PXIe-4304 32-Channel 24-Bit Analog Input Module
The PXIe-4304 is a 32-channel, 24-bit PXI Express analog input module designed for simultaneous acquisition of higher-voltage signals. It provides a ±42 V input range, dedicated ADCs and selectable digital filtering for every channel.
All 32 differential input channels can acquire signals simultaneously at rates up to 5 kS/s per channel. The module is suitable for industrial voltage monitoring, battery testing, power system measurements and automated validation applications.
Key Features of the PXIe-4304
- 32 differential analog input channels
- 24-bit analog input resolution
- ±42 V input range
- Simultaneous sampling on every channel
- 5 kS/s maximum sampling rate per channel
- Dedicated delta-sigma ADC for each channel
- Selectable digital filter for individual channels
- 2 Hz, 20 Hz, 200 Hz, 1 kHz and 2 kHz filter settings
- Integrated anti-alias filtering
- Up to four concurrent sample-rate and trigger configurations
- DMA and programmed I/O data transfers
- NI-DAQmx software support
PXIe-4304 Technical Specifications
| Product Model | PXIe-4304 |
|---|---|
| Part Number | 783867-01 |
| Product Type | PXI Express Simultaneous Filtered Analog Input Module |
| Analog Input Channels | 32 differential |
| ADC Resolution | 24 bit |
| ADC Type | Delta-sigma |
| Sampling Mode | Simultaneous |
| Sample-Rate Range | 1 S/s to 5 kS/s per channel |
| Input Range | ±42 V |
| Maximum Working Voltage | ±42 V, signal plus common mode |
| Input Coupling | DC |
| Input Impedance | 1.15 MΩ differential |
| Common-Mode Rejection Ratio | 80 dB, DC to 60 Hz |
| Digital Filter Settings | 2 Hz, 20 Hz, 200 Hz, 1 kHz and 2 kHz |
| Concurrent Timing Engines | Up to 4 |
| Fault Protection | 42 V between analog input terminals |
| FIFO Buffer | 1,023 samples |
| Data Transfers | DMA and programmed I/O |
| Front Connection | 96-pin DIN |
| Bus Type | PXI Express |
| Operating Temperature | 0°C to 55°C |
PXIe-4304 Part Number and Accessories
| Item | Part Number | Description |
|---|---|---|
| PXIe-4304 | 783867-01 | 32-channel, 24-bit, 5 kS/s, ±42 V analog input module |
| TB-4304 | 783870-01 | Front-mount terminal block for PXIe-4304 and PXIe-4305 |
| RM-4304 | 783873-01 | Rack-mount terminal block with in-situ calibration support |
| SH96F-96M-42V | 158228-01 | 1 m shielded cable for rack-mount terminal block connections |
| SH96F-96M-42V | 158228-03 | 3 m shielded cable for rack-mount terminal block connections |
| SH96F-96M-42V | 158228-05 | 5 m shielded cable for rack-mount terminal block connections |
The TB-4304 mounts directly on the front of the PXI module. The RM-4304 requires a compatible SH96F-96M-42V cable and provides accessible rack-mounted signal connections.
32-Channel Simultaneous Acquisition
The PXIe-4304 includes one dedicated ADC for each of its 32 differential analog input channels. All channels can therefore acquire signals at the same instant at rates up to 5 kS/s per channel.
Simultaneous sampling preserves phase and timing relationships across the measurement system, making the module suitable for synchronized voltage measurements and multichannel transient monitoring.
24-Bit Measurement Resolution
The module uses 24-bit delta-sigma ADCs to provide high-resolution measurements across its ±42 V input range. This architecture supports precise acquisition of slowly changing and low-frequency voltage signals.
The combination of differential inputs, anti-alias filtering and high-resolution conversion helps reduce measurement noise in industrial and laboratory environments.
±42 V Input Range
The PXIe-4304 measures differential voltage signals over a fixed ±42 V range. This higher range allows it to connect directly to signals that exceed the ±10 V capability of many conventional data acquisition modules.
