6ES7405-0DA02-0AA0

更新日期：2019年03月18日
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规格：6ES7405-0DA02-0AA0
所属行业：五金原材料-> 废金属-> 废镍
关键字：6ES74050DA020 6ES74050DA020 6ES74050DA020

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地址：中国福建厦门市厦门市思明区嘉禾路293号宝达大厦1003室

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柴油发电机组在无市电供应及需要不间断供电的地方，如电信系统、电力系统、广播电视系统的机站、机房，银行、医院等单位的供电系统等得到了广泛应用。在电信系统内，通常一个县级局要管理多个供电机房，这些机房有的位于市区，有的位于偏僻的高山，有的有人值守，有的无人值守，但都需要不间断供电，一般每个机房有一至数台柴油发电机组，作为市电供电的备用电源，或是几台机组互为主备供电。对这些柴油发电机组实现计算机自动监控和统一管理就显得很重要，这样有助于减少值班人员的工作强度，提高工作效率，提高管理水平。在县级局内设集中监控中心，监控主机通过公用电话网实现对各个下级机站柴油发电机组的远程实时自动监控和管理，系统构建方便，实现简单，使用可靠，适合实际的需求，得到了广泛应用。

1 系统结构
柴油发电机组远程监控平台的系统结构如图1所示。

柴油发电机组经MODEM与电话线路相连，在电话线路的另一端再经MODEM与监控主机的RS-232串口相连。
很多县级局和下级机站之间都有SDH信道相通，如果有附加的RS-232串口，也可以通过SDH信道传输数据，从而省掉电话线路两边的MODEM，等同于RS-232串口电缆直接相连。
如果一个下级机站内有多台柴油发电机组需要监控，在电话线路允许的情况下，可以为每台机组分配一条电话线，各占用监控主机的一个RS-232串口。如果电话线路有限，也可将机站内的各台柴油发电机组通过RS-485总线连成一个网络，经过RS-485/RS-232转换器，再接MODEM（见图2），通过一条电话线路与监控主机相连，只占用监控主机的一个RS-232串口，每个机组分配一个地址，监控主机依靠地址来区分机组，轮流通过同一条电话线路监控各台机组，但这样一来会降低监控系统的反应速度。

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