Foxboro FBM204 Interface Module
OVERVIEW
The FBM204.0 to 20 mA Input/Output consists of four 20 mA dc analog input channels and four 20 mA dc analog output channels.
Each input channel accepts an analog sensor input or a self-powered 20 mA supply.
Each output channel drives an external load to produce a 0 to 20 mA output.
The inputs/outputs are electrically isolated from other inputs/outputs on channel and ground.
The FBM204 performs the signal conversion required for electrical input interfaces/output signals from field sensors to an optional redundant fieldbus.
The FBM204 performs analog I/O applications that provide configurable options for the following functions: conversion time,
Fail Safe Configuration (Hold/Return) and Analog Output Fail Safe Return Data (on a per channel basis).
The Fieldbus Module (FBM) can alternatively perform the fast control loops in which Distributed PIDA (DPIDA) applications provide operation.
The FBM204 is electrically compatible with standard HART signals.
Features
-Four 20 mA dc analog input channels
-Four 20 mA dc analog output channels
-Each input and output channel is galvanically isolated
-Ruggedized design for use in Class G3 (harsh) environment enclosures
-Performs analog I/O applications with configurable options for conversion time and change rate limits
-High accuracy through sigma-delta data conversion per channel
-Terminal assembly (TA) for local or remote connection of field wiring to the compact FBM204
-TA for output bypass station to maintain output operation during maintenance
3-tier terminal assembly power transmitter with internal and/or external loops for each channel
-Supports DPIDA control block with high accuracy