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用em231接收变送器4-20ma信号，实际电流是多少呢？

2025-03-15 10:25:45

推荐回答（2个）

回答1：

需要注意，变送器输出时4~20mA，而不是0~20mA。
假设变送器的额定输入电流为100A。
那么，实际电流是：（10-4）*100/（20-4）=37.5A。

回答2：

还需要加入, 变送器的变送比, 比如1:10, 10ma*10=100ma

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