Linearized Thermocouple Input Modules

DI-8B47 Linearized Thermocouple Input Modules FEATURES • Interfaces to Types J, K and T • Linearizes Thermocouple Signal • High Level Voltage Outputs • 1500Vrms Transformer Isolation • ANSI/IEEE C37.90.1 • Input Protected to 240VAC Continuous • 120dB CMR • 70dB NMR at 60Hz • Low Drift with Ambient Temperature • Accurate CJC -40°C to +85°C • CSA, FM, and CE Certifications Pending • Mix and Match Module Types SPECIFICATIONS Input Range Input Bias Current Input Resistance Typical at TA = +25ºC and +5V Power DI-8B47 -0.1V to +0.5V -25nA Normal Power Off Overload Continuous Transient 50MΩ 450kΩ 450kΩ 240VAC ANSI/IEEE C37.90.1 0.25mA ±0.02˚C/Ω¹ 1500Vrms max ANSI/IEEE C37.90.1 120dB 70dB at 60Hz See Ordering Information on Page 2 ±20ppm/ºC ±75ppm/ºC 250µVrms 3Hz 150ms 0 to +5V Continuous Short to Ground ANSI/IEEE C37.90.1 ±0.5ºC ±1.5ºC +5VDC ±5% 30mA ±25ppm/% 1.11" × 1.65" × 0.40" (28.1mm × 41.9mm × 10.2mm) -40ºC to +85ºC -40ºC to +85ºC 0 to 95% Noncondensing Input Protection Sensor Excitation Current Lead Resistance Effect CMV, Input to Output Transient, Input to Output CMR (50Hz or 60Hz) NMR Accuracy Stability Noise DI-8B modules are an optimal solution for monitoring real-world process signals and providing high level signals to a data acquisition system. Each DI-8B47 module isolates, filters, amplifies, and linearizes a single channel of temperature input from www.DataSheet4U.com a thermocouple and provides an analog voltage output. Linearization is accomplished using a four breakpoint piecewise linear approximation. The DI-8B47 can interface to industry standard thermocouple type J, K, and T and has an output signal of 0V to +5V. Each module is cold-junction compensated to correct for parasitic thermocouples formed by the thermocouple wire and screw terminals on the mounting backpanel. Upscale open thermocouple detect is provided by an internal pull-up resistor. Signal filtering is accomplished with a three-pole filter optimized for time and frequency response which provides 70dB of normal-mode-rejection at 60Hz. One pole of this filter is on the field side of the isolation barrier for anti-aliasing, and the other two are on the system side. A special input circuit on the DI-8B47 module provides protection against accidental connection of power-line voltages up to 240VAC. The modules are designed for installation in Class I, Division 2 hazardous locations and have a high level of immunity to environmental noise. DESCRIPTION Offset Gain Output, 100kHz Transient Cold Junction Compensation Accuracy, 25ºC Accuracy, -40ºC to +85ºC Power Supply Voltage Power Supply Current Power Supply Sensitivity Mechanical Dimensions Environmental Operating Temperature Storage Temperature Relative Humidity Bandwidth, -3dB Response Time, 90% Span Output Range Output Protection DATAQ Instruments, Inc. • 241 Springside Drive • Akron, Ohio 44333 • Tel: 330-668-1444 • Email: support@dataq.com • www.dataq.com DI-8B47 Linearized Thermocouple Input Module Block Diagram Ordering Information Model Number TC Type Input Range DI-8B47J-01 J 0°C to +760°C (+32°F to +1400°F) DI-8B47J-02 J -100°C to +300°C (-148°F to +572°F) DI-8B47J-03 J 0°C to +500°C (+32°F to +932°F) DI-8B47J-12 J -100°C to +760°C (-148°F to +1400°F) DI-8B47K-04 K 0°C to +1000°C (+32°F to +1832°F) DI-8B47K-05 K 0°C to +500°C (+32°F to +932°F) DI-8B47K-13 K -100°C to +1350°C (-148°F to +2462°F) DI-8B47K-14 K 0°C to +1200°C (+32°F to +2192°F) T -100°C to +400°C (+32°F to +392°F) DI-8B47T-06 T 0°C to +200°C (+32°F to +392°F) DI-8B47T-07 * Includes conformity, hysteresis, and repeatability. Does not include CJC Accuracy. Accuracy* ±0.24% ±1.82°C ±0.24% ±0.96°C ±0.21% ±1.05°C ±0.24% ±2.10°C ±0.24% ±2.40°C ±0.24% ±1.05°C ±0.24% ±3.60°C ±0.24% ±2.88°C ±0.48% ±2.40°C ±0.39% ±0.75°C DATAQ INSTRUMENTS R 241 Springside Drive Akron, Ohio 44333 330-668-1444 Data Acquisition Product Links (click on text to jump to page) Data Acquisition | Data Logger | Chart Recorder | Thermocouple | Oscilloscope The information on this data sheet is subject to change without notice. DATAQ and the DATAQ logo are registered trademarks of DATAQ Instruments, Inc. All rights reserved. Copyright © 2005 DATAQ Instruments, Inc.