7B47-J-01-1 [ADI]
Isolated, Linearized Thermocouple Input; 隔离，线性热电偶输入
| 型号： | 7B47-J-01-1 |
| 厂家： | 
ADI |
| 描述： | Isolated, Linearized Thermocouple Input |
| 文件： | 总8页 (文件大小：536K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Isolated, Linearized Thermocouple Input
7B47
FUNCTIONAL BLOCK DIAGRAM
FEATURES
Interfaces, amplifies and filters input voltages from a J, K, T,
E, R, S, B or N-type thermocouple.
Module provides a precision output of either +1 V to +5 V or
0 V to +10 V, linear with input temperature.
All 7B47 series modules are mix-and-match and Hot
Swappable.
APPLICATIONS
Industrial signal conditioning
Industrial signal isolation
Industrial signal filtering
Figure 1. 7B47 Functional Block Diagram
The modules feature a maximum nonlinearity of +0.02% and
are factory calibrated to guarantee a maximum accuracy
specification of +0.1%.
PRODUCT OVERVIEW
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 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 -40oC to
+85oC industrial temperature range. All 7B Series modules are
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.
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.
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
Fax: 781.326.8703
www.analog.com
© 2004 Analog Devices, Inc. All rights reserved.
7B47
GENERAL DESCRIPTION
input temperature range. A current source provides the upscale
open circuit indication. Amplitude modulation is used to
implement transformer isolation (1500) V rms input-to-output
and power). Isolated front-end circuitry power is supplied by a
DC/DC converter. The output section contains a demodulator,
linearizer. A two-pole low pass filter (-3 dB @ 3 Hz), a buffer
amplifier and a power oscillator. The two-pole output filter and
subsequent buffer ensures that a low noise, low impedance
(<1Ω) signal is available at the output to drive loads down to 2
kΩ .
The 7B47 is a single-channel signal conditioning module that
interfaces, amplifies and filters input voltages from a J, K, T, E, R,
S, B, or N-type thermocouple and provides an isolated and
protected precision output of either +1V to +5V or 0 to +10 V,
linear with input temperature. High accuracy internal cold
junction compensation and a predictable upscale open circuit
indication provide a complete signal conditioning solution. To
accurately measure low level signals in electrically noisy
environments, 1500 V rms of galvanic transformer-based
isolation with a common mode rejection (CMR) of 160 of 160
dB @ 50/60 Hz and a normal mode rejection (NMR) of 60 dB @
50/60 Hz are provided. Rated to operate with a nominal +24
VDC supply, Model 7B47 is mix-and-match and hot-swappable
with other 7B Series input modules, so it can be inserted or
removed from any socket in the same backplane without
disturbing system power.
The three input pins of model 7B47 are fully protected up to
120 V rms line voltages. A one-pole 3 Hz filter preconditions the
thermocouple signal prior to amplification, provided by a low
drift input amplifier. Cold junction compensation (CJC) is
implemented using a thermistor temperature sensor embedded
under the input screw terminal block on a 7B Series backplane.
A voltage reference source acts to offset the thermocouple
signal in accordance with the specified lower bound on the
Figure 2
Rev. 0 | Page 2 of 8
7B47
7B47 Models Available
Model
Input Type
Input Range
Output Range
Accuracy1
(Typical)
Accuracy1
(Maximum)
±0.38% Span
±0.32% Span
±0.35% Span
±0.30% Span
±0.35% Span
±0.32% Span
±0.20% Span
±0.18% Span
±0.05% Span
±0.38% Span
±0.57% Span
±0.47% Span
±0.41% Span
±0.34% Span
±0.36% Span
±0.30% Span
±0.31% Span
±0.25% Span
±0.41% Span
±0.35% Span
±0.31% Span
±0.27% Span
7B47-J-01-1
7B47-J-01-2
7B47-J-02-1
7B47-J-02-2
7B47-K-03-1
7B47-K-03-2
7B47-K-04-1
7B47-K-04-2
7B47-T-05-1
7B47-T-05-2
7B47-T-06-1
7B47-T-06-2
7B47-E-07-1
7B47-E-07-2
7B47-R-08-1
7B47-R-08-2
7B47-S-09-1
7B47-S-09-2
7B47-B-10-1
7B47-B-10-2
7B47-N-11-1
7B47-N-11-2
Type J
0°C to +760°C (+32°F to +1400°F)
0°C to +760°C (+32°F to +1400°F)
-100°C to +300°C (-148°F to +572°F)
-100°C to +300°C (-148°F to +572°F)
0°C to +1300°C (+32°F to +2372°F)
0°C to +1300°C (+32°F to +2372°F)
0°C to +600°C (-148°F to +1112°F)
0°C to +600°C (-148°F to +1112°F)
0°C to +400°C (+32°F to +752°F)
+1 V to +5 V
0 V to +10 V
+1 V to +5 V
0 V to +10 V
+1 V to +5 V
0 V to +10 V
+1 V to +5 V
0 V to +10 V
+1 V to +5 V
0 V to +10 V
+1 V to +5 V
0 V to +10 V
+1 V to +5 V
0 V to +10 V
+1 V to +5 V
0 V to +10 V
+1 V to +5 V
0 V to +10 V
+1 V to +5 V
0 V to +10 V
+1 V to +5 V
0 V to +10 V
±0.15% Span
±0.13% Span
±0.16% Span
±0.14% Span
±0.15% Span
±0.15% Span
±0.09% Span
±0.08% Span
±0.24% Span
±0.19% Span
±0.29% Span
±0.25% Span
±0.18% Span
±0.15% Span
±0.29% Span
±0.25% Span
±0.13% Span
±0.11% Span
±0.19% Span
±0.17% Span
±0.14% Span
±0.09% Span
Type J
Type J
Type J
Type K
Type K
Type K
Type K
Type T
Type T
Type T
Type T
Type E
Type E
Type R
Type R
Type S
Type S
Type B
Type B
Type N
Type N
0°C to +400°C (+32°F to +752°F)
-100°C to +200°C (-148°F to +392°F)
-100°C to +200°C (-148°F to +392°F)
0°C to +900°C (+32°F to +1652°F)
0°C to +900°C (+32°F to +1652°F)
+500°C to +1750°C (+932°F to +3182°F)
+500°C to +1750°C (+932°F to +3182°F)
+700°C to +1750°C (+1292°F to +3182°F)
+700°C to +1750°C (+1292°F to +3182°F)
+800°C to +1800°C (+1472°F to +3272°F)
+800°C to +1800°C (+1472°F to +3272°F)
+200°C to +1300°C (+392°F to +2372°F)
+200°C to +1300°C (+392°F to +2372°F)
1 Accuracy includes the effects of repeatability, hysteresis and conformity. The CJC sensor accuracy should be added to the 7B47 module accuracy listed in these tables in order to
compute the overall system accuracy.
