PXIe-4305 Simultaneous Analog Input Module
The PXIe-4305 is a 32-channel, 24-bit PXI Express analog input module designed for simultaneous higher-voltage measurements. It provides a dedicated Delta-Sigma ADC for every channel, a fixed ±42 V input range and sampling rates up to 51.2 kS/s per channel.
Per-channel digital filtering, four independent timing engines and hardware-timed single-point operation make the PXIe-4305 suitable for power-system monitoring, industrial measurements, electromechanical testing and synchronized data acquisition.
Key Features of the PXIe-4305
- 32 differential analog input channels
- 24-bit Delta-Sigma ADC per channel
- Simultaneous sampling across all channels
- Sample rates from 1 S/s to 51.2 kS/s per channel
- Fixed ±42 V analog input range
- DC-coupled analog inputs
- Selectable digital filtering per channel
- 2 Hz, 20 Hz, 200 Hz, 1 kHz and 2 kHz filter options
- Up to four independent timing and trigger configurations
- Hardware-timed single-point operation
- Analog and digital triggering
- PXI Express synchronization support
- Compatible with NI-DAQmx and FlexLogger
PXIe-4305 Technical Specifications
| Product Model | PXIe-4305 |
|---|---|
| Part Number | 783868-01 |
| Product Type | Simultaneous Filtered Analog Input Module |
| Bus Type | PXI Express |
| Analog Input Channels | 32 differential channels |
| ADC Resolution | 24 bits |
| ADC Type | Delta-Sigma |
| Sampling Mode | Simultaneous |
| Sample Rate Range | 1 S/s to 51.2 kS/s per channel |
| Analog Input Range | ±42 V |
| Maximum Working Voltage | ±42 V, signal plus common mode |
| Input Coupling | DC |
| Differential Input Impedance | 1.15 MΩ |
| Common-Mode Rejection Ratio | 80 dB from DC to 60 Hz |
| Selectable Buffered Filters | 2 Hz, 20 Hz, 200 Hz, 1 kHz and 2 kHz |
| Stopband Attenuation | 120 dB for selectable IIR filters |
| Passband Ripple | 0.2 dB |
| Phase Linearity | ±1° from DC to 23.04 kHz |
| Spurious-Free Dynamic Range | 120 dB at 1 kHz, -60 dBFS |
| Total Harmonic Distortion | -98 dB at 1 kHz, -1 dBFS |
| Timing Engines | 4 |
| DMA Channels | 4 analog input |
| Front Connector | 96-pin male DIN |
| Recommended Warm-Up Time | 15 minutes |
| Calibration Interval | 1 year |
| Operating Temperature | 0°C to 55°C |
| Form Factor | Standard 3U PXI Express |
| Weight | Approximately 156 g |
PXIe-4305 Part Number and Terminal Block
| Model | Part Number | Description |
|---|---|---|
| PXIe-4305 | 783868-01 | 32-channel, 24-bit, ±42 V analog input module |
| TB-4304 | 783870-01 | 96-pin DIN to 82-position screw-terminal block |
32 Simultaneously Sampled Inputs
The PXIe-4305 uses a dedicated 24-bit ADC for each of its 32 differential input channels. All channels can therefore acquire data simultaneously at the maximum sample rate without the timing skew associated with multiplexed analog input systems.
Simultaneous sampling is important when analyzing phase, timing or transient relationships between multiple signals. It is particularly valuable for power, motor, actuator and electromechanical measurements.
±42 V Higher-Voltage Measurements
Each input accepts differential signals within a fixed ±42 V measurement range. This allows the PXIe-4305 to measure higher-voltage sensor and control signals without the external attenuation required by lower-voltage analog input modules.
The maximum working voltage, including the signal and common-mode components, must remain within ±42 V. The PXIe-4305 does not provide channel-to-channel or channel-to-ground isolation.
Per-Channel Digital Filtering
The PXIe-4305 provides optional fourth-order elliptic IIR filters with cutoff frequencies of 2 Hz, 20 Hz, 200 Hz, 1 kHz and 2 kHz. Filter selection can be configured according to the bandwidth and noise requirements of individual channels.
