Description
The part number for this product is 199940A-03L, with an alternative part number being 785995-01. It falls under the category of C Series Analog Input, specifically the NI-9235 model. This model is a Strain/Bridge Input Module designed for precise measurements. It features an 8-Channel configuration, allowing multiple measurements to be taken simultaneously. Each channel supports a sample rate of 10 kS/s/channel, ensuring high-speed data acquisition.
The input range of this module is ±29.4 mV/V, which suits a wide array of strain and bridge measurement applications. It is capable of handling measurements up to 120 Ω, providing flexibility for various sensor types. For safety and reliability, this module offers 60 VDC continuous and 1,000 Vrms transient isolation, along with ±30 V overvoltage protection between any two terminals.
An important feature of the NI-9235 is its built-in excitation, which supplies output current to all eight channels at minimum resistance, ensuring consistent performance across all channels. Each channel is equipped with an independent, 24-bit Analog-to-Digital Converter (ADC) and an independent input amplifier, enhancing the accuracy and reliability of measurements.
The module’s design provides ground isolation, operating independently from earth ground to prevent noise and interference from affecting measurement accuracy. However, it is important to note that the EXC terminals connect to a common excitation supply, meaning there is no isolation between channels. Lastly, shunt calibration can be enabled through software, with a precision resistor per channel, facilitating easy and accurate calibration.
| Specification | Details |
|---|---|
| Part Number | 199940A-03L (alternative: 785995-01) |
| Category | C Series Analog Input |
| Model | NI-9235 |
| Type | Strain/Bridge Input Module |
| Channels | 8-Channel |
| Sample Rate | 10 kS/s/channel |
| Input Range | ±29.4 mV/V |
| Measurement Capability | Up to 120 Ω measurements |
| Isolation | 60 VDC continuous, 1,000 Vrms transient |
| Overvoltage Protection | ±30 V between any two terminals |
| Excitation | Built-in, supplies output current to all eight channels at minimum resistance |
| Analog-to-Digital Converter (ADC) | Independent, 24-bit per channel |
| Input Amplifier | Independent per channel |
| Ground Isolation | Operates in isolation from earth ground |
| Channel Isolation | EXC terminals connect to a common excitation supply (no isolation between channels) |
| Shunt Calibration | Software-enabled switch and precision resistor per channel |
Question 1: What is the part number for the NI-9235?
Answer 1: 199940A-03L or 785995-01
Question 2: How many channels does the NI-9235 have?
Answer 2: 8 channels
Question 3: What is the sample rate of the NI-9235 per channel?
Answer 3: 10 kS/s/channel
Question 4: What is the input range of the NI-9235?
Answer 4: ±29.4 mV/V
Question 5: Does the NI-9235 offer isolation between channels?
Answer 5: No, channels are not isolated
