51304453-100
价格:999.00
【霍尼韦尔51304453-100】电话:18506919598,***:312782195本产品网址:http:///b2b/lujun888/sell/itemid-ml厦门莫格电气自动化有限公司<<***>><<诚信>><<创新>><<合作>><<共赢>>的经营理念《《不断开发新产品》》《《为客户提供优质服务》》《《以***大限度追求客户满意》》《《并不断开拓新领域业务》》Allen-Bradley(美国AB)系列产品Schneider(施耐德电气)系列产品Generalelectric(通用电气)系列产品Westinghouse(美国西屋)系列产品SIEMENS(西门子系列产品------------------------------------------------------------------------------------根据开发维护实践,DCS系统的安全从不外乎两个方面:软件和硬件。从软件上看,主要包括系统软件、组态及开发的应用软件。由于现在常见的DCS系统如HONEYWELL、YOKOGAWA、FOXBORO、ABB、FISHER_RO***ENT等公司在系统软件开发方面已经相当成熟,其对应的组态软件也提供了完善的检验功能,***可能存在问题的是使用系统提供的开发语言或工具(如梯形图、CL语言、TCL语言等)编制的顺序程序、联锁程序或其他应用程序。这部分问题的解决只要在测试时进行严格检查一般不会存在问题。在这里,着重对硬件可能存在的安全问题进行以下分析和探讨:一般说来,DCS系统的安全可以分三个方面(或阶段)来考虑:1设计方面安全2集成方面安全3维护方面安全1设计安全:是指在设计部门和供应商进行系统初始配置时的硬件及环境设计考虑这是整个DCS系统安全的关键所在,将直接影响到以下两个安全因素和未来DCS系统的正常运行。这其中包括:⑴环境设计:如DCS的操作室和机柜室的布局、地面样式或地板选择、墙壁类型、照明方式、地磁电磁干扰、隔断选择、隔音效果、空气洁净度保证、恒温、恒湿及通风设计等,这其中应该着重强调的是恒温及通风设计。我们认为,在保证DCS系统硬件环境温度在23&plu***n;2℃的基础上,可以尽量避免选择集中式空调或恒温恒湿空调,以节约资金并减少空调维护难度。保证通风能力的原因是在满足机房空气洁净度要求的基础上进行新鲜空气的补充,避免操作室内空气浑浊,影响操作维护人员安全,比较典型的设计可以考虑分体式空调加过滤换风机的配置方案。另外,分体式空调的选择也很关键,应选用进口或国产***产品并双机运行。当然,在资金允许的情况下,选择质量可靠的集中空调也未尝不可。但必须注意两个问题:一是空调出入风道的设计位置在考虑调节效果的基础上应避面正对机柜,防止夏天冷凝水滴落到顶部开孔的机柜内部而带来设问题;二是由于机柜室有诸多热源,应考虑机柜室与操作室的供冷供热的平衡问题。⑵供电及电源设计:UPS的选择:应根据DCS系统的要求选择合适功率的UPS,UPS备用电池备用间可以根据系统满负荷工作30分钟来考虑。由于UPS的故障不可避免,因此,UPS类型应考虑能够在线更换,避免更换或维修UPS影响DCS系统的运行。对于重要装置应考虑双机热备,但就现在的此类双机热备UPS,其同步常出现问题而影响后备切换。因此,UPS的选择应慎重。电源选择:包括220V交流分电盘和220V→24V(或12V、5V)电源。对于控制系统应保证交直流转换电源冗余,冗余电源输出应通过肖特基二极管并接(除非源说明可以直接输出并接),并避免冗余电源由一个交流分电盘供电。一般说来,此类电源的配置由DCS系统供货商提供,但此时应注意,要避免多个交流电源紧密布置而带来的散热效率不佳的设计布局,同时,向供货商要求提供的同类备用电源应不少于实际配置的20%(每种类型应至少有1个备件)。另外,24VDC电源选择应考虑带故障报警输出功能,并通过DI卡件输入DCS进行实时检测报警;如果确实没有故障输出报警,应考虑使用并接继电器的方式间接接入DCS完成。⑶通风及冷却设备选择:应保证整个系统所有设备的通风能力。特别是交直流电源设备、控制设备和大功率二极管。机柜的前后门应视内部实际设备的散热情况确定是否增加风扇等制冷设备。由于冷凝水问题,应尽量避免使用顶部直接排风方式(特别是DCS系统机柜),而且,机柜内部***好由提供温度检测报警。⑷过滤设备:在保证发热设备通风制冷的基础上,应减少灰尘和腐蚀性气体进入机柜或设备。因此,必须重视过滤网的使用。P0911CTPCNodebusConnectionP0911CWDualFloppyDiskDrive(SCSI)P0911GJDoorAssemblyFront(IE16)P0911GKDoorAssemblyRear(IE16)P0911GLDoorAssemblyFront(IE32)P0911GMDoorAssemblyRear(IE32)P0911GNTrackballP0911GQOkidataPrinterCableAdapterP0911HDFloppyDiskDrive(AP20),PedestalMountedP0911HEPeripheralJumperCableP0911HT5.25FloppyDiskDrive(AP20),MIWP0911JMInputPowerBusShort,24VdcP0911JNInputPowerBusShort,125VdcP0911JPInputPowerBusShort,100VacP0911JQInputPowerBusShort,120VacP0911JRInputPowerBusShort,220VacP0911JSInputPowerBusShort,240VacP0911JTInputPowerBusLong,24VdcP0911JUInputPowerBusLong,125VdcP0911JVInputPowerBusLong,100VacP0911JWInputPowerBusLong,120VacP0911JXInputPowerBusLong,220VacP0911JYInputPowerBusLong,240VacP0911KFIntermediatePowerBusLong,Primary/ExtBackupP0911KGIntermediatePowerBusLong,InternalBackupP0911KHIntermediatePowerBusShort,Primary/ExtBackupP0911KJIntermediatePowerBusShort,InternalBackupP0911KMSingle20FtCableToPLC-5/40,-5/60P0911KNSingle40FtCableToPLC-5/40,-5/60P0911KV19-InchWPDisplay(EnvironHardened)P0911KW19-InchHardenedWkstDisplay/TSP0911LDEHardenedCRTKeyboard/TrackballCableP0911LGWPGCIOExtension(WP20,25,&30),50FeetP0911LHWPGCIOExtension(WP20,25,&30),100FeetP0911LMWPGCIOExtension(WP20,25,&30),200FeetP0911LNWPGCIOExtension(WP20,25,&30),300Ft(EnvHard)P0911LPWPGCIOExtension(WP20,25,&30),400FeetP0911LQWPGCIOExtension(WP20,25,&30),500FeetP0911ML120MbHardDiskForAP20P0911NHIntelPC386P0911NJPW-CProcessorUnit(120Vac)P0911NKPW-CProcessorUnit(240Vac)P0911NLSVGA14-InchColorMonitor(120Vac)P0911NMAlphanumicKeyboard-101ATP0911NN105MbHardDiskP0911NUPWorPW-NBProcessorUnit(120Vac)P0911NVPWorPW-NBProcessorUnit(240Vac)P0911NWPW-FBorPW-HTGProcessorUnit(120Vac)P0911NXPW-FBorPW-HTGProcessorUnit(240Vac)P0911NYPW-SSIProcessorUnit(120Vac)P0911NZPW-SSIProcessorUnit(240Vac)P0911PUKeyboardP0911PVMouseAndPadP0911QAOISCommunicationCable(40Ft)P0911QBInputPowerBusVentedCableP0911QDInputPowerBusLong-VentedCableP0911QGInputBusLongCableP0911QLInputBusShortCableP0911RCCleaningKitP0911RDPW(HP286/12)DIsketteUpgradeKitP0911RHCarrierbandLAN4-PortIsolatedTapP0911RJCarrierbandLAN2-PortIsolatedTapP0911RKCarrierbandLAN4-PortSurgeTerminatedTapP0911RQ80MbHardDisk,w/KanjiV3.0AP20SWP0911RR80MbHardDisk,Pedestalw/KanjiV3.0AP20SWP0911RS80MbHardDisk,Workstationw/KanjiV3.0AP20SWP0911RT80MbHardDisk,w/V3.0AP20SWP0911RU80MbHardDisk,Pedestalw/V3.0AP20SWP0911RV80MbHardDisk,Workstationw/V3.0AP20SWP0911RWStatusCableP0911RXMemoryBatteryBackupAndStatusCableP0911SBCustomPaintingP0911***150MbStreamingTapeForAP20P0911SNPW(HPES/12)DisketteUpgradeKitP0911STCP10ToCP30UpgradeKit(NFT)P0911SUCP10(FT)ToCP30(FT)UpgradeKitP0911SVWP10ToWP30UpgradeKitP0911SWWP20ToWP30UpgradeKitP0911SYProtectiveCapP0911TJPW-NBCP/DP10ToCP30UpgradeKitP0911TKPW-NBCP/DP10(FT)ToCP30(FT)UpgradeKitP0911TRPW-CProcessorUnit(120Vac)P0911TSPW-CProcessorUnit(240Vac)P0911TTSVGA14-InchColorMonitor(240Vac)P0911TVPW-OEorPW-NBProcessorUnit(120Vac)P0911TWPW-OEorPW-NBProcessorUnit(240Vac)P0911TXPW-FBProcessorUnit(120Vac)P0911TYPW-FBProcessorUnit(240Vac)P0911TZPW-SSIProcessorUnit(120Vac)P0911UAPW-SSIProcessorUnit(240Vac)P0911VD19-InchWSDisplayw/TS(WP20/30Tabletop)P091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