These filters provide 120 dB stopband attenuation and can help reduce broadband noise, power-system interference and unwanted high-frequency components before data is transferred to the host application.
Filter Selection Guide
| Filter Cutoff | Typical Application | Approximate Group Delay at Low Frequency |
|---|---|---|
| 2 Hz | Slow process and steady-state measurements | 113.856 ms |
| 20 Hz | Low-frequency sensor and control measurements | 11.3856 ms |
| 200 Hz | General electromechanical measurements | 1.1385 ms |
| 1 kHz | Faster control and transient signals | 227.4 μs |
| 2 kHz | Higher-bandwidth filtered acquisition | 113.4 μs |
Lower filter cutoff frequencies provide stronger noise reduction but increase signal delay. Filter bandwidth and group delay should both be considered in monitoring and control applications.
Four Independent Timing Engines
The PXIe-4305 can operate as many as four independent timing engines simultaneously. Different channel groups can use separate sample rates and trigger configurations within the same module.
Each buffered or hardware-timed single-point stream supports up to eight channels. This allows faster-changing signals and slower process measurements to be acquired without forcing every channel to use the same timing configuration.
Hardware-Timed Single-Point Operation
Hardware-timed single-point mode is intended for low-latency measurement and control applications. The PXIe-4305 supports single-point acquisition rates from 1 S/s to 51.2 kS/s, depending on system and application performance.
Selectable single-point filters provide cutoff frequencies from 100 Hz to 3 kHz. The hardware-timed single-point ADC group delay is approximately 1.6 μs before the selected digital filter delay is added.
Analog and Digital Triggering
The PXIe-4305 supports analog reference triggers from any of its 32 analog input channels. Available trigger modes include rising edge, falling edge, hysteresis and window-based triggering.
Digital start and reference triggers can be received through PFI0, PXI trigger lines, PXI_STAR and supported PXIe differential star trigger resources. These capabilities simplify synchronization with other PXI instruments.
Typical PXIe-4305 Applications
- Power-system voltage monitoring
- Battery and energy-storage testing
- Automotive electrical system validation
- Industrial process monitoring
- Motor and actuator testing
- Electromechanical system measurements
- Hardware-in-the-loop testing
- Power electronics validation
- Environmental and durability testing
- High-channel-count data acquisition
- Synchronized transient recording
NI-DAQmx and FlexLogger Support
The PXIe-4305 is supported by the NI-DAQmx driver. Engineers can configure voltage channels, sampling, digital filters, timing engines and triggers through NI Measurement & Automation Explorer or a supported programming environment.
Compatible development environments include LabVIEW, LabWindows/CVI, C and C#. NI FlexLogger can also configure, display and record measurements without requiring a complete custom application.
TB-4304 Terminal Block
The TB-4304, part number 783870-01, is the recommended front-mount terminal block for the PXIe-4305. It converts the module’s 96-pin DIN connector into 82 screw terminals for field wiring.
The terminal block is rated for measurements up to 42 V and is also compatible with the PXIe-4304. Verify channel polarity, grounding and strain relief before applying signals.
PXI Express Chassis Integration
The PXIe-4305 is a single-slot x1 PXI Express peripheral module compatible with PXI Express and PXI Express Hybrid slots. It provides four DMA channels for transferring analog data to the host controller.
The module can synchronize to its onboard timebase or the PXIe_CLK100 chassis reference. Multiple modules and other PXI instruments can be coordinated for larger synchronized measurement systems.
PXIe-4305 Troubleshooting
The module is not detected in NI MAX
Confirm that the PXIe-4305 is fully seated in a compatible PXI Express or hybrid slot. Verify the chassis, controller and NI-DAQmx installation, then refresh the hardware list in NI Measurement & Automation Explorer.
The measured voltage is inaccurate
Verify signal polarity, differential wiring and common-mode voltage. Allow the module to warm up for at least 15 minutes and confirm that the signal remains within the fixed ±42 V input range.
The waveform appears delayed
Digital filters introduce frequency-dependent group delay. Review the selected filter cutoff and account for its delay when comparing PXIe-4305 data with measurements from other devices.
High-frequency signal content is missing
Check the selected per-channel filter and sample rate. A low cutoff frequency intentionally removes higher-frequency components and may not be suitable for transient or dynamic measurements.
