FBM237 P0914XS 8个0-20 mA模拟输出通道

FBM237, 0至20 mA输出模块包含八个通道。输出电流与其他通道和地隔离。该模块可以用作单个单元，也可以作为冗余的一对(两个)
FBM237s)。
当作为冗余对使用时，现场输出信号被连接到一个公共终端组件(见图1)。对中的每个模块独立地将输出保持在其的输出值。
特性
FBM237的主要特点是:
8个20ma直流模拟输出通道
每个输出通道是电隔离的
单个或冗余模块
坚固耐用的设计，适用于G3(恶劣)环境的外壳
终端组件(TAs)用于本地或远程连接现场布线到FBM237

TA与输出旁通站一起使用，在维护操作期间保持输出
用于每个通道内部和/或外部环路供电发射机的3层终端组件。
FBM237与标准HART信号在电气上兼容。

冗余模拟输出功能块AOUTR用于每个冗余输出对。AOUTR块处理冗余通道的输出写入和初始化逻辑。在每个执行周期中，相同的输出写入被发送到两个模块，充分行使现场总线和每个模块的逻辑电路。当在其中一个模块中检测到故障时，其输出被驱动到0 mA，并且良好模块中的相应通道自动继续提供适当的电流。
每个输出通道驱动一个外部负载。
来自每个模块的发射器功率在冗余适配器中二极管或一起，以确保冗余功率。每个模块的微处理器执行模拟输出应用程序，以及验证模块健康的安全例程。

The FBM237, 0 to 20 mA Output Module contains eight channels.The outputs are galvanically isolated from other channels and ground. The module can be used as a single unit, or as a redundant pair (two
FBM237s).
When used as a redundant pair, field output signals are wired to one common termination assembly (see Figure 1). Each module in the pair independently holds the output(s) at its specified output value(s).
FEATURES
The key features of the FBM237 are:
 Eight 20 mA DC analog output channels
 Each output channel is galvanically isolated
 Single or redundant modules
 Rugged design suitable for enclosure in Class G3 (harsh) environments
 Termination Assemblies (TAs) for locally or remotely connecting field wiring to the FBM237

 TA for use with Output Bypass Station to maintain outputs during maintenance operations
 3-tier termination assembly for per channel internally and/or externally loop powered transmitters.
 The FBM237 is electrically compatible with standard HART signals.

A redundant analog output function block, AOUTR, is used for each redundant pair of outputs. The AOUTR block handles output writes and initialization logic for the redundant channels. On each execution cycle identical output writes are sent to both modules, fully exercising the fieldbus and the logic circuitry of each module. When a failure is detected in one of the modules, its output is driven to 0 mA and the corresponding channel in the good module automatically continues supplying the proper current.
Each output channel drives an external load.
Transmitter power from each module is diode OR’d together in the redundant adapter to assure redundant power. The microprocessor of each module executes the analog output application program, plus security routines that validate the health of the module.