红军、徐乃管、黄俊华 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2004-03-01 |
| 页数： | 平装16开， 页数：23， 字数：49千字 |
| 书号： | 155066.1-20552 |
适用范围
GB/T 7424的本部分规定了光纤复合架地线（OPGW）的产品型号、结构、性能特性、试验方法、检验规则和包装、标志要求。GB/T 7424的本部分适用于沿高压输电线杆塔布放的光纤复合架空地线（OPGW）。
前言
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目录
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引用标准
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所属分类： 通信 广播 通信设备 光通信设备 电信 音频和视频技术 光纤通信 光纤和光缆
Product Code:SAE ARP743
Title:Procedure for the Determination of Particulate Contamination of Air in Dust Controlled Spaces By the Particle Count Method
Issuing Committee:A-6c1 Contamination And Filtration Committee
Scope:this SAE Aerospace Recommended Practice (ARP) describes two procedures for sampling particles in dust controlled spaces. One procedure covers airborne dust above 5 碌m. The other (and newly added procedure) covers particles of 25 碌m and larger that "fall out" of the environment onto surfaces. In each case the particles are sized in the longest dimension and counted. Airborne particles are reported as particles per cubic meter (cubic foot) whereas particles collected in fall out samples are reported as particles per 0.1 square meter (square foot). This document includes English units in parentheses as referenced information to the SI units where meaningful.These procedures may also be used for environmental analysis where the quality of the particles by visual or chemical analysis is intended.【英文标准名称】:Industrialcommunicationnetworks-Fieldbusspecifications-Part5-17:Applicationlayerservicedefinition-Type17elements(IEC61158-5-17:2007);EnglishversionEN61158-5-17:2008,onlyonCD-ROM
【原文标准名称】:工业通讯网络.现场总线规范.第5-17部分:应用层设备定义.17型元件.仅为CD-ROM
【标准号】:DINEN61158-5-17-2008
【标准状态】:现行
【国别】:德国
【发布日期】:2008-09
【实施或试行日期】:2008-09-01
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:应用层;应用;总线系统;总线;电路网络;通信;计算机应用;计算机控制;控制;控制设备;控制系统;控制工艺学;数据总线;数据通信;数据交换;数据传输线;数据连接系统;数据网络;数据处理;数据设备;数据传送;数据传输控制规程;定义;数字的;数字数据;数字工程;电子数据处理;电气工程;电子仪器;电子系统;英语;现场总线;制导系统;工业的;工业设施;信息交换;信息处理;信息技术;接口(数据处理);开放系统互连;操作技术;OSI;物理层;过程控制工程;设备;规范;规范(验收);传输媒质
【英文主题词】:Applicationlayer;Applications;Bussystems;Buses(dataprocessing);Circuitnetworks;Communication;Computerapplications;Computerizedcontrol;Control;Controlequipment;Controlsystems;Controltechnology;Databus;Datacommunication;Dataexchange;Dataline;Datalinksystem;Datanetwork;Dataprocessing;Dataservices;Datatransfer;Datatransmissioncontrolprocedures;Definition;Definitions;Digital;Digitaldata;Digitalengineering;EDP;Electricalengineering;Electronicinstruments;Electronicsystems;Englishlanguage;Fieldbus;Guidancesystems;Industrial;Industrialfacilities;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces(dataprocessing);Opensystemsinterconnection;Operationaltechniques;OSI;Physicallayers;Processcontrolengineering;Services;Specification;Specification(approval);Transmissionmedia
【摘要】:Thisstandardprovidescommonelementsforbasictime-criticalandnon-time-criticalmessagingcommunicationsbetweenapplicationprogramsinanautomationenvironmentandmaterialspecifictoType17fieldbus.Theterm“time-critical”isusedtorepresentthepresenceofatime-window,withinwhichoneormorespecifiedactionsarerequiredtobecompletedwithsomedefinedlevelofcertainty.Failuretocompletespecifiedactionswithinthetimewindowrisksfailureoftheapplicationsrequestingtheactions,withattendantrisktoequipment,plantandpossiblyhumanlife.ThisstandarddefinesinanabstractwaytheexternallyvisibleserviceprovidedbythedifferentTypesofthefieldbusApplicationLayerintermsofa)anabstractmodelfordefiningapplicationresources(objects)capableofbeingmanipulatedbyusersviatheuseoftheFALservice,b)theprimitiveactionsandeventsoftheservice;c)theparametersassociatedwitheachprimitiveactionandevent,andtheformwhichtheytake;andd)theinterrelationshipbetweentheseactionsandevents,andtheirvalidsequences.Thepurposeofthisstandardistodefinetheservicesprovidedto1)theFALuserattheboundarybetweentheuserandtheApplicationLayeroftheFieldbusReferenceModel,and2)SystemsManagementattheboundarybetweentheApplicationLayerandSystemsManagementoftheFieldbusReferenceModel.ThisstandardspecifiesthestructureandservicesoftheIECfieldbusApplicationLayer,inconformancewiththeOSIBasicReferenceModel(ISO/IEC7498)andtheOSIApplicationLayerStructure(ISO/IEC9545).Theprincipalobjectiveofthisstandardistospecifythecharacteristicsofconceptualapplicationlayerservicessuitablefortime-criticalcommunications,andthussupplementtheOSIBasicReferenceModelinguidingthedevelopmentofapplicationlayerprotocolsfortime-criticalcommunications.Asecondaryobjectiveistoprovidemigrationpathsfrompreviously-existingindustrialcommunicationsprotocols.ItisthislatterobjectivewhichgivesrisetothediversityofservicesstandardizedasthevarioustypesofIEC61158.ThisspecificationmaybeusedasthebasisforformalApplicationProgramming-Interfaces.Nevertheless,itisnotaformalprogramminginterface,andanysuchinterfacewillneedtoaddressimplementationissuesnotcoveredbythisspecification,includinga)thesizesandoctetorderingofvariousmulti-octetserviceparameters,andb)thecorrelationofpairedrequestandconfirm,orindicationandresponse,primitives.
【中国标准分类号】:N18;P76
【国际标准分类号】:35_100_70;35_160
【页数】:59P.;A4
【正文语种】:英语