Different channel groups do not run at the expected rates
Confirm the timing-engine and stream assignments. The module has four timing engines, and each buffered or hardware-timed single-point stream supports a maximum of eight channels.
The readings contain excessive noise
Use shielded twisted-pair wiring, verify differential grounding and route signal cables away from motors, inverters and switching power supplies. Select an appropriate digital filter for the required signal bandwidth.
PXIe-4305 Compared with Related Analog Input Modules
| Model | Channels | Maximum Sample Rate | Input Range or Sensor Type | Best Suited For |
|---|---|---|---|---|
| PXIe-4305 | 32 | 51.2 kS/s/ch | ±42 V | Higher-bandwidth voltage measurements |
| PXIe-4304 | 32 | 5 kS/s/ch | ±42 V | Slower high-channel-count voltage measurements |
| PXIe-4302 | 32 | 5 kS/s/ch class | Filtered voltage input | Precision lower-bandwidth measurements |
| PXIe-4303 | 32 | 51.2 kS/s/ch class | Filtered voltage input | Higher-speed precision voltage acquisition |
| PXIe-4357 | 20 | 100 S/s aggregate | Pt100 RTD | Temperature measurements |
| PXIe-4353 | 32 | Temperature acquisition | Thermocouple | High-density thermocouple measurements |
Recommended Related Products
- PXIe-4304 Analog Input Module – A 32-channel, ±42 V alternative for lower-speed measurements.
- PXIe-4302 Analog Input Module – A filtered simultaneous input module for precision lower-bandwidth acquisition.
- PXIe-4303 Analog Input Module – A higher-speed filtered input option for synchronized voltage measurements.
- PXIe-4357 RTD Input Module – A 20-channel module for Pt100 temperature measurements.
- PXIe-4353 Thermocouple Input Module – A 32-channel module for high-density thermocouple acquisition.
- PXIe-1092 PXI Express Chassis – A chassis for synchronized modular data acquisition systems.
Additional analog input, temperature and sensor measurement products are available in the NI PXI Modules category.
Selecting the PXIe-4305
Choose the PXIe-4305 when an application requires 32 simultaneous differential inputs, a ±42 V range and sample rates up to 51.2 kS/s per channel. It is especially useful when different channel groups require independent rates, triggers or filters.
Select the PXIe-4304 when 5 kS/s per channel is sufficient. For direct temperature measurements, choose a dedicated RTD or thermocouple module rather than the PXIe-4305.
Why Choose the PXIe-4305?
- Measures 32 differential voltage signals simultaneously
- Supports higher-voltage signals within a ±42 V range
- Provides 24-bit resolution on every channel
- Allows per-channel digital filter selection
- Supports four independent timing configurations
- Provides hardware-timed single-point acquisition
- Synchronizes with other PXI Express instruments
Frequently Asked Questions
What is the PXIe-4305 used for?
The PXIe-4305 measures multiple higher-voltage analog signals simultaneously. Common applications include power electronics, battery testing, industrial monitoring and electromechanical validation.
How many analog input channels does it provide?
The module provides 32 differential analog input channels.
What is the maximum sampling rate?
Each channel supports simultaneous sampling at rates up to 51.2 kS/s.
What is the analog input range?
The PXIe-4305 has a fixed differential input range of ±42 V.
Does the PXIe-4305 provide channel isolation?
No. The analog inputs are differential but are not individually isolated. Signal plus common-mode voltage must remain within the module’s ±42 V working limit.
Which digital filters are available?
Buffered acquisition supports selectable 2 Hz, 20 Hz, 200 Hz, 1 kHz and 2 kHz fourth-order elliptic filters.
Which terminal block is compatible with the PXIe-4305?
The recommended accessory is the TB-4304 front-mount screw-terminal block, part number 783870-01.
What is the part number for the PXIe-4305?
The standard NI part number for the PXIe-4305 is 783868-01.
Request a Quote for the PXIe-4305
Contact us for current availability, lead time and project pricing for the PXIe-4305 32-Channel Analog Input Module. We can also help identify compatible TB-4304 terminal blocks, PXI Express chassis and related signal-conditioning modules for your measurement system.
