ALSTOM PIB100G接口電源板
視覺指示器集成到中的發(fā)光二極管（LED）
模塊的前部提供以下方面的視覺指示：模塊的運行狀態(tài)和通信頻道上的活動。
易于拆卸/更換模塊可在以下情況下拆卸/更換：拆除現(xiàn)場設備終端電纜、電源或通信布線。
現(xiàn)場總線通信
現(xiàn)場總線通信模塊或控制器處理器接口冗余2 Mbps模塊
FBMs使用的現(xiàn)場總線。FBM214模塊
接受來自以下任一路徑（A或B）的通信：冗余2 Mbps現(xiàn)場總線——如果一條路徑出現(xiàn)故障或在系統(tǒng)級切換，模塊在活動路徑上繼續(xù)通信。
使用兩個共用的外部電源一個或多個回路需要電纜平衡-不平衡變換器模塊：保持通信和信號線平衡。
模塊化基板安裝
模塊安裝在模塊基板上，該基板：最多可容納四個或八個FBM。這個模塊化基板為DIN導軌安裝式或機架式
安裝，包括信號連接器，用于冗余現(xiàn)場總線、冗余獨立直流電源和終端電纜。
終端組件現(xiàn)場輸入信號通過以下方式連接至FBM子系統(tǒng)：DIN導軌安裝TAs。用于FBM214在“終止”中描述
“組件和電纜”電纜平衡-不平衡變換器模塊
電纜平衡-不平衡變換器模塊用于維護數(shù)字
HART變送器至的通信線路平衡
由公共電源供電的FBM回路外部電源。這是有效的動力將每個回路的一條線連接在一起。沒有
平衡-不平衡變換器，在每個這樣供電的回路中外部電源的連接
在系統(tǒng)端造成近端串擾回路布線電纜。使用FBM內部電源的回路源不需要平衡-不平衡變換器。電纜巴倫模塊包含多個巴倫。
每個環(huán)路中有一個平衡-不平衡變換器段互連由外部電源供電上圖。有一個電纜平衡-不平衡變換器模塊。
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.
