FBM205  直流模拟输入通道  数据转换实现高精度

特点

该FBM 205.0至20mA的V/0接口(冗余)包含4个冗余0至20mA直流模拟输入通道和4个冗余0到20 mA的直流模拟输出通道。输入/输出与其他通道和接地电隔离

一对冗余模块组合在一起，在现场总线模块(FBM)级别提供冗余，现场VO连接到一个公共终端组件(见图一)。FBM205每个模块独立地尝试将输出保持在其指定的输出值，并且每个模块独立地报告其观察到的输入值。

控制软件中的冗余模拟输入和冗余模拟输出模块结合到/来自模块的信息验证每个输入和输出

FBM205与标准HART信号电气兼容

4个冗余 20 mA 直流模拟输入通道4个冗余的20 mA直流模拟输出通道每个输入和输出通道都是电隔高的c

坚固耐用的设计，适用于G3级(恶劣)环境中的外壳执行模拟输入应用程序，提供转换时间和变化率限制的可配置选项

输出安全性模块中的可配置选项包括防故障操作

通过每个通道的sigma-delta数据转换实现高精度

端接组件(TA)，用于将现场布线本地或远程连接到FBM205

FBM供电发射机上的冗余环路电源

用于每个通道内部和/或外部环路供电变送器的3层端接组件

FBM205输出通道

模拟精度:±0.05%的范围

输出负载:750Ωma最大

·输出处理延迟:最大30毫利

·分辨率:13位

现场设备布线距离:

现场设备与FBM之间的最大距离是合规电压(19.6VDC,20.4mA)、导线电阻和现场设备上的电压降的函数。

回路电源保护:

每个通道都是通道间的电流隔离、电流限制和电压调节。

所有模拟输出都受到其设计的限制，约为25 mA。如果输出场效应管短路，输出电流可以增加到35毫安。正常运行时，FBM的电流为a0到750Ω。

peculiarity

The FBM 205.0 to 20mA V/0 interface (redundant) consists of four redundant 0 to 20mA DC analog input channels and four redundant 0 to 20mA DC analog output channels. The input/output is electrically isolated from other channels and ground

A pair of redundant modules are combined to provide redundancy at the fieldbus module (FBM) level, with the field VO connected to a common terminal component (see Figure 1). FBM205 Each module independently attempts to keep the output at its specified output value, and each module independently reports the input values it observes.

The redundant analog input and redundant analog output modules in the control software are combined with/information from the module to verify each input and output

The FBM205 is electrically compatible with standard HART signals

Four redundant 20 mA DC analog input channels Four redundant 20 mA DC analog output channels Each input and output channel is a high electrical separation c

Rugged design for enclosure execution analog input applications in G3 (harsh) environments, with configurable options for conversion time and rate of change limits

Configurable options in the output security module include fail-safe operations

High precision is achieved through sigma-delta data conversion on each channel

The termination assembly (TA) is used to connect the field cabling locally or remotely to the FBM205

The FBM supplies redundant loop power to the transmitter

3-layer terminating assembly for each channel internal and/or external loop powered transmitter

FBM205 Output channel

Simulation accuracy :±0.05% range

Output load :750Ωma Max

· Output processing delay: up to 30 milli

· Resolution :13 bits

Field device wiring distance:

The maximum distance between the field device and the FBM is a function of the compliance voltage (19.6VDC,20.4mA), wire resistance, and voltage drop on the field device.

Loop power protection:

Each channel is current isolation, current limiting and voltage regulation between channels.

All analog outputs are limited by their design, at about 25 mA. If the output FET is short-circuited, the output current can be increased to 35 mA. In normal operation, the current of the FBM is a0 to 750Ω.