FOXBORO FBM214b P0927AH Communication Input Module

Description

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FOXBORO FBM214b P0927AH Communication Input Module.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, enablingFoxboro™ DCS to request and receive two digital messages per second from the fielddevice. The message pass-through capability can be used to support HART universal,common practice, and device-specific commands, but it cannot support the burstcommunication mode. These commands are implemented using the Foxboro DCSField Device Expert for HART. For details, see Field Device Expert for HART DevicesControl and I/O (PSS 41S-10FDMHRT).

The FBM214b provides individually isolated power supplies to power each of the eightchannels.

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 CableBalun module is required to help prevent HARTcommunication channel crosstalk.

The FBM214b has a rugged extruded aluminum exterior for physical protection of thecircuits. Enclosures specially designed for mounting the Foxboro DCS FieldbusModules (FBMs) provide various levels of environmental protection, up to harshenvironments per ISA Standard S71.04.

The module mounts on a modular baseplate which accommodates up to four or eightFBMs. The modular baseplate is either DIN rail mounted or rack mounted, andincludes signal connectors for redundant fieldbus, redundant independent dc power,and termination cables.

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 20mA analog input signal

• FSK modem dedicated to each input channel for bi-directional digitalcommunications with a HART field device

• Analog to digital conversion of each of the 4 to 20 mA input signals from theHART devices

• Support for the HART universal commands necessary to interface the field devicewith 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 theFBM214b

• TA for per channel internally and/or externally loop powered transmitters