可以在工业设施中发现的所有常用电压水平上检测离散输入。FBM2O7/b/c使用几个终端组件中的一个来匹配外部供电的电压水平。在输入对电厂控制方案至关重要的情况下，可将FBM 207/b/c安装为冗余对，并配有用于管理冗余的标准控制块。概述FBM207/b/c电压监测仪/接触感测输入模块功能为16路直流电压监测仪或16路接触传感器。每个通道接受来自直流电压源(FBM2O7)或对触点或固态开关(FBM207b/FBM207c)的2线输入。相关终端组件(TAs)支持60v DC、120v AC/ 125vDC或240v AC电压下的离散输入信号。对于高于60vDC的电压，TAs具有额外的信号调理硬件，提供电压衰减和光隔离。每个离散输入与其他通道和地电隔离。组隔离时，使用外部激励。该模块执行从现场传感器到冗余模块现场总线的电气输入信号接口所需的信号转换。
FBM207B
此外，它还执行离散输入，梯形逻辑，脉冲计数和事件序列的程序，并具有输入滤波器时间的可配置选项。该模块可以用作单个单元，也可以用作冗余对。当作为冗余对使用时，这些模块结合起来在现场总线模块(FBM)级别提供冗余，现场输入信号通过一个附加在FBM底板上的冗余适配器从一个公共终端组件接收。冗余模块的输入电流增加一倍。Foxboro EvoM控制软件中的冗余数字输入块与模块的信息一起验证每个输入，并选择控制策胳中处理质量最高的输入。在冗余配置中，来自每个模块的接触感测功率在冗余适配器中二极管或一起，以确保冗余功率。
FBM207B
Discrete inputs can be detected at all commonly used voltage levels found in industrial facilities. FBM2O7/b/c uses one of several terminal components to match the voltage level of external power supply. In cases where input is crucial for the power plant control scheme, FBM 207/b/c can be installed as a redundant pair and equipped with standard control blocks for managing redundancy. Overview: The FBM207/b/c voltage monitor/contact sensing input module has 16 DC voltage monitors or 16 contact sensors. Each channel receives a 2-wire input from a DC voltage source (FBM2O7) or from a contact or solid-state switch (FBM207b/FBM207c). The relevant terminal components (TAs) support discrete input signals at 60v DC, 120v AC/125vDC, or 240v AC voltages. For voltages above 60vDC, TAs have additional signal conditioning hardware to provide voltage attenuation and optical isolation. Each discrete input is isolated from other channels and ground currents. When isolating groups, external incentives are used. This module performs the signal conversion required for the electrical input signal interface from the field sensor to the redundant module fieldbus.
FBM207B
In addition, it also executes programs for discrete inputs, ladder logic, pulse counting, and event sequences, and has configurable options for input filter time. This module can be used as a single unit or as a redundant pair. When used as redundant pairs, these modules are combined to provide redundancy at the Field Bus Module (FBM) level, where the field input signals are received from a common terminal component through a redundant adapter attached to the FBM backplane. Double the input current of the redundant module. The redundant digital input blocks in Foxboro EvoM control software are used to verify each input along with the module’s information, and the input with the highest processing quality in the control strategy is selected. In a redundant configuration, the contact sensing power from each module is diode or together in the redundant adapter to ensure redundant power.
FBM207B
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