A20B-1003-0180/01A
问：请问EM231模块至热电偶传感器距离是不是有长度限制，是多少，如果距离超过的话，有什么好的解决办法呢？
答：个人认为回路阻抗和干扰情况是决定传输距离的决定因素，理论上到变送器的距离为100米，是在回路阻抗小于100欧，干扰不严重的场合。
热电偶距离无法满足要求的话，先增加变送器，4~20mA信号足以满足你的距离要求了，再不行就将200与现场靠近些
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