The maximum working voltage, including the signal and common-mode voltage, must remain within ±42 V. The module should not be used for measurements requiring hazardous-voltage isolation.
Per-Channel Digital Filtering
A digital low-pass filter can be selected independently for each channel. Available cutoff frequencies include 2 Hz, 20 Hz, 200 Hz, 1 kHz and 2 kHz.
Channels monitoring slowly changing signals can use stronger filtering, while channels measuring faster signal changes can use a higher cutoff frequency.
Integrated Anti-Alias Filtering
The PXIe-4304 includes anti-alias filtering to reduce high-frequency components that could appear incorrectly in sampled data. The filter configuration should be selected according to the signal bandwidth and chosen sampling rate.
This filtering makes the module suitable for precision monitoring applications where noise rejection is more important than very high acquisition speed.
Four Concurrent Timing Configurations
The PXIe-4304 supports up to four different sample-rate and triggering configurations at the same time. Channels can be divided into groups according to their measurement bandwidth and timing requirements.
This helps reduce unnecessary data while allowing faster-changing and slower-changing voltage signals to be monitored by the same module.
Differential Voltage Measurements
All 32 channels use differential connections. Each signal is measured between an AI+ and AI− terminal, helping reject common-mode interference and reduce errors caused by ground-potential differences.
Floating sources can be connected using the internal input resistance as a ground reference. Additional balanced bias resistors may improve noise immunity but can introduce loading errors.
Typical Applications
- Industrial voltage monitoring
- Battery pack testing
- Energy-storage system validation
- Power supply testing
- Automotive electrical system measurements
- Aerospace electrical validation
- Process monitoring
- Multichannel DC voltage logging
- Electronic component testing
- Automated production testing
NI-DAQmx Software Support
The PXIe-4304 is supported by the NI-DAQmx driver, which provides configuration, triggering, timing, scaling and data-transfer functions. Applications can be developed using LabVIEW, Python, C, C# and other supported programming environments.
NI-DAQmx also includes example programs and diagnostic utilities to simplify installation, configuration and troubleshooting.
FlexLogger Integration
FlexLogger can configure and record PXIe-4304 measurements without requiring a complete custom application. Users can define channel names, sample rates, scaling, alarms and logging conditions through an interactive interface.
This software is useful for validation systems, long-duration voltage logging and automated environmental testing.
Terminal Block Selection
Choose the TB-4304 for a compact front-mounted screw-terminal connection. It attaches directly to the PXIe-4304 and does not require an external cable.
Choose the RM-4304 for rack-mounted systems requiring front-panel signal access and in-situ calibration. The RM-4304 connects to the module through an SH96F-96M-42V shielded cable.
PXI Express System Integration
The PXIe-4304 requires a compatible PXI Express chassis and controller. System design should consider slot compatibility, cooling, synchronization, channel count and overall data throughput.
Visit the NI PXI Modules category to explore related measurement hardware for a complete PXI system.
Troubleshooting the PXIe-4304
The module is not detected
Confirm that the PXIe-4304 is installed in a compatible PXI Express slot. Check the chassis controller, PXI Platform Services and NI-DAQmx installation.
The measured voltage is incorrect
Check the terminal assignments, signal polarity, differential wiring and engineering-unit scaling. Confirm that both the signal and common-mode voltage remain within the supported range.
Measurements contain excessive noise
Verify shielding, grounding and cable routing. Select a suitable digital filter and keep measurement cables separated from switching power supplies, motors and high-speed digital signals.
A floating signal source produces unstable readings
Confirm that the source has an appropriate reference path. Balanced external bias resistors may improve noise immunity, but their resistance must be selected to avoid excessive source loading.
The acquired waveform appears distorted
Check the selected filter cutoff and sampling rate. A filter with a low cutoff frequency can attenuate or reshape faster signal components.
