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330-668-1444Model DI-8B42-01
Isolated 4-20mA 8B-style Amplifier
- +12VDC Loop Supply
- Provides Isolation for Non-Isolated 2-Wire Transmitters
- High Level Voltage Outputs
- 1500Vrms Transformer Isolation
- ANSI/IEEE C37.90.1 Transient Protection
- Input Protected to 40VAC Continuous
- 100dB CMR
- 100Hz Bandwidth
- ±0.05% Accuracy
- ±0.02% Linearity
- Low Drift with Ambient Temperature
- UL, CSA, FM and CE Certifications Pending
- Mix and Match Module Types
- 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-8B42 module provides power to a current transmitter, then isolates, filters and amplifies the resulting process current input signal and provides an analog voltage output.
Current to voltage conversion is accomplished internal to the module to ensure high accuracy.
Signal filtering is accomplished with a three-pole filter optimized for time and frequency response which provides 60dB per decade of normal-mode rejection above 100Hz. 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-8B42 module provides protection against accidental connection of power-line voltages up to 40VAC. Clamp circuits on the I/O and power terminals protect against harmful transients.
Isolation is provided by optical coupling to suppress transmission of common mode spikes or surges. The module is powered from +5VDC, ±5%.
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: | 4-20mA |
| Input Resistance: | Normal: 35Ω Power Off: 35Ω |
| Input Protection: | Continuous: 40VAC Transient: ANSI/IEEE C37.90.1 |
| Loop Supply Voltage: | 12VDC |
| Loop Supply Protection: | 40VAC |
| CMV, Input to Output: | 1500Vrms max |
| Transient, Input to Output: | ANSI/IEEE C37.90.1 |
| CMR (50Hz or 60Hz): | 100dB |
| NMR: | 60dB per decade above 100Hz |
| Accuracy: | ±0.05% Span (Includes nonlinearity, hysteresis and repeatability) |
| Nonlinearity: | ±0.02% Span |
| Stability: | Offset: ±25ppm/ºC Gain: ±75ppm/ºC |
| Noise: | Output, 100kHz: 500µVrms |
| Bandwidth, -3dB: | 100Hz |
| Response Time, 90% Span: | 5ms |
| Output Range: | 0 to +5V |
| Output Protection: | Transient: Continuous Short to Ground ANSI/IEEE C37.90.1 |
| Power Supply Voltage: | +5VDC ±5% |
| Power Supply Current: | 140mA |
| Power Supply Sensitivity: | ±50ppm/% |
| 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
How To Determine Loop Load in Process Current Measurements
Learn the Importance of Isolation In Four Easy Lessons
Bandwidth and DI-8B/DI-5B Series Signal Conditioning Modules
