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| 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 -40C to +85C * CSA, FM, and CE Certifications Pending * Mix and Match Module Types SPECIFICATIONS Input Range Input Bias Current Input Resistance Typical at TA = +25C and +5V Power DI-8B47 -0.1V to +0.5V -25nA Normal Power Off Overload Continuous Transient 50M 450k 450k 240VAC ANSI/IEEE C37.90.1 0.25mA 0.02C/ 1500Vrms max ANSI/IEEE C37.90.1 120dB 70dB at 60Hz See Ordering Information on Page 2 20ppm/C 75ppm/C 250Vrms 3Hz 150ms 0 to +5V Continuous Short to Ground ANSI/IEEE C37.90.1 0.5C 1.5C +5VDC 5% 30mA 25ppm/% 1.11" x 1.65" x 0.40" (28.1mm x 41.9mm x 10.2mm) -40C to +85C -40C to +85C 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 DESCRIPTION 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 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. Offset Gain Output, 100kHz Transient Cold Junction Compensation Accuracy, 25C Accuracy, -40C to +85C 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 0C to +760C (+32F to +1400F) DI-8B47J-02 J -100C to +300C (-148F to +572F) DI-8B47J-03 J 0C to +500C (+32F to +932F) DI-8B47J-12 J -100C to +760C (-148F to +1400F) DI-8B47K-04 K 0C to +1000C (+32F to +1832F) DI-8B47K-05 K 0C to +500C (+32F to +932F) DI-8B47K-13 K -100C to +1350C (-148F to +2462F) DI-8B47K-14 K 0C to +1200C (+32F to +2192F) T -100C to +400C (+32F to +392F) DI-8B47T-06 T 0C to +200C (+32F to +392F) DI-8B47T-07 * Includes conformity, hysteresis, and repeatability. Does not include CJC Accuracy. Accuracy* 0.24% 1.82C 0.24% 0.96C 0.21% 1.05C 0.24% 2.10C 0.24% 2.40C 0.24% 1.05C 0.24% 3.60C 0.24% 2.88C 0.48% 2.40C 0.39% 0.75C 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 (c) 2005 DATAQ Instruments, Inc. |
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