FBM208-P0914TB 冗余模块  提供冗余模块(FBM)级

型号：FBM208-P0914TB

可以采用高可用性要求的单输入/单输出控制方案，作为冗余对排列的FBM208的优点。一个回读特性是前提是检测输出通道的故障。在修理的情况下，当一个模块更换后，输入输出由冗余模块维护。

HART®信号与4- 20ma信号在电气上兼容，允许工厂无需更改控制系统即可升级现场设备。的FBM208b提供相同的功能，用于从旧版本升级

FBM05。一对冗余的模块组合在现场总线上提供冗余模块(FBM)级，与现场I/O连接到一个公共终端组件。每个模块都独立地尝试将输出保持在其

指定的输出值，并且每个单独报告其对的观测值

输入Foxboro™DCS中的冗余模拟输入和冗余模拟输出块控制软件验证每个输入和输出与信息相结合/从模块。FBM208与标准hart信号在电气上兼容。

FBM208-P0914TB特性

•4个0至20 mA直流模拟输入通道

•4个0至20 mA直流模拟输出通道与回读

•将FBM的输出值与当前读回值进行比较。如果回读值与期望输出相差±2%以上，则FBM标记其输出通道坏

•监控FBM的内部通道电流环路功率并标记通道坏电源小于16v dc

•将通道标记为Bad会导致相应的通道处于冗余状态模块继续驱动输出

•冗余模块提高可靠性

•终端组件(TAs)用于本地或远程连接现场布线到FBM208回读FBM将其输出值与当前的回读值进行比较。如果回读值与期望输出相差±2%以上，则FBM标记其输出通道坏。另外，如果输出值比期望输出值大超过+2%，该通道的电源被关闭，以帮助防止坏通道不受冗余伙伴FBM对该信道控制的干扰。的

故障通道的电源保持关闭状态，直到FBM被替换或重新启动用户。

当FBM的输出通道被标记为BAD时，CP将该信息呈现给将Foxboro DCS显示为系统管理报警信息，并作为控制块报警。

Model: FBM208-P0914TB

The single input/single output control scheme that is required for high availability can be adopted as the advantage of redundant pair arrangement of the FBM208. A read-back feature is a prerequisite for detecting faults in the output channel. In the case of repair, when a module is replaced, the input and output are maintained by the redundant module.

HART® signals are electrically compatible with 4-20ma signals, allowing plants to upgrade field equipment without changing control systems. The FBM208b provides the same functionality for upgrading from older versions

FBM05. A pair of redundant module combinations provide redundant module (FBM) levels on a fieldbus, connected to a common terminal component with field I/O. Each module independently attempts to keep the output at its own

The output value is specified, and each individual reports the observed value of its pair

Input Redundant analog input and redundant analog output block control software in Foxboro™DCS verifies each input and output with information combined/from the module. The FBM208 is electrically compatible with standard hart signals.

FBM208-P0914TB features

• Four 0 to 20 mA DC analog input channels

•4 0 to 20 mA DC analog output channels with read-back

• Compares the output value of the FBM with the current read back value. If the read-back value differs from the expected output by more than ±2%, the FBM marks its output channel as bad

Monitor the internal channel current loop power of the FBM and mark the channel bad power supply less than 16v dc

• Marking a channel as Bad causes the corresponding channel to be in a redundant state and the module continues to drive output

• Redundant modules improve reliability

• The Terminal component (TAs) is used to locally or remotely connect field wiring to the FBM208 read-back FBM to compare its output value with the current read-back value. If the read-back value differs from the expected output by more than ±2%, the FBM marks its output channel as bad. In addition, if the output value is greater than the expected output value by more than +2%, the power supply to that channel is turned off to help prevent the bad channel from being interfered with by the redundant partner FBM to control that channel. the

The power to the faulty channel remains off until the FBM is replaced or the user is restarted.

When the output channel of the FBM is marked as BAD, CP presents this information to the Foxboro DCS displayed as a system management alarm and alarms as a control block.