Description
Brand：Foxboro Model number： FBM214b P0927AH
Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: USA
Price: Please contact us Product weight：0.36kg
Product Dimensions：
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The FBM214b HART Communication Input Module contains eight 4 to 20 mA
individually isolated analog input channels. It supports any mix of standard 4-20 mA
devices and HART devices.
The FBM214b can serve as a HARTcommunications field device host, enabling
Foxboro™ DCS to request and receive two digital messages per second from the field
device. The message pass-through capability can be used to support HART universal,
common practice, and device-specific commands, but it cannot support the burst
communication mode. These commands are implemented using the Foxboro DCS
Field Device Expert for HART. For details, see Field Device Expert for HART Devices
Control and I/O (PSS 41S-10FDMHRT).
The FBM214b provides individually isolated power supplies to power each of the eight
channels.
Optionally, the input channels can be powered by an external power supply. However,
when a common external power supply is used with two or more channels, a Cable
Balun module is required to help prevent HARTcommunication channel crosstalk.
Features
• 8 analog input channels, each accepting one of the following inputs:
◦ Standard 4 to 20 mA analog sensor signal
◦ Digital HART Frequency Shift Keying (FSK) signal superimposed on a 4 to 20
mA analog input signal
• FSK modem dedicated to each input channel for bi-directional digital
communications with a HART field device
• Analog to digital conversion of each of the 4 to 20 mA input signals from the
HART devices
• Support for the HART universal commands necessary to interface the field device
with the Foxboro DCS database
• Per channel galvanic isolation of each of the 8 input channels from each other,
ground and module logic
• Rugged design suitable for enclosure in Class G3 (harsh) environments
• High accuracy achieved by sigma-delta data conversions for each channel
• Termination Assembly (TA) for locally or remotely connecting field wiring to the
FBM214b
• TA for per channel internally and/or externally loop powered transmitters
Standard Design
The FBM214b has a rugged extruded aluminum exterior for physical protection of the
circuits. Enclosures specially designed for mounting the Foxboro DCS Fieldbus
Modules (FBMs) provide various levels of environmental protection, up to harsh
environments per ISA Standard S71.04.
High Accuracy
For high accuracy, the module incorporates a Sigma- Delta converter which can
provide new analog input values for each channel every 100 milliseconds.
PSS 41H-2S214, Rev B 3
FBM214b, HART® Communication Input Module Overview
Visual Indicators
Light-emitting diodes (LEDs) incorporated into the front of the module provide visual
indication of the module’s operational status, and communication activity on the
channels.
Easy Removal/Replacement
The module can be removed/replaced without removing field device termination
cabling, power, or communications cabling.
Fieldbus Communication
A Fieldbus Communication Module or a Control Processor interfaces the redundant 2
Mbps module Fieldbus used by the FBMs. The FBM214b module accepts
communication from either path (A or B) of the redundant 2 Mbps fieldbus. If one path
is unsuccessful or is switched off at the system level, the module continues
communication over the active path.
The use of an external power supply common to two or more loops requires a Cable
Balun Module to maintain communication signal line balance.
Termination Assemblies
Field input signals connect to the FBM subsystem via DIN rail mounted TAs. The TA
used with the FBM214b is described in Termination Assemblies and Cables, page 12.
Configuration Tools
The Compact FBM214b provides sufficient loop resistance to allow use of the HART
Hand-Held Terminal or PC20 Intelligent Field Device Configurator (IFDC).
Modular Baseplate Mounting
The module mounts on a modular baseplate which accommodates up to four or eight
FBMs. The modular baseplate is either DIN rail mounted or rack mounted, and
includes signal connectors for redundant fieldbus, redundant independent dc power,
and termination cables.
4 PSS 41H-2S214, Rev B
Overview FBM214b, HART® Communication Input Module
Cable Balun Module
The Cable Balun module is used
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