Rev. 0 | Page 3 of 8
7B47
7B47 Specifications
(typical @ +23°C ±5°C and Vs = +24 V dc)
Description
Model 7B47
Input Ranges
J, K, T, E, R, S, B, N
Thermocouple Types
Standard Temperature Ranges
Custom Ranges
Refer to Model Table
Not Available*
+1 V to +5 V or 0 V to +10 V
Output Range Options (RL > 2 kΩ)
Accuracy1
Initial @ +25°C
Refer to Model Table
±0.5 µV/°C
Input Offset vs. Temperature
Zero Suppression vs. Temperature
Span vs. Temperature
±0.005% (Vz)3/°C
±40 ppm/°C
Output Offset vs. Temperature
±0.002% Span/°C
Cold Junction Compensation
±1.0°C, maximum
+25 nA
Accuracy4, over +5°C to +45°C ambient
Input Bias Current
Input Resistance
10 MΩ
Power ON
Power OFF
30 kΩ, minimum
Output Noise
7 mV peak
5 MHz Bandwidth
10 Hz to 100 kHz Bandwidth
0.1 Hz to 10 Hz Bandwidth
Bandwidth, -3 dB
1 mV rms
0.5 µV peak
3 Hz
Output Rise Time, 10% to 90% Span
150 ms
Common-Mode Voltage (CMV)
1500 V rms, continuous
Common Mode Rejection (CMR)
160 dB
Input-to-Output and Power
Input-to-Output and Power @ 50/60 Hz
Normal Mode Rejection @ 50/60 Hz
Input Protection
60 dB
120 V rms, continuous
±35 V dc, continuous
Input Transient Protection
ANSI/IEEE C376.90.1-1989
IEEE-STD 472
IEC 255-4, Class II
Output Resistance
< 1 Ω
Voltage Output Protection
Continuous Short to Ground
Power Supply
Voltage Range, Operating
+14 V dc to +35 V dc
Rev. 0 | Page 4 of 8
7B47
Current
+25 mA, maximum
±0.0001%/% of Vs
Sensitivity
Mechanical Dimensions
1.663" x 2.11" x 0.563"
(42.24 mm x 53.6 mm x 14.3 mm)
Weight
60 grams
Environmental
Temperature Range
Operating
-40°C to +85°C
Storage
-40°C to +85°C
Relative Humidity, 24 hours
ESD Sensitivity
RFI Susceptibility
0 to 90% @ +60°C non-condensing
IEC 801-2, Level 2
±0.5% Span error @ 400 MHz, 5 Watt, 3 ft
Warm-up time required to meet specifications is approximately 10 minutes.
* Contact factory for OEM requirements.
1Includes the combined effects of repeatability, hysteresis, and nonlinearity.
2Nonlinearity is calculated using best-fit straight line method.
3When used with the CJC temperature sensor provided an each
channel of 7B Series backplanes.
Specifications subject to change without notice.
Rev. 0 | Page 5 of 8
7B47
PIN CONFIGURATIONS AND FUNCTIONAL DESCRIPTIONS
Figure 3 7B47 Input Field Connections
Table 1. Pin Function Descriptions—
Pin
No.
Input Module Function
Output Module Function
0
1
2
3
4
5
SENSOR INPUT
INPUT HIGH
NOT USED
OUTPUT HIGH
OUTPUT LOW
POWER SUPPLY (DC)
INPUT VOLTAGE
INPUT LOW
POWER SUPPLY (DC)
OUTPUT VOLTAGE
OUTPUT & POWER
COMMON
INPUT AND POWER
COMMON
Figure 4 . Model 7B Series Module, with pin-out assignments.
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.
Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
Rev. 0 | Page 6 of 8
7B47
OUTLINE DIMENSIONS
Figure 5. Outline Dimensions
Rev. 0 | Page 7 of 8
7B47
NOTES
©
2004 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective companies.
D05182-0-10/04(0)
Rev. 0 | Page 8 of 8
相关型号：
©2020 ICPDF网 联系我们和版权申明