FBM214 FOXBORO
The FBM214 HART communication input interface module contains eight 4 to 20 mA isolated analog input channels. FBM214 supports any combination of standard 4 to 20 mA devices and HART devices.
FBM214 is used as a host for HART communication field devices, enabling the I/A Series system to operate per second
Request and receive two digital messages from on-site devices. The messaging function can be used to support HART universal, universal practices, and device specific commands,
But it does not support burst communication mode. These commands are implemented using the intelligent field device configurator
FBM214 provides a common isolated power supply to power all eight channels. Optionally, the channel can be powered by an external power source
。 However, when two or more channels use a common external power supply, a Cable Balun module is required to prevent channel crosstalk
The FBM214 has a compact design and a sturdy extruded aluminum casing, providing physical protection for the circuit. The casing designed specifically for installing FBM provides various levels of environmental protection, up to the harsh environment specified in ISA standard S71.04.
Fieldbus communication module
The redundant 2 Mbps module fieldbus used for connecting the FBM to the fieldbus communication module or control processor. FBM214 module
Accepts communication from any path (A or B) of the redundant 2 Mbps fieldbus – if one path fails or switches at the system level, the module will continue to communicate through the active path. Using an external power supply shared by two or more loops requires a cable balun module to maintain communication signal line balance.
Main features
Eight analog input channels,each receiving
One of the following inputs:
Standard 4 to 20 mA analog sensor signal
A digital HART frequency shift keying(FSK)signal superimposed on a 4 to 20 mA analog input signal.
The FSK modem is dedicated to each input channel for bidirectional digital communication with HART field devices
Analog to digital conversion of each 4 to 20 mA input signal from a HART device
Support for integrating on-site devices with I/A Series®The necessary HART universal commands for connecting the system database
Current isolation between 8 input channel groups and ground and module logic
