FOXBORO RH916XG

Description

FOXBORO RH916XG
 High accuracy achieved by sigma-delta data
conversions for each channel
 Termination Assemblies (TAs) for locally or
remotely connecting field wiring to the Compact
FBM201 module
 Termination Assemblies for per channel internally
and/or externally loop powered transmitters.
COMPACT DESIGN
The Compact FBM201’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 provide
various levels of environmental protection, up to
harsh environments per ISA Standard S71.04.
HIGH ACCURACY
For high accuracy, the modules incorporate sigmadelta data conversion on a per-channel basis, which
can provide a new analog input reading every 25 ms,
and a configurable integration period to remove any
process noise and power-line frequency noise.
Each time period, the FBM converts each analog
input to a digital value, averages these values over
the time period, and provides the averaged value to
the controller.
VISUAL INDICATORS
Red and green light-emitting diodes (LEDs)
incorporated into the front of the module provide
visual status indications of the FBM operational
status.
EASY REMOVAL/REPLACEMENT
The module mounts on a Compact 200 Series
baseplate. Two screws on the FBM secure the
module to the baseplate.
The module can be removed/replaced without
removing field device termination cabling, power, or
communication cabling.
TERMINATION ASSEMBLIES
Field I/O signals connect to the FBM subsystem via
DIN rail mounted TAs. The TAs used with the
Compact FBM201 modules are described in
“TERMINATION ASSEMBLIES AND CABLES” on
page 7.

Process I/O Communications
Communicates with its associated FCM or FCP via
the redundant 2 Mbps module Fieldbus.
Input Channels
8 isolated and independent channels
Input Range (each channel)
0 to 20 mA dc
Input Channels (8)
ANALOG ACCURACY (INCLUDES LINEARITY)
±0.03% of span
Accuracy temperature coefficient: ±50 ppm/ºC
FIELD DEVICE CABLING DISTANCE
Maximum distance of the field device from the
FBM is a function of compliance voltage
(22.8 V dc), wire resistance, and voltage drop at
the field device.
INPUT CHANNEL IMPEDANCE
61.5 Ω nominal
INPUT SIGNAL A/D CONVERSION
Each channel performs A/D signal conversion
using an independent Sigma-Delta converter.
INTEGRATION PERIOD
Software configurable.
COMMON MODE REJECTION
>100 db at 50 or 60 Hz
NORMAL MODE REJECTION
>95 db at 50 or 60 Hz