FOXBORO FBM233

FBM233 FOXBORO Processor module

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Product Details

Each FBM233 module has a single 10/100Mbps 
copper Ethernet connection and a single RJ-45 
connector on the front of the module for connectivity 
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.
Key features of the FBM233 are:
 Redundant 10 Mbps or 100 Mbps Ethernet 
network transmission rate to/from field devices
 Communicates with up to 64 field devices
 I/O software driver is downloadable from a library 
of available protocols
 Up to 2000 DCI block connections
 Integrates field device data into a Foxboro Evo 
control database using Ethernet connectivity
 Field mounted
 Class G3 (harsh) environments.
I/O DRIVERS
This FBM is a generic Ethernet hardware module in 
which different software drivers can be loaded. These 
drivers configure the FBM to recognize a particular 
protocol used by the device. Several of these 
software drivers are a standard product offerings. 
Other custom drivers can be developed to meet 
specific needs. These drivers are dynamically 
downloaded to the FBM233 with software code 
specifically designed to interface with the third party 
device’s protocol. 
The configuration procedures and the software 
requirements for each driver are unique to the 
device(s) being integrated into the system.
ETHERNET LINK SETUP
Data communication between the FBM233 and field 
devices are through the RJ-45 connector located on 
the front of the FBM233 module. The RJ-45 
connector of the FBM233 can be connected through 
hubs, or through Ethernet switches to the field 
devices (refer to “ETHERNET SWITCHES FOR USE 
WITH FBM233” on page 7). The FBM233 is 
connected to Ethernet switches or hubs in order to 
communicate with one external device or up to 64 
external devices.
CONFIGURATOR
The FDSI configurator sets up the FBM233 port and 
XML based device configuration files. The port 
configurator allows for easy setup of the 
communication parameters for each port (such as, 
Dynamic Host Configuration Protocol (DHCP), 
IP addresses). The device configurator is not needed 
for all devices, but when needed it configures device 
specific and point specific considerations (such as, 
scan rate, address of the data to be transferred, and 
the amount of data to be transferred in one 
transaction).
OPERATIONS
Each FBM233 pair can access up to 64 devices to 
read or write data. 
From the Foxboro Evo control station to which the 
FBM233 is connected (refer to Figure 1), up to 2000 
Distributed Control Interface (DCI) data connections 
can be made to read or write data. Supported data 
types are determined by the particular driver loaded 
on the FBM233, which converts the data to the DCI 
data types listed below:
 An analog input or output value (integer or IEEE 
single-precision floating point)
 A single digital input or output value
 Multiple (packed) digital input or output values 
(packed in groups of up to 32 digital points per 
connection).
Thus a Foxboro Evo control station can access up to 
2000 analog I/O values, or up to 64000 digital I/O 
values, or a combination of digital and analog values 
using the FBM233. The frequency of access to the 
FBM233 data by a control station can be as fast as 
500 ms. The performance is dependant on each 
device type and the layout of data in the device.

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