單端口或雙端口現場輸入/輸出設備與
生態結構™ ?？怂共┝_™ DCS系統。
每個FBM233都有一個RJ-45連接器（10/100Mbps銅質以太網
連接），可用于連接到雙端口
以太網設備。FBM233連接到以太網交換機或集線器，以便
與一個或多達64個外部設備通信。
一對模塊組合在一起，在現場總線模塊（FBM）級別提供冗余。
在此配置中，一個FBM233是主控模塊，另一個是跟蹤器模塊。
控制站上的輸入點根據
連接到主機的網絡。設備輸出點，取決于輸入/輸出驅動器，
由主模塊和跟蹤器模塊寫入。角色切換是自動的，如果
I/O檢測到問題（例如，任何設備的心跳信號丟失）
驅動程序，或者用戶可以通過SMDH隨時切換角色The FBM233 Redundant Field Device System Integrator (FDSI) module provides an
Ethernet interface between single or dual-ported field I/O devices and the
EcoStruxure™ Foxboro™ DCS system.
Each FBM233 has a single RJ-45 connector (10/100Mbps copper Ethernet
connection) on the front of the module that can be used to connect to dual-ported
Ethernet devices. The FBM233 is connected to Ethernet switches or hubs in order to
communicate with one external device or up to 64 external devices.
A pair of modules combine to provide redundancy at the Fieldbus Module (FBM) level.
In this configuration, one FBM233 is the Master, and the other is the Tracker module.
Input points on the control station are updated from the device inputs received on the
network connected to the Master. Device output points, depending on the I/O driver,
are written by both the Master and Tracker module. Role switching is automatic if
problems are detected (for example, loss of heartbeat from any device) by the I/O
driver, or the user can switch the roles at any time via SMDH. The general network
configuration is shown in Figure 1, page 5.
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