3B47_15 datasheet, PDF - EEWORLD Datasheet

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3B47_15: DescriptionIsolated, Linearized, Thermocouple Input; File Size343KB，8 Pages; ManufacturerADI; Websitehttps://www.analog.com

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3B47_15 Overview

Isolated, Linearized, Thermocouple Input

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Isolated, Linearized, Thermocouple Input

3B47

FEATURES

Interfaces, amplifies, filters, isolates, & linearizes analog

input voltages from a J, K, T, E, R, S or B-type thermocouple

Thermocouple input signal is internally linearized

High accuracy internal cold junction compensation.

Module provides +1500 V peak of galvanic transformer-

based isolation with a common mode rejection (CMR) of 160

dB @ 50/60 Hz and a normal mode rejection (NMR) of 60 dB

@ 50/60 Hz.

All 3B47 series modules are mix-and-match and Hot

Swappable.

FUNCTIONAL BLOCK DIAGRAM

Figure 1. 3B47 Functional Block Diagram

APPLICATIONS

Industrial signal conditioning

Industrial signal isolation

Industrial signal filtering

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/

C (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 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.

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

www.analog.com

Tel: 781.329.4700

Fax: 781.326.8703

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