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330-668-1444Model DI-8B47K-05
Isolated K-type Thermocouple 0°C to +500°C (+32°F to +932°F) 8B-style Amplifier
- Measures 0°C to +500°C (+32°F to +932°F)
- Interfaces to Thermocouple Type K
- ±1.05°C Accuracy + CJC error
- 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
- CJC range: -40°C to +85°C
- CSA, FM, and CE Certifications Pending
- Mix and Match Modules
- View Dimensions and pinout
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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.
Accessories
Description
2-position analog I/O backplane, non-multiplexed. For use with DI-8B Modules. View the 8BP02 schematic or the 8BPxx schematic or download the pdf.
Description
4 channel backplane. Each module has its own analog bus. For use with DI-8B Modules. View the 8BP04 schematic or the 8BPxx schematic or download the pdf.
Description
8 channel backplane. Each module has its own analog bus. For use with DI-8B Modules. View the 8BP08 schematic or the 8BPxx schematic or download the pdf.
Description
16 channel backplane. Each module has its own analog bus. For use with DI-8B Modules. View the 8BP16 schematic or the 8BPxx schematic or download the pdf.
Description
5V DC Power Supply for use with both DI-5B and DI-8B Backplanes.
Specifications
| Input Range: | 0°C to +500°C (+32°F to +932°F) |
| Thermocouple Type: | J |
| Accuracy: | ±0.24% ±1.05°C Includes conformity, hysteresis, and repeatability. Does not include CJC Accuracy. |
| Input Bias Current: | -25nA |
| Input Resistance: | Normal: 50MΩ Power Off: 200kΩ Overload: 200kΩ |
| Input Protection: | Continuous: 240VAC (8B30-01: 120VAC) Transient: ANSI/IEEE C37.90.1 |
| CMV, Input to Output: | Continuous: 1500Vrms Transient: ANSI/IEEE C37.90.1 |
| Transient, Input to Output: | ANSI/IEEE C37.90.1 |
| CMR (50Hz or 60Hz): | 120dB |
| Stability: | Offset: ±20ppm/ºC Gain: ±75ppm/ºC |
| Noise: | Output, 100kHz: 250µVrms |
| Bandwidth, -3dB: | 3Hz |
| Response Time, 90% Span: | 150ms |
| Output Range: | 0 to +5V |
| Output Protection: | Transient: Continuous Short to Ground ANSI/IEEE C37.90.1 |
| Cold Junction Compensation: | Accuracy, 25ºC: ±1.25ºC Accuracy, -40ºC to +85ºC: ±8.30ºC |
| Power Supply Voltage: | +5VDC ±5% |
| Power Supply Current: | 30mA |
| Power Supply Sensitivity: | ±100ppm/% |
| Mechanical Dimensions: | 1.11" × 1.65" × 0.40" (28.1mm × 41.9mm × 10.2mm) |
| Operating Temperature: | -40ºC to +85ºC |
| Storage Temperature: | -40ºC to +85ºC |
| Relative Humidity: | 0 to 95% Noncondensing |
Articles
Learn the Importance of Isolation In Four Easy Lessons
Bandwidth and DI-8B/DI-5B Series Signal Conditioning Modules
Sub-zero Thermocouple Measurements
Miniature Thermocouple Assembly Instructions
How To Connect and Calibrate Thermocouples Using DI-8B47 Series Amplifiers
