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SB821模块3BSE018109R1CPUs / 特色PM851PM856PM860PM861APM864APM865PM866PM891处理器单元PM851PM856PM860PM861APM864APM865PM866PM891高完整性控制器？否否否否否是否否时钟频率24 MHz24 MHz48 MHz48 MHz96 MHz96 MHz133MHz450MHz存储 (RAM)8 Mb8 Mb8 Mb16 Mb32 Mb32 Mb64 Mb256 Mb支持冗余CPU？否否否是是是是是冗余配置时的切换时间---最长10 ms最长10 ms最长10 ms最长10ms最长10ms以太网通道数目12222222性能, 1000 boolean operations(a:=b and c)0.46 ms0.46 ms0.23 ms0.23 ms0.15 ms0.15 ms0.09 ms0.043 msCEX总线连接通讯模块112121212121212通过ModuleBus扩展的I/O群（本地I/O)1 el. + 1 opt.1 el. + 7 opt.1 el. + 7 opt.1 el. + 7 opt.1 el. + 7 opt.1 el. + 7 opt.1 el. + 7 opt.0 el. + 7 opt.通过ModuleBus扩展的I/O性能 (本地I/O)(仅用于非冗余配置)最多24个I/O模块最多96个I/O模块最多96个I/O模块最多96个I/O模块最多96个I/O模块有限制，详情参见用户手册最多96个I/O模块最多96个I/O模块支持的通讯模块ProfibusFoundationFieldbusRS-232 CMB300INSUMDrivebusS100 I/OinterfaceGeniusTRIO I/OSatt I/O模块CI854ACI860CI853CI855CI857CI858CI856CI862CI865协议DP-V1(PA vialinkingDevice)HSE(H1 vialinkingDevice)Modbusmaster,Comlimaster/slave,Siemensmaster,User defi nedprotocolsMB300IEEE 802.3ABB’sDrivebusABB’sS100 I/OGeniusABB′sSatt I/OMaster或 slaveMasterMasterMaster/slaveMaster/slaveMasterMasterMasterMasterMaster通道数目112211 main, 2 aux111支持的通讯