7B27 AD [Analog Devices], 7B27 Datasheet

7B27

Manufacturer Part Number

7B27

Description

Isolated Thermocouple Input

Manufacturer

AD [Analog Devices]

Datasheet

1.7B27.pdf (8 pages)

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FEATURES

Interfaces, amplifies and filters input voltages from a J, K, T,

E, R, S or B-type thermocouple.

Provides an isolated and protected precision output of

either +1 V to +5 V or 0 V to +10 V.

Operates with a nominal +24 VDC supply.

All 7B27 series modules are mix-and-match and Hot

Swappable.

APPLICATIONS

Industrial signal conditioning

Industrial signal isolation

Industrial signal filtering

PRODUCT OVERVIEW

The 7B Series of signal conditioners feature small size, low cost

and a wide output voltage range for a variety of applications

including process control and factory-floor environments. The

single-channel 7B modules accept inputs from a range of

transducers and are fully rated over the extended -40

+85

rated for a nominal power supply input of +24 VDC; and, for

maximum flexibility, they will accept supply voltages in the +14

VDC to +35 VDC range. The input modules, with the exception

of the 7B21, provide a high-level output voltage that is factory

configured for either the +1 V to +5 V or 0 V to +10 V range.

The 7B21 is a unity gain, isolated input module with an

input/output range of +10V. Output modules are available that

provide either isolated process current or isolated bipolar

voltage output. Model 7B39 converts either a +1 V to +5 V input

to a 4 to 20 mA output or a 0 V to +10 V input to a 0-20 mA

output. The input/output ranges of the 7B39 are factory

configured. The 7B22 is a unity gain module that provides an

isolated +10V output signal. All modules have a universal pin-

out and may be readily hot-swapped under full power without

disrupting field wiring. Each module accepts analog transducer

signals and transfers them to a process control or factory data

collection system without the inherent noise, non-linearity, drift

and extraneous voltages which frequently accompany the

signals.

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.

C industrial temperature range. All 7B Series modules are

C to

The modules feature a maximum nonlinearity of +0.02% and

are factory calibrated to guarantee a maximum accuracy

specification of +0.1%.

The 7B Series offers up to 1500 V rms continuous common

mode voltage isolation and 120 V rms of field wiring input

protection. The power supplies necessary to drive each of the

individual module’s input circuitry are internally isolated,

enabling the 7B Series modules to offer true channel-to-channel

isolation of the input signals.

The modules directly accept analog signals from

thermocouples, RTDs, current loop powered transmitters, and

other process control signals. The 7B Series modules amplify,

linearize, isolate, protect and convert the transducer output

signals to standardized analog inputs for high-level analog I/O

subsystems. The 7B Series Subsystem consists of 19-inch rack-

compatible hardware (model AC 1363), with universal

mounting backplane and a family of plug-in (up to 16 per

backplane) input and output signal conditioning modules. Four-

, eight-, and sixteen-channel backplanes are available. Each

backplane incorporates screw terminals for easy power

connections and field wiring, and includes a 25-pin D-type

connector for interfacing the high-level single-ended voltage

outputs to the user’s equipment. Gold-plated sockets are

provided on each channel of the backplane to ensure the

reliability of each module’s electrical connection.

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

Tel: 781.329.4700

Fax: 781.326.8703

Isolated Thermocouple Input

FUNCTIONAL BLOCK DIAGRAM

Figure 1. 7B27 Functional Block Diagram

www.analog.com

7B27

Related parts for 7B27

7B27 Summary of contents

Page 1

... Interfaces, amplifies and filters input voltages from B-type thermocouple. Provides an isolated and protected precision output of either + +10 V. Operates with a nominal +24 VDC supply. All 7B27 series modules are mix-and-match and Hot Swappable. APPLICATIONS Industrial signal conditioning Industrial signal isolation ...

Page 2

... Model 7B27 is rated to operate with a nominal +24 VDC supply. The three input pins of Model 7B27 are protected up to +30 VDC. A one-pole 3 Hz filter preconditions the thermocouple signal prior to amplification, provided by a low drift input amplifier ...

Page 3

... Models Available Model Input Type 7B27-J-01-1 Type J 7B27-J-01-2 Type J 7B27-J-10-1 Type J 7B27-J-10-2 Type J 7B27-J-11-1 Type J 7B27-J-11-2 Type J 7B27-J-12-1 Type J 7B27-J-12-2 Type J 7B27-J-13-1 Type J 7B27-J-13-2 Type J 7B27-K-02-1 Type K 7B27-K-02-2 Type K 7B27-K-20-1 Type K 7B27-K-20-2 Type K 7B27-K-21-1 Type K 7B27-K-21-2 Type K 7B27-K-22-1 Type K 7B27-K-22-2 ...

Page 4

... Specifications (typical @ +23°C ±5°C and V Description Input Ranges Thermocouple Types Standard Temperature Ranges Custom Ranges Output Range Options (R > 2 kΩ) L Initial @ +25°C 2 Nonlinearity Input Offset vs. Temperature Zero Suppression vs. Temperature Span vs. Temperature Output Offset vs. Temperature Cold Junction Compensation 4 Accuracy over +5° ...

Page 5

... When used with the CJC temperature sensor provided on each channel of 7B Series Backplanes. Specifications subject to change without notice. +25 mA, maximum ±0.0001%/% of Vs 1.663" x 2.11" x 0.563"(42. 53 14.3 mm) Environmental -40°C to +85°C -40°C to +85° 90% @ +60°C non-condensing IEC 801-2, Level 2 ±0.5% Span error @ 400 MHz, 5 Watt Rev Page 7B27 ...

Page 6

... PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS Figure 3 7B27 Input Field Connections Table 1. Pin Function Descriptions— Pin Input Module Function Output Module Function No. 0 SENSOR INPUT NOT USED 1 INPUT HIGH OUTPUT HIGH 2 INPUT LOW OUTPUT LOW 3 POWER SUPPLY (DC) POWER SUPPLY (DC) 4 OUTPUT VOLTAGE ...

Page 7

... OUTLINE DIMENSIONS Figure 5. Outline Dimensions Rev Page 7B27 ...

Page 8

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