FOXBORO FBM214B 模拟输入通道

FBM214B模拟输入通道概述

FOXBORO FBM214B是一款专业的通信输入模块，它具备8个独立隔离的模拟输入通道。这些通道支持4至20mA的模拟传感器信号输入，同时也能够处理数字HART频移键控(FSK)信号叠加在4至20mA模拟输入信号上的情况。

FBM214B模拟输入通道特性

FBM214B的每个模拟输入通道都具有以下特点：

独立隔离：每个通道都独立隔离，可以有效避免通道间的相互干扰1。

4至20mA模拟传感器信号：每个通道都能接受标准的4至20mA模拟传感器信号。

数字HART频移键控(FSK)信号：除了标准的模拟信号，每个通道还能处理数字HART FSK信号叠加的情况。

外部电源供电：除内部电源外，每个通道还可以选择由外部电源供电。但是，当公共外部电源用于两个或多个通道时，需要使用平衡-不平衡模块来防止HART通信信道串扰。

应用领域

FBM214B模拟输入模块广泛应用于各种工业自动化环境中，特别是在需要与HART设备通信的场合。它能够作为HART通信现场设备主机，支持Foxboro DCS每秒从现场请求和接收两条数字消息。

FBM214B Overview of analog input channels

The FOXBORO FBM214B is a professional communication input module with 8 independently isolated analog input channels. These channels support analog sensor signal inputs from 4 to 20mA and are also capable of handling digital HART frequency shift keying (FSK) signals overlaid on analog input signals from 4 to 20mA.

FBM214B simulates input channel features

Each analog input channel of the FBM214B has the following characteristics:

Independent isolation: Each channel is independently isolated, which can effectively avoid mutual interference between channels1.

4 to 20mA analog Sensor signals: Each channel can accept standard 4 to 20mA analog sensor signals.

Digital HART Frequency Shift Keying (FSK) signals: In addition to the standard analog signals, each channel can also handle the superposition of digital HART FSK signals.

External power supply: In addition to the internal power supply, each channel can also be powered by an external power supply. However, when the common external power supply is used for two or more channels, a balanced-unbalanced module is needed to prevent crosstalk in HART communication channels.

Application field

The FBM214B analog input module is widely used in various industrial automation environments, especially where communication with HART devices is required. It is capable of acting as a HART communication field device host, supporting Foxboro DCS to request and receive two digital messages per second from the field.