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              新聞資訊
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              DCS智能卡件的一般種類都有什么?

              2021-09-13 16:10:24 來源:http://www.eboudy.com/ 53

              1、模擬量輸入輸出卡:AI卡:通常指接收4-20mA信號的卡件,AO卡:輸出4-20mA信號的卡件,RTD卡:接收熱電阻信號,TC卡:接收熱電偶信號?,F在好多工廠都不太用RTD和TC卡件了,一般用一體化溫度變送器或者溫變安全柵將溫度信號轉換為4-20mA的信號進AI卡。
              1. Analog input / output card: AI card: usually refers to the card that receives 4-20mA signal, Ao card: the card that outputs 4-20mA signal, RTD card: the thermal resistance signal, TC card: the thermocouple signal. Now many factories do not use RTD and TC cards. Generally, integrated temperature transmitter or temperature change safety barrier is used to convert the temperature signal into 4-20mA signal into AI card.
              2、數字量輸入輸出卡:DI卡:數字量輸入卡,DO卡:數字量輸出卡,分別接收和輸出數字信號(或者叫開關量信號),簡而言之就是0或者1的通斷信號。
              2. Digital input / output card: Di card: digital input card, do card: digital output card, which receives and outputs digital signals (or switching signals) respectively. In short, it is the on-off signal of 0 or 1.
              浙大中控dcs卡件XP313
              3、PI脈沖卡件,接收脈沖信號,這種卡件用的很少
              3. PI pulse card, which receives pulse signals, is rarely used
              4、通訊卡件:用得比較多的是MODBUSRTU通訊卡,對應的接口形式通常為RS485/422,也有RS232接口的,但用的不多。當然,還有MODBUSTCP/IP卡,RJ45接口的(和我們電腦上的網線口一樣)。還有PROFIBUS-DP卡,這種通訊卡這兩年用的越來越多了。
              4. Communication card: Modbus RTU communication card is often used, and the corresponding interface form is usually RS485 / 422. There are also RS232 interfaces, but they are not used much. Of course, there are Modbus TCP / IP card and RJ45 interface (the same as the network cable port on our computer). There is also PROFIBUS-DP card, which is used more and more in the past two years.
              以上卡件是DCS常用的卡件,其實DCS還有很多卡件,只是不常用而已,比如很早以前還有用接受電壓信號(一般是1-5V)的模擬量卡件,現在幾乎沒人用了。
              The above cards are commonly used in DCS. In fact, there are many cards in DCS, but they are not commonly used. For example, there were analog cards that received voltage signals (generally 1-5V) long ago, but now almost no one uses them.
              關于智能卡件,還有種說法就是針對AI/AO卡件而言,不僅僅是接收發送常規的4-20mA信號,同時還能接收HART信號的卡件。比如對于AI卡件來說,它不僅能接收4-20mA信號,還能將現場智能儀表的其他參數讀上來。
              As for smart cards, there is another saying that AI / AO cards can not only receive and send conventional 4-20mA signals, but also receive Hart signals. For example, AI cards can not only receive 4-20mA signals, but also read other parameters of field intelligent instruments.
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