ALSTOM BGTR8HE控制卡件
FBM214 HART通信输入接口
模块包含八个4至20 mA组隔离模拟输入信道。FBM214支持任何标准4至20 mA装置和HART的混合设备。
FBM214用作HART通信字段设备主机，使I/A系列系统能够每秒请求和接收两条数字消息来自现场设备。信息传递能力可用于支持HART通用，通用实践和设备特定命令，但不是突发通信模式。这些命令使用智能现场设备配置器（IFDC）-参考详情见PSS 21S-8A3 B3）。
FBM214提供公共隔离电源为所有八个通道供电。可选地通道可由外部电源供电供给然而，当公共外部电源
电源用于两个或多个信道，一根电缆需要平衡-不平衡变换器模块以防止通道交叉说话
紧凑设计FBM214设计紧凑，坚固耐用挤压铝外壳，用于物理保护
电路。专为以下目的设计的外壳：安装FBM可提供不同级别的环境保护，适用于恶劣环境
根据ISA标准S71.04。
高精度为了实现高精度，该模块包含一个SigmaDelta转换器，可提供新的模拟输入
每100毫秒一个通道的值。特征
FBM214模块的主要功能包括：
八个模拟输入通道，每个通道接受一个
以下输入：
•标准4至20 mA模拟传感器信号
•数字HART频移键控（FSK）
叠加在4至20 mA模拟上的信号输入信号。
专用于每个输入信道的FSK调制解调器
双向数字通信HART现场设备
4至来自HART设备的20 mA输入信号
支持HART通用命令
现场设备与I/A Series®系统数据库
8组输入的电流隔离接地和模块逻辑通道
紧凑、坚固的设计，适用于G3级（恶劣）环境
通过sigma-delta数据实现高精度每个频道的转换
用于本地或将现场接线远程连接至FBM214
每个通道内部的终端组件和/或外部环路供电的发射器。
The FBM214 HART Communication Input Interface
Module contains eight 4 to 20 mA group isolated
analog input channels. The FBM214 supports any
mix of standard 4 to 20 mA devices and HART
devices.
The FBM214 serves as a HART communications field
device host, enabling the I/A Series system to
request and receive two digital messages per second
from the field device. The message pass-through
capability can be used to support HART universal,
common practice, and device-specific commands,
but not the burst communication mode. These
commands are implemented using the Intelligent
Field Device Configurator (IFDC — refer to
PSS 21S-8A3 B3 for details).
The FBM214 provides a common isolated power
supply to power all eight channels. Optionally, the
channels can be powered by an external power
supply. However, when a common external power
supply is used with two or more channels, a Cable
Balun module is required to prevent channel cross
talk.
COMPACT DESIGN
The FBM214 has a compact design, with a rugged
extruded aluminum exterior for physical protection of
the circuits. Enclosures specially designed for
mounting the FBMs provide various levels of
environmental protection, up to harsh environments
per ISA Standard S71.04.
HIGH ACCURACY
For high accuracy, the module incorporates a SigmaDelta converter which can provide new analog input
values for each channel every 100 milliseconds. FEATURES
Key features of the FBM214 module are:
Eight analog input channels, each accepting one
of the following inputs:
• Standard 4 to 20 mA analog sensor signal
• Digital HART Frequency Shift Keying (FSK)
signal superimposed on a 4 to 20 mA analog
input signal.
FSK modem dedicated to each input channel for
bi-directional digital communications with a
HART field device
Analog to digital conversion of each of the 4 to
20 mA input signals from the HART devices
Support for the HART universal commands
necessary to interface the field device with the
I/A Series® system database
Galvanic isolation of the group of 8 input
channels from ground and module logic
Compact, rugged design suitable for enclosure in
Class G3 (harsh) environments
High accuracy achieved by sigma-delta data
conversions for each channel
Termination Assemblies (TAs) for locally or
remotely connecting field wiring to the FBM214
Termination Assemblies for per channel internally
and/or externally loop powered transmitters.
