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Analog Devices - AC Strain Gage

Numéro de référence 3B20
Description AC Strain Gage
Fabricant Analog Devices 
Logo Analog Devices 





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3B20 fiche technique
AC Strain Gage, Torque Transducer Input
3B20
FEATURES
Interfaces, amplifies, & filters signals from 4-arm AC bridge
transducer signals ranging between 1.5mV rms & 150mV
rms.
Module provides an AC excitation voltage of 2V rms to 10V
rms at frequencies between 1kHz & 10kHz..
Module provides simultaneous precision voltage and
current outputs.
Module circuitry can withstand 130v rms at its current
output terminals without damage.
All 3B20 series modules are mix-and-match and Hot
Swappable
APPLICATIONS
Industrial signal conditioning
Industrial signal isolation
Industrial signal filtering
FUNCTIONAL BLOCK DIAGRAM
Figure 1. 3B20 Functional Block Diagram
Output modules accept 0 to +10V (or +10V) single-ended
signals and provide an isolated 4-20 mA (or 0-20 mA) process
signal. All modules feature a universal pin-out and may be
readily hot-swapped under full power and interchanged without
disrupting field wiring.
PRODUCT OVERVIEW
The Analog Devices 3B Series Signal Conditioning Subsystem is
designed to easily handle signal conditioning problems in
The 3B Series of Signal Conditioning I/o Subsystems provide a
measurement and control applications. Some typical uses are in
low-cost, versatile method of transferring analog transducerwww.DataSheet4U.commicrocomputer-based data acquisition systems, programmable
signals to a data acquisition, monitoring or control system
controllers, analog recorders, dedicated control systems, and any
without the inherent noise, non-linearity, drift and extraneous
other applications where monitoring of temperature, pressure,
voltages. The modules are designed to directly accept analog
flow and analog signals are required. Since each input module
signals from Thermocouples, RTD’s, AC and DC Strain Gages,
features two simultaneous outputs, the voltage output can be
Torque Transducers, Frequency Transducers, LVDTs, millivolt
used to provide an input to a microprocessor-based data
or process current signals. The modules amplify, isolate,
acquisition or control system while the current output can be
linearize and convert the transducer output signals to
used for analog transmission, operator interface, or an analog
standardized analog inputs for high-level analog I/O
backup system.
subsystems. The 3B Series Subsystem consists of a 10” relay
rack with universal mounting backplane and a family of plug-in
(up to 16 per rack) input and output signal conditioning
modules.
Each input module is a single-channel signal conditioner which
plugs into a socket on the backplane and accepts its signal from
the input screw terminals. All input modules provide input
protection, amplification and filtering of the input signal,
Eight and four channel backplanes are also available. Each
backplane incorporates screw terminals for sensor inputs and
current outputs and a 26-pin connector for high-level single-
ended voltage outputs to the user’s equipment.
accuracy of +0.1%, low drift of +1 uV/oC (low-level input
modules), and feature two high-level analog outputs that are
compatible with most process instrumentation. The isolated
input modules also provide +1500 V peak isolation.
The input modules feature complete signal conditioning
circuitry optimized for specific sensors or analog signals and
provide two simultaneous high-level analog outputs: 0 to +10V
(or +10V) and 4-20 mA (or 0-20 mA).
The choice of a specific 3B module depends upon the type of
input signal. Input modules are available to accept millivolt, volt,
process current, thermocouple, RTD, AC and DC strain gage,
frequency and LVDT inputs. The voltage output of each module
is available from the system I/O connector while the current
output is available on the output screw terminals.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.

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