ALSTOM PIB100G接口电源板
视觉指示器集成到中的发光二极管（LED）
模块的前部提供以下方面的视觉指示：模块的运行状态和通信频道上的活动。
易于拆卸/更换模块可在以下情况下拆卸/更换：拆除现场设备终端电缆、电源或通信布线。
现场总线通信
现场总线通信模块或控制器处理器接口冗余2 Mbps模块
FBMs使用的现场总线。FBM214模块
接受来自以下任一路径（A或B）的通信：冗余2 Mbps现场总线——如果一条路径出现故障或在系统级切换，模块在活动路径上继续通信。
使用两个共用的外部电源一个或多个回路需要电缆平衡-不平衡变换器模块：保持通信和信号线平衡。
模块化基板安装
模块安装在模块基板上，该基板：最多可容纳四个或八个FBM。这个模块化基板为DIN导轨安装式或机架式
安装，包括信号连接器，用于冗余现场总线、冗余独立直流电源和终端电缆。
终端组件现场输入信号通过以下方式连接至FBM子系统：DIN导轨安装TAs。用于FBM214在“终止”中描述
“组件和电缆”电缆平衡-不平衡变换器模块
电缆平衡-不平衡变换器模块用于维护数字
HART变送器至的通信线路平衡
由公共电源供电的FBM回路外部电源。这是有效的动力将每个回路的一条线连接在一起。没有
平衡-不平衡变换器，在每个这样供电的回路中外部电源的连接
在系统端造成近端串扰回路布线电缆。使用FBM内部电源的回路源不需要平衡-不平衡变换器。电缆巴伦模块包含多个巴伦。
每个环路中有一个平衡-不平衡变换器段互连由外部电源供电上图。有一个电缆平衡-不平衡变换器模块。
VISUAL INDICATORS
Light-emitting diodes (LEDs) incorporated into the
front of the module provide visual indication of the
module’s operational status, and communication
activity on the channels.
EASY REMOVAL/REPLACEMENT
The module can be removed/replaced without
removing field device termination cabling, power, or
communications cabling.
FIELDBUS COMMUNICATION
A Fieldbus Communication Module or a Control
Processor interfaces the redundant 2 Mbps module
Fieldbus used by the FBMs. The FBM214 module
accepts communication from either path (A or B) of
the redundant 2 Mbps fieldbus – should one path fail
or be switched at the system level, the module
continues communication over the active path.
The use of an external power supply common to two
or more loops requires a Cable Balun Module to
maintain communication signal line balance.
MODULAR BASEPLATE MOUNTING
The module mounts on a modular baseplate which
accommodates up to four or eight FBMs. The
modular baseplate is either DIN rail mounted or rack
mounted, and includes signal connectors for
redundant fieldbus, redundant independent dc
power, and termination cables.
TERMINATION ASSEMBLIES
Field input signals connect to the FBM subsystem via
DIN rail mounted TAs. The TAs used with the
FBM214 are described in “TERMINATION
ASSEMBLIES AND CABLES” on page 8.CABLE BALUN MODULE
The Cable Balun module is used to maintain digital
communication line balance for HART Transmitter to
FBM loops that are powered from a common
external power supply. This powering effectively
connects one line of each loop together. Without the
Baluns, in each loop so powered, the common
connection at the external power supply, would
cause near end crosstalk at the system end of the
loop wiring cable. Loops using FBM internal power
source do not require Baluns.The Cable Balun module contains multiple Baluns.
One Balun segment is interconnected in each loop
powered from an external power supply per the
diagram above. There is one Cable Balun module.
