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330-668-1444Model DI-8B45-04
Isolated 0 to 5kHz Frequency 8B-style Amplifier
- Accepts Frequency Input Signals 0 to 5kHz
- TTL or Zero-Crossing Signal Inputs
- High Level Voltage Outputs
- 1500Vrms Transformer Isolation
- ANSI/IEEE C37.90.1 Transient Protection
- Input Protected up to 240VAC Continuous
- 100dB CMR
- 70dB NMR at 60Hz
- ±0.05% Accuracy
- ±0.02% Linearity
- Low Drift with Ambient Temperature
- UL, CSA, FM and CE Certifications Pending
- Mix and Match Module Types on Backpanel
- 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-8B45 module isolates and conditions a frequency input signal and provides an analog voltage output.
The frequency input signal can be either a TTL level or zero crossing with as little as ±100mV amplitude. Input circuitry for each signal type has built-in hysteresis to prevent spurious noise from corrupting the module output. TTL signals are applied to the + and - terminals while zero crossing signals are applied to the +EXC and - terminals. Reference the block diagram. A 5V excitation is available for use with magnetic pick-up or contact closure type sensors. The excitation is available on the - EXC terminal with return on the - terminal.
A special input circuit on the DI-8B45 modules provides protection against accidental connection of power-line voltages up to 240VAC. 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: | 0 to 5 kHz |
| Input Threshold: | Zero Crossing Minimum Input: 100mVp-p Maximum Input: 350Vp-p TTL, 170Vp-p Zero Crossing Minimum Pulse Width: 4µs TTL Input Low: 0.8V max TTL Input High: 2.4V min |
| Input Hysteresis: | Zero Crossing: ±50mV TTL: 1.5V |
| Input Resistance: | Normal: 68kΩ Power Off: 68kΩ Overload: 68kΩ |
| Input Protection: | Continuous: 240VAC (8B30-01: 120VAC) Transient: ANSI/IEEE C37.90.1 |
| Excitation: | +5V at 8mA max |
| CMV, Input to Output: | Continuous: 1500Vrms Transient: ANSI/IEEE C37.90.1 |
| CMR (50Hz or 60Hz): | 100dB |
| Accuracy: | ±0.05% Span (Includes nonlinearity, hysteresis and repeatability) |
| Nonlinearity: | ±0.02% Span |
| Stability: | Offset: ±25ppm/ºC Gain: ±100ppm/ºC |
| Noise: | Output Ripple: <10mVp-p at Input> 2% Span |
| Response Time, 90% Span: | 160ms, 80ms, 35ms, 16ms, 8.5ms, 3.4ms, 1.6ms, 0.8ms |
| 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: | 45mA |
| 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
Low Frequency Measurements Using 8B45 Amplifiers
Learn the Importance of Isolation In Four Easy Lessons
Bandwidth and DI-8B/DI-5B Series Signal Conditioning Modules
