SPASO11 ABB 模拟信号

SPASO11

基本信息

产品编号:SPASO11

ABB型号名称:SPASO11

目录说明:AO模块， 14通道，支持4-20mA,1-5V

详细描述:AO模块，14通道，支持4-20mA,1-5V

类别

产品》控制系统产品”l/O产品》S+HR I/O nS+ HR I/o -模块”S + HRI/o -模拟输出模块”SPASO11模拟输出模块

产品”控制系统w交响乐升级版vl/O ”HR系列(和谐机架)l/O " SPASO11

什么是模拟量

模拟显是指一些连续变化的物理量，如电压、电流、压力、速度、流量等信号量，模拟信号是幅度随时间连续变化的信号，通常电压信号为O~10V，电流信号为4~-20mA，可以用PLC的模拟量模块进行数据采集，其经过抽样和量化后可以转换为数字量。说到模拟量，就不得不提Al和AO，下面就来讲解下AI和AO。

Al和AO的讲解

(1)Al信号:模拟量输入

所谓模拟量即4-20mA或0-10V的电流或电压信号，输入到DCS中，经过变换，还原出原来的值，比如电流值到DCS中显示出来;电流互感器二次值(SA）经过电流变送器转换成4-20mA信号(5A对应20mA),输入到DCS机柜，经过转换，在DCS中显示实际的电流值。

(2)AO信号:模拟星输出

和AI相反，AO是DCS输出4-20mA或0-10V信号，去控制设备的运行参数;比如，变频器的速度控制过程，以40HZ为例，通过远程DCS控制，认为给定参数值: 40HZ，DCS同样发出一个对应的模拟量电流值，在4-20mA范围内（20mA对应50HZ)，信号传入到变频器的控制器，变频器按照要求运行在40HZ。

模拟量概念

在了解完上面的知识后，理解模拟量首先要了解几个概念，传感器、变送器、执行器还有AD转换器、DA转换器等。

那么这里所说的传感器，我们常用的传感器有哪些呢?常用的有温庶传感器，又包括了热电阻和热电偶这两种类型，还有压力传感器、湿度传感器等等。传感器是用于模拟量输入的，用于采集外部的温度、湿度、压力等信号。

SPASO11 ABB 模拟信号

SPASO11

Basic information

Product Number :SPASO11

ABB model name :SPASO11

Description :AO module, 14 channels, support 4-20mA,1-5V

Description :AO module, 14 channels, support 4-20mA,1-5V

category

Products "Control System products" l/O Products "S+HR I/O nS+ HRI/o - module" S+ HRI/o - Analog output module "SPASO11 analog output module

Product "Control System w Symphony Upgrade vl/O" HR Series (Harmony Rack)l/O "SPASO11

What is analog

Analog display refers to some continuous change of physical quantities, such as voltage, current, pressure, speed, flow and other semaphore, analog signal is the amplitude of continuous change with time signal, usually the voltage signal is O~10V, current signal is 4~-20mA, you can use PLC analog module for data acquisition, which can be converted to digital quantity after sampling and quantization. When it comes to simulation, we have to mention Al and AO, and let's explain AI and AO.

Al and AO's explanation

(1)Al signal: analog input

The so-called analog quantity is 4-20mA or 0-10V current or voltage signal, input into the DCS, after transformation, restore the original value, such as the current value displayed in the DCS; The secondary value of the current transformer (SA) is converted into a 4-20mA signal by the current transmitter (5A corresponds to 20mA), and is input to the DCS cabinet. After conversion, the actual current value is displayed in the DCS.

(2)AO signal: analog star output

In contrast to AI, AO is the DCS output 4-20mA or 0-10V signal to control the operating parameters of the device; For example, the speed control process of the frequency converter, taking 40HZ as an example, through remote DCS control, that given the parameter value: 40HZ, DCS also sends a corresponding analog current value, in the range of 4-20mA (20mA corresponds to 50HZ), the signal is passed to the controller of the frequency converter, and the frequency converter runs at 40HZ as required.

Analog concept

After understanding the above knowledge, to understand the analog first to understand several concepts, sensors, transmitters, actuators and AD converter, DA converter and so on.

So the sensors mentioned here, what are the sensors we commonly use? Commonly used temperature sensors, including thermal resistance and thermocouple of these two types, as well as pressure sensors, humidity sensors and so on. The sensor is used for analog input, which is used to collect external temperature, humidity, pressure and other signals.