Foxboro FBM204, 0 to 20 mA I/O Module

 Product Details:

FBM204 Datasheet.PDF

The FBM204, 0 to 20 mA Input/Output contains four 20 mA dc analog input channels and four 20 mA dc analog output channels.

Each input channel accepts an analog sensor input such as a 4 to 20 mA transmitter, or a self-powered 20 mA source. Each output channel drives an external load and produces a 0 to 20 mA output. 

The inputs/outputs are galvanically isolated from other channels and ground.

The FBM204 performs the signal conversion required to interface the electrical input/ output signals from the field sensors to the optionally redundant fieldbus. 

The FBM204 executes the Analog I/O application program, which provides the following configurable options: Conversion Time, Fail-Safe Configuration (Hold/Fallback), and

Analog Output Fail-Safe Fallback Data (on a per channel basis). 

The Fieldbus Module (FBM) may instead execute a distributed PIDA (DPIDA) application program to provide a fast control loop running in it.

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

• Rugged design suitable for enclosure in Class G3 (harsh) environments

• Execution of an analog I/O application program that provides conversion time and configurable options for Rate of Change Limits

• High accuracy achieved by sigma-delta data conversions for each channel

• Termination Assemblies (TAs) for locally or remotely connecting field wiring to the Compact FBM204

• TA for use with Output Bypass Station to maintain outputs during maintenance operations

• 3-tier termination assembly for per channel internally and/or externally loop powered transmitters

• Support for DPIDA control blocks