3b18-custom Analog Devices, Inc., 3b18-custom Datasheet

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3b18-custom

Manufacturer Part Number
3b18-custom
Description
Wide Bandwidth Strain Gage Input
Manufacturer
Analog Devices, Inc.
Datasheet
FEATURES
Wideband (20 kHz) single-channel signal conditioning
module.
Module Bandwidth is user-selectable between 20 kHz and
100Hz, with user-supplied filter caps installed in the optional
AC1310 ranging card.
Interfaces, amplifies, and filters signals from balanced 4-arm
full-bridge strain-gage bridges.
Module provides simultaneous precision voltage and
current outputs.
Module circuitry can withstand 130v rms at the input screw-
terminals
All 3B18 series modules are mix-and-match and Hot
Swappable
APPLICATIONS
Industrial signal conditioning
Industrial signal isolation
Industrial signal filtering
PRODUCT OVERVIEW
The 3B Series of Signal Conditioning I/o Subsystems provide a
low-cost, versatile method of transferring analog transducer
signals to a data acquisition, monitoring or control system
without the inherent noise, non-linearity, drift and extraneous
voltages. The modules are designed to directly accept analog
signals from Thermocouples, RTD’s, AC and DC Strain Gages,
Torque Transducers, Frequency Transducers, LVDTs, millivolt
or process current signals. The modules amplify, isolate,
linearize and convert the transducer output signals to
standardized analog inputs for high-level analog I/O
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.
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.
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).
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.
Wide Bandwidth Strain Gage Input
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.
The Analog Devices 3B Series Signal Conditioning Subsystem is
designed to easily handle signal conditioning problems in
measurement and control applications. Some typical uses are in
microcomputer-based data acquisition systems, programmable
controllers, analog recorders, dedicated control systems, and any
other applications where monitoring of temperature, pressure,
flow and analog signals are required. Since each input module
features two simultaneous outputs, the voltage output can be
used to provide an input to a microprocessor-based data
acquisition or control system while the current output can be
used for analog transmission, operator interface, or an analog
backup system.
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,
accuracy of +0.1%, low drift of +1 uV/
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 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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
FUNCTIONAL BLOCK DIAGRAM
Figure 1. 3B18 Functional Block Diagram
© 2004 Analog Devices, Inc. All rights reserved.
o
C (low-level input
www.analog.com
3B18

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3b18-custom Summary of contents

Page 1

... Interfaces, amplifies, and filters signals from balanced 4-arm full-bridge strain-gage bridges. Module provides simultaneous precision voltage and current outputs. Module circuitry can withstand 130v rms at the input screw- terminals All 3B18 series modules are mix-and-match and Hot Swappable APPLICATIONS Industrial signal conditioning Industrial signal isolation Industrial signal filtering ...

Page 2

... A chopper-stabilized low-drift (+1uV/ assures long-term stability. For user convenience, the zero and span can be factory configured to meet custom range needs (Model 3B18-CUSTOM) or can be externally programmed (Model 3B18-00) via user supplied resistors inserted in the optional AC1310 plug-on ranging card. Figure 2 Rev ...

Page 3

... Full Bridge 3B18-01 Full Bridge 3B18-02 Full Bridge 3B18-Custom Full Bridge 1 Output current range may be user programmed using jumper supplied. 2 Requires AC1310 ranging card. * Custom Input/Output ranges are available. Refer to configuration guide. 3B18 Specifications (typical @ +25°C and ±15 V dc, and + Power) ...

Page 4

... With respect to the voltage output wide range of custom zero suppression and span is available with the 3B18-00 model, using the AC1310 ranging card loop power is required for driving the current output at loads up to 850 voltage output is used, loop power is not required. ...

Page 5

... PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS Figure 3 3B18 Input Field Connections Table 1. Pin Function Descriptions— Pin No. Description 1 +EXC -EXC ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...

Page 6

... OUTLINE DIMENSIONS Figure 5. Outline Dimensions Rev Page 3B18 ...

Page 7

... NOTES Rev Page 3B18 ...

Page 8

... NOTES © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective companies. D05091-0-9/04(0) Rev Page 3B18 ...

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