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供应PM9871A-51变送器
PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器PM9871A-51变送器
[主要技术指标]
(1).额定环路电流:DC4-20mA(静态、满程可调节)
(2).额定控制端电压:DC0-5V±10%(静态、满程可调节)
(3).额定工作电压:+24V±20%
(4).额定控制端输入电流:≤100uA
(5).额定电源功耗:静态4mA,动态时相等与环路电流20mA
(6).非线性失真:0.1%FS
(7).额定输出电流温漂:≤50ppm/℃
(8).静态零电平:(4mA) 调节范围:4mA±25%(3mA-5mA)
(10).最小工作电压:>15V
(11).极限工作电压:≤35V
(12).额定输出过流限制保护:内部限制25mA+10%;
(13).两线端口瞬态感应雷与浪涌电流TVS抑制保护能力:TVS抑制冲击电流
35A/20ms/1.5KW; (需外接1.5KE35CA瞬态抑制二极管)
(14).两线端口接错保护:电源反接保护 (需外接1N4007二极管)
(15).工作温度: -40℃-80℃
(16).贮存温度: -50℃-100℃
【优点】
【主要特点】 |
●不易受寄生热电偶和沿电线电阻压降和温漂的影响 |
●在电流源输出电阻足够大时,经磁场耦合感应到导线环路内的电压,不会产生显著影响 |
●电容性干扰会导致接收器电阻有关误差 |
●各个单台示读装置或记录装置可以在电线长度不等的不同通道间进行换接,不因电线长度的不等造成精度的差异 |
●将4mA用于零电平,使判断开路或传感器损坏(0mA状态)十分方便 |
●在两线输出口容易增设防浪涌和防雷器件,有利于安全防雷防爆 =============================================================================== DH4-20mA电量变送器变送器模块是中科院方舟公司采用意法半导体(ST)ASIC芯片为实现无源交流隔离传感器(互感原理)的两线制电流遥测技术手段而定型生产的单片模块产品。无源交流隔离传感器(互感原理)输入的电流电压信号经整流滤波和I/V转换后输出一个随I1线性变化的直流电压信号U2,U2作为浮地控制信号去控制该模块输出4~20mA的标准化电流环路,该模块实现了无源交流隔离传感器信号变换为两根连接线路发送的呈线性比例的环路电流,接受器通过测量已知电阻RL两端的压降对环路电流进行检测。 |
四【其他】:
【产品包装及运输】正常包装运输,会用适当防护。
【售后服务】1:保修期一年。2:买方须在正常允许环境范围内使用并且接线必须正确无误。3:如果未按照正确操作而导致损坏的不在保修范围内。'