Description
The NI-9235 is a model within the C Series Analog Input category, bearing the part number 785995-01. This model is designed as an 8 Channel Quarter-Bridge Input, capable of handling inputs specifically from 120 Ω Quarter-Bridge Strain Gage. It offers a sample rate of 10 kS/s/channel, ensuring rapid data acquisition for all eight channels simultaneously.
The input range of the NI-9235 is ±29.4 mV/V, providing ample headroom for various signal strengths. When it comes to safety and durability, this model features overvoltage protection of ±30 V between any two terminals and offers isolation up to 60 VDC continuous, with 1,000 Vrms transient, safeguarding the device and the user from potential electrical hazards.
One of the key features of the NI-9235 is its built-in excitation, which supplies the required output current to all eight channels at minimum resistance. This is particularly beneficial for simplifying the setup and ensuring consistent performance across all channels. Each channel is equipped with an independent, 24-bit ADC (Analog-to-Digital Converter), allowing for high-resolution data acquisition.
Moreover, the NI-9235 operates with ground isolation, meaning it functions independently from earth ground, which is crucial for reducing noise and preventing ground loops in measurement systems. However, it is important to note that there is no isolation between channels; all excitation (EXC) terminals are connected to a common excitation supply. Lastly, the device includes a software-enabled switch and precision resistor per channel for shunt calibration, facilitating accurate measurements and ensuring the reliability of data.
| Specification | Details |
|---|---|
| Part Number | 785995-01 |
| Category | C Series Analog Input |
| Model | NI-9235 |
| Description | 8 Channel Quarter-Bridge Input |
| Channels | 8 |
| Input Type | 120 Ω Quarter-Bridge Strain Gage |
| Sample Rate | 10 kS/s/channel |
| Input Range | ±29.4 mV/V |
| Isolation | Up to 60 VDC continuous, 1,000 Vrms transient |
| Overvoltage Protection | ±30 V between any two terminals |
| Excitation | Built-in, supplies required output current to all eight channels at minimum resistance |
| ADC | Independent, 24-bit per channel |
| Ground Isolation | Operates in isolation from earth ground |
| Channel Isolation | No isolation between channels; all EXC terminals connect to a common excitation supply |
| Shunt Calibration | Software-enabled switch and precision resistor per channel |
