FBM214B FOXBORO
OVERVIEW
The FBM214b HART Communication Input Modulecontains eight 4 to 20 mA individually isolated analoginput channels. It supports any mix of standard4-20 mA devices and HART devices.The FBM214b serves as a HART communicationsfield device hostenabling the Foxboro EvoM systemto request and receive two digital messages persecond from the field device.The message passthrough capability can be used to support HARTuniversal, common practice,and device-specificcommands, but not the burst communication mode.These commands are implemented using thevoIntelligent Field Device Configurator Foxcom and
The FBM214b provides individually isolated power
supplies to power each of the eight channels.
Optionally, the channels for both of these modules
can be powered by an external power supply.
However, when a common external power supply
module is required to prevent HART communication
channel crosstalk.
FEATURES
Key features of the FBM214b module are:
Eight 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.
bFSK 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 HARTuniversal commands
necessary to interface the field device with the
STANDARD DESIGN
The FBM214b has a rugged extruded aluminum
exterior for physical protection of the circuits.
Enclosures specially designed for mounting the
FBMs provide various levels of environmental
protection, up to harsh environments per ISA
Standard S71.04.
