Foxboro FBM10 Input Interface Module

The FBM233 Redundant Field Device System Integrator (FDSI) module

provides an Ethernet interface between single- or dual-port field I/O devices

and the EcoStruxure™ Foxboro™ DCS.

Each FBM233 module has an RJ-45 connector (10/100Mbps copper

Ethernet connection) on the front of the module for connecting dual-port

Ethernet devices.

The FBM233 connects to an Ethernet switch or hub to communicate with one

external device or up to 64 external devices.

The combination of a pair of modules provides redundancy at the fieldbus

module (FBM) level. In this configuration, one FBM233 is the master and the

other is the tracking module. Input points on the control station are updated

from device input points received on the network connected to the master.

Device output points (depending on the I/O driver) are written by both the

master and the trace module.

If the I/O driver detects a problem (e.g. any device loses its heartbeat), a role

switch is automatically performed, or the user can switch roles at any time via

the SMDH.

Functional Features

Key features of the FBM233 include

- Redundant 10 Mbps or 100 Mbps Ethernet network transfer rates to and from field devices

- Communication with up to 64 field devices

- Downloadable I/O software drivers from available protocol libraries

- Up to 2000 DCI block connections

- Integration of field device data into the Foxboro DCS control database using an Ethernet connection

- Field Installation

- G3 rated (harsh) environments.

Enhanced reliability (fault tolerance)

The FCP280's unique, patented fault-tolerant operation improves 

reliability compared to traditional process controllers.

The fault-tolerant version of the FCP280 consists of two modules operating

 in parallel with two Ethernet connections to the control network.

The two FCP280 modules are combined as a fault-tolerant pair,

ensuring continuous operation of the controller in the event of any hardware

failure in one of the modules. Both modules receive and process information

simultaneously and faults are detected by the modules themselves.

One important method of fault detection is to compare the communication

messages of the modules' external interfaces.

A message leaves the FCP280 only if the two FCP280s agree on the message

to be sent (bit for bit match). Once a fault is detected, both modules run

self-diagnostics to determine which module is affected.

The modules run self-diagnostics to determine which module is affected. 

The unaffected module then takes over control without affecting the normal

operation of the system.

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