Some channels use an unexpected sample rate
Review channel grouping and timing configuration. The module supports up to four simultaneous sample-rate and trigger configurations.
PXIe-4304 Comparison
| Model | Channels | Resolution | Maximum Rate | Input Range |
|---|---|---|---|---|
| PXIe-4304 | 32 | 24 bit | 5 kS/s per channel | ±42 V |
| PXIe-4305 | 32 | 24 bit | 51.2 kS/s per channel | ±42 V |
| PXIe-4302 | 32 | 24 bit | 5 kS/s per channel | ±100 mV and ±10 V |
| PXIe-4300 | 8 | 16 bit | 250 kS/s per channel | Up to 300 V with isolation |
Recommended Related Products
- PXIe-4305 – 32-channel, ±42 V module with a higher 51.2 kS/s sampling rate
- PXIe-4302 – 32-channel module with ±100 mV and ±10 V ranges for lower-voltage signals
- PXIe-4300 – 8-channel isolated module for measurements up to 300 V
- PXIe-4303 – high-speed 32-channel module for ±10 V and low-level measurements
- PXIe-1092 – PXI Express chassis for modular measurement systems
Selecting the PXIe-4304
Choose the PXIe-4304 when an application requires 32 simultaneous, high-resolution differential voltage measurements over a ±42 V range and a maximum rate of 5 kS/s per channel.
If faster sampling is required, consider the PXIe-4305. For lower-level signals and thermocouple measurements, the PXIe-4302 may be more suitable. For isolated high-voltage measurements, consider the PXIe-4300.
PXIe-4304 vs PXIe-4305
The PXIe-4304 and PXIe-4305 both provide 32 differential analog inputs, 24-bit resolution, simultaneous sampling, a ±42 V range and selectable digital filters.
The primary difference is sampling speed. The PXIe-4304 supports up to 5 kS/s per channel, while the PXIe-4305 supports up to 51.2 kS/s per channel. The PXIe-4304 is suitable for lower-bandwidth voltage monitoring, while the PXIe-4305 is intended for faster signals.
Why Choose the PXIe-4304?
- 32 differential voltage input channels
- 24-bit resolution for precision measurements
- Simultaneous sampling across all channels
- Direct measurement of signals up to ±42 V
- Independent digital filtering for each channel
- Up to four concurrent timing configurations
- Front-mount and rack-mount terminal options
Frequently Asked Questions
What is the PXIe-4304 used for?
The PXIe-4304 is used for high-density acquisition of voltage signals up to ±42 V in industrial monitoring, battery testing, power system validation and automated test applications.
How many analog input channels does it provide?
The module provides 32 differential analog input channels.
Does the PXIe-4304 sample all channels simultaneously?
Yes. Every channel has a dedicated ADC, allowing all 32 channels to acquire signals simultaneously.
What is the maximum sampling rate?
The PXIe-4304 supports sampling rates up to 5 kS/s per channel.
What is the analog input range?
The module provides a fixed ±42 V differential input range.
Is the PXIe-4304 channel-to-channel isolated?
No. The module does not provide channel-to-channel isolation. Use an isolated measurement module when signals have hazardous voltages or large common-mode differences.
Which terminal block is compatible with the PXIe-4304?
The TB-4304 front-mount terminal block and RM-4304 rack-mount terminal block are designed for the PXIe-4304 and PXIe-4305.
What is the difference between the PXIe-4304 and PXIe-4305?
Both models provide 32 channels, 24-bit resolution and a ±42 V range. The PXIe-4304 operates at up to 5 kS/s per channel, while the PXIe-4305 operates at up to 51.2 kS/s per channel.
What is the PXIe-4304 part number?
The standard NI part number for the PXIe-4304 is 783867-01.
Request a Quote for the PXIe-4304
Contact us for current availability, lead time and project pricing for the PXIe-4304 Analog Input Module. We can also help confirm compatible terminal blocks, cables, PXI chassis and related measurement modules for your application.
