Isolated ±50mV 5B-style Amplifier
- -50mV to +50mV input range
- High Level Voltage Outputs
- 1500Vrms Transformer Isolation
- ANSI/IEEE C37.90.1-1989 Transient Protection
- Input Protected to 240VAC Continuous
- 160dB CMR
- 95dB NMR at 60Hz, 90dB at 50Hz
- ±0.05% Accuracy
- ±0.02% Linearity
- ±1µV/°C Drift
- CSA Certified
- View Dimensions and pinout
Each DI-5B30 and DI-5B31 voltage input module provides a single channel of analog input which is filtered, isolated, amplified, and converted to a high level analog voltage output (see block diagram). This voltage output is logic-switch controlled, allowing these modules to share a common analog bus without the requirement of external multiplexers.
The DI-5B modules are designed with a completely isolated computer side circuit which can be floated to ±50V from Power Common, pin 16. This complete isolation means that no connection is required between I/O Common and Power Common for proper operation of the output switch. If desired, the output switch can be turned on continuously by simply connecting pin 22, the Read-Enable pin to I/O Common, pin 19.
Signal filtering is accomplished with a sixpole filter which provides 95dB of normalmode-rejection at 60Hz and 90dB at 50Hz. Two poles of this filter are on the field side of the isolation barrier, and the other four are on the computer side.
After the initial field-side filtering, the input signal is chopped by a proprietary chopper circuit. Isolation is provided by transformer coupling, again using a proprietary technique to suppress transmission of common mode spikes or surges. The module is powered from +5VDC, ±5%.
A special input circuit on the DI-5B30 and DI-5B31 modules provides protection against accidental connection of power-line voltages up to 240VAC.
16-channel backplane for 5B modules. Each module has its own analog bus. For use with DI-5B Modules.
Dual-channel backplane. For use with DI-5B Modules.
Base element with snap foot required for use with models DI-5B03 and DI-5B04 Backplanes. For use with DI-5B Modules.
5V DC Power Supply for use with both DI-5B and DI-8B Backplanes.
|Input Bias Current:||±0.5nA|
|Input Resistance:||Normal: 50MΩ
Power Off: 40kΩ
|Input Protection:||Continuous: 240Vrms max
Transient: ANSI/IEEE C37.90.1-1989
|CMV, Input to Output:||Continuous: 1500Vrms max
Transient: ANSI/IEEE C37.90.1-1989
|CMR (50Hz or 60Hz):||160dB|
|NMR:||95dB at 60Hz, 90dB at 50Hz|
|Accuracy:||±0.05% Span ±10µV RTI ±0.05% (VZ) (Includes nonlinearity, hysteresis and repeatability; RTI=Referenced to input; VZ is the input voltage that results in 0V output.)|
|Stability:||Input Offset: ±1µV/ºC
Output Offset: ±20µV/ºC
|Noise:||Input, 0.1 to 10Hz: 0.2µVrms
Output, 100kHz: 200µVrms
|Response Time, 90% Span:||0.2s|
|Output Protection:||Continuous Short to Ground|
|Output Selection Time:
(to ±1mV of Vout)
|6µs at Cload = 0 to 2000pF|
|Output Current Limit:||±14mA max|
|Output Enable Control:||Max Logic “0”: +0.8V
Min Logic “1”: +2.4V
Max Logic “1”: +36V
Input Current, “0”, “1”: 0.5µA
|Power Supply Voltage:||+5VDC ±5%|
|Power Supply Current:||30mA|
|Power Supply Sensitivity:||±2µV/%RTI
(RTI=Referenced to input.)
|Mechanical Dimensions:||2.28" × 2.26" × 0.60"
(58mm × 57mm × 15mm)
|Operating Temperature:||-40ºC to +85ºC|
|Storage Temperature:||-40ºC to +85ºC|
|Relative Humidity:||0 to 95% Noncondensing|
|RFI Susceptibility:||±0.5% Span Error at 400MHz, 5W, 3ft|
Other Products in the Series
AC/DC Millivolt (Narrow BW)
- ±10 mV measurement range
- 3 Hz bandwidth (BW)
- Passes DC to near-DC signals
- Isolation supports off-ground measurements