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压力变送器接线方式及二三线制接线实物图[详细】

作者: 来源: 日期:2018-9-21 11:36:47 人气:290

常规状态下,压力变送器都是4-20mA电流输出的,而4-20mA电流输出的压力变送器接线都是两线制,但是还是有很多用户不知道如何接线。下面昆山丹瑞先详细说明下两线制4-20mA电流信号输出的压力变送器接线,接线实物图如下图:  

 压力变送器接线方式及二三线制接线实物图[详细】昆山丹瑞

打开压力变送器后盖,你会看到有四个压力变送器接线端子,OUT正负和TEST正负,这里我们接OUT正负,TEST正负是厂家用来标定压力变送器用的,现场使用就不用管着两个端子的有什么作用,直接OUT正负就行。   

压力变送器接线方式及二三线制接线实物图[详细】-昆山丹瑞

三线制接线实物图如上图所示,24V电源供电,24V+接OUT正,24V-接OUT负。这样,简单的两步即可完成压力变送器接线,当然,市面上还有一些三线制的压力变送器,那么三线制压力变送器接线怎么接呢? 三线制变换器的接线图如图 2 所示,电流输出系统除了两根电流传输线以外,还有一根电源线向变压器提供电源。 三线制就是电源正端用一根线,信号输出正端用一根线,电源负端和信号负端共用一根线。 其供电大多为 DC 24V , 输出信号有 DC4-20mA ,负载电阻为 250Ω 或者 DC0-10mA ,负载电阻为 0-1.5kΩ ;有的还有 mA 和 mV 信号,但负载电阻或输入电阻,因输出电路形式不同而数值有所不同。      

其实压力变送器接线问题即便有客户不懂,联系昆山丹瑞厂家电话指导也非常简单。现在设备无论变送器还是电子显示仪还是其他阀门或者泵阀都是有接线端子图或者直接两个正负极端子,一目了然非常简单。

Under normal conditions, pressure transmitters are 4-20 mA current output, and 4-20 mA current output pressure transmitter wiring is two-wire system, but there are still many users do not know how to wiring. The following Kunshan Than Shwe first details the connection of the pressure transmitter with 4-20mA current signal output from the next two-wire system, as follows:

Open the back cover of the pressure transmitter, you will see that there are four pressure transmitter terminals, OUT positive and negative and TEST positive and negative, here we connect OUT positive and negative, TEST positive and negative is used by the manufacturer to calibrate the pressure transmitter, site use does not need to care about the two terminals have any effect, direct OUT positive and negative on the line.

As shown above, 24V power supply, 24 V + OUT positive, 24 V to OUT negative. In this way, a simple two-step pressure transmitter connection can be completed, of course, there are also some three-limit pressure transmitters on the market, so how to connect the three-limit pressure transmitter connection? The wiring diagram of the three-wire converter is shown in Figure 2. In addition to two current transmission lines, the current output system has one power line to supply power to the transformer. The three-wire system is that the positive end of the power supply uses a wire, the positive end of the signal output uses a wire, and the negative end of the power supply and the negative end of the signal share a wire. Its power supply is mostly DC 24V, the output signal is DC4-20mA, the load resistance is 250_or DC0-10mA, the load resistance is 0-1.5k; Some also have mA and mV signals, but the load resistance or input resistance, due to the different form of the output circuit and the value is different.

In fact, pressure transmitter wiring problems even if customers do not understand, contact Kunshan Than Shwe manufacturer telephone guidance is very simple. Now the equipment, whether transmitter or electronic display or other valves or pump valves are wiring terminal diagram or direct two positive and negative terminals, at a glance is very simple.

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