1、现场总线对传统dcs的冲击
　　R88D-UA04V现场总线对传统dcs的冲击来源于其本质上优越于dcs系统的技术特征。根据国际电工委员会IEC和现场总线基金会FF的定义，现场总线技术具有以下5个主要特点：
　　①数字信号完全取代4-20mA模拟信号；
　　②使基本过程控制、报警和计算功能等完全分布在现场完成；
　　③使设备增加非控制信息，如自诊断信息、组态信息以及补偿信息等；
　　④实现现场管理和控制的统一；
　　⑤真正实现系统开放性、互操作性。
　　R88D-UA04V现场总线技术不仅是一种通信技术，它实际上融人了智能化仪表、计算机网络和开放系统互连(OSI)等技术的精粹。所有这些特点使得以现场总线技术为基础的现场总线控制系统(FCS)相对于传统dcs系统具有巨大的优越性：
　　①系统结构大大简化，成本显著降低；
　　②现场设备自治性加强，系统性能全面提高；
　　③提高了信号传输的可靠性和精度；
　　④R88D-UA04V真正实现全分散、全数字化的控制网络；
　　⑤用户始终拥有系统集成权。
　　这些优越性可从dcs和现场总线系统的网络结构比较后得到验证。

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 R88D-UA04V
R88D-UA08HA AC200V 200W
R88D-UA08V
R88D-UA10LA AC100V 100W
R88D-UA12HA AC200V 400W
R88D-UA12LA AC100V 200W
R88D-UA12V
R88D-UA20HA AC200V 750W
R88D-UA20V
R88D-UP02HA AC200V 30W
R88D-UP03HA AC200V 50W
R88D-UP03LA AC100V 30W
R88D-UP04HA AC200V 100W
R88D-UP04LA AC100V 50W
R88D-UP04V
R88D-UP08HA AC200V 200W
R88D-UP08V
R88D-UP12HA AC200V 400W
R88D-UP12LA AC100V 200W
R88D-UP12V
R88D-UP15LA AC100V 300W
R88D-UP20HA AC200V 750W
R88D-UT120H AC200V 5.0KW
R88D-UT24H AC200V 1.0KW
R88D-UT40H AC200V 1.5KW
R88D-UT40V
R88D-UT60V
R88D-UT80H AC200V 3.0KW
R88D-UT80V
R88D-WT01H
R88D-WT01HL
R88D-WT02H
R88D-WT02HL
R88D-WT04H
R88D-WT05H
R88D-WT08H
R88D-WT10H
R88D-WT150H
R88D-WT15H
R88D-WT20H
R88D-WT30H
R88D-WT50H
R88D-WT60H
R88D-WT75H
R88D-WTA3H
R88D-WTA3HL
R88D-WTA5H
R88D-WTA5HL
R88M-H05030 AC50W

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