单端口或双端口现场输入/输出设备与
生态结构™ 福克斯博罗™ DCS系统。
每个FBM233都有一个RJ-45连接器（10/100Mbps铜质以太网
连接），可用于连接到双端口
以太网设备。FBM233连接到以太网交换机或集线器，以便
与一个或多达64个外部设备通信。
一对模块组合在一起，在现场总线模块（FBM）级别提供冗余。
在此配置中，一个FBM233是主控模块，另一个是跟踪器模块。
控制站上的输入点根据
连接到主机的网络。设备输出点，取决于输入/输出驱动器，
由主模块和跟踪器模块写入。角色切换是自动的，如果
I/O检测到问题（例如，任何设备的心跳信号丢失）
驱动程序，或者用户可以通过SMDH随时切换角色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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