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DCS智能卡件的一般种类都有什么?

2021-09-13 16:10:24 来源:http://www.sdjkyqyb.com/ 53

1、模拟量输入输出卡:AI卡:通常指接收4-20mA信号的卡件,AO卡:输出4-20mA信号的卡件,RTD卡:接收热电阻信号,TC卡:接收热电偶信号。现在好多工厂都不太用RTD和TC卡件了,一般用一体化温度变送器或者温变安全栅将温度信号转换为4-20mA的信号进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、数字量输入输出卡:DI卡:数字量输入卡,DO卡:数字量输出卡,分别接收和输出数字信号(或者叫开关量信号),简而言之就是0或者1的通断信号。
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脉冲卡件,接收脉冲信号,这种卡件用的很少
3. PI pulse card, which receives pulse signals, is rarely used
4、通讯卡件:用得比较多的是MODBUSRTU通讯卡,对应的接口形式通常为RS485/422,也有RS232接口的,但用的不多。当然,还有MODBUSTCP/IP卡,RJ45接口的(和我们电脑上的网线口一样)。还有PROFIBUS-DP卡,这种通讯卡这两年用的越来越多了。
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,其实DCS还有很多卡件,只是不常用而已,比如很早以前还有用接受电压信号(一般是1-5V)的模拟量卡件,现在几乎没人用了。
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.
关于智能卡件,还有种说法就是针对AI/AO卡件而言,不仅仅是接收发送常规的4-20mA信号,同时还能接收HART信号的卡件。比如对于AI卡件来说,它不仅能接收4-20mA信号,还能将现场智能仪表的其他参数读上来。
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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