FBM203 Platinum/Nickel/Copper RTD Input Modules FOXBORO

Description

Overview

Essential details：FBM203 Platinum/Nickel/Copper RTD Input Modules FOXBORO

Products Description

The Compact FBM203/c/d Platinum/Nickel/Copper RTD Input Interface Modules contain eight resistance temperature detector (RTD) input channels. Each input channel of the Compact FBM203/c modules accepts a 2- or 3-wire RTD sensor input, within a 0 to 320 ohm (FBM203), or 0 to 30 ohm (FBM203c) resistance range. Each input channel of the Compact FBM203d accepts a 4-wire RTD sensor input, within a 0 to 320 ohm resistance range. Each analog input is galvanically isolated from other channels and ground. It is part of the Compact 200 Series I/O subsystem described in Compact 200 Series I/O Subsystem Overview (PSS 41H-2COV).
The modules perform the signal conversion required to interface the electrical input signals from the field sensors to the optionally redundant fieldbus. The Compact FBM203/c/d modules execute an analog input application program, which provides conversion time (on a per module basis) and configurable options for Rate of Change Limits. TAs are available for FBM203c, which support the functionality of the 100 Series FBM33A when used with a 3-wire RTD input. TAs are available for FBM203d, which support the functionality of the 100 Series FBM03B or FBM33B when used with a 2-wire or 4-wire RTD input.

FBM203

Features
• 8 resistance temperature detector (RTD) input channels
• Each analog input is galvanically isolated
• Compact, rugged design suitable for enclosure in Class G3 (harsh) environments
• Execution of an analog input 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 FBM203/c/d
High Accuracy
For high accuracy, each channel incorporates a Sigma-Delta converter which can provide new analog input values for each channel every 25 ms, and a configurable integration period to remove any process noise and power line frequencies. Each time period, the Fieldbus Module (FBM) converts each analog input to a digital value, averages these values over the time period, and provides the averaged value to the controller.
Compact Design
The Compact FBM203/c/d’s design is narrower than the standard 200 Series FBMs. It has a rugged Acrylonitrile Butadiene Styrene (ABS) exterior for physical protection of the circuits. Enclosures specially designed for mounting the FBMs can provide various levels of environmental protection, up to harsh environments, per ISA Standard S71.04.

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