PXIe-4339 Universal Bridge Input Module
Земля PXIe-4339 is an 8-channel, 24-bit PXI Express universal bridge input module designed for strain, force, load, pressure, torque and direct voltage measurements. Each channel provides simultaneous sampling at rates up to 25.6 kS/s.
With software-configurable bridge completion, programmable excitation, remote sensing, shunt calibration and TEDS support, the PXIe-4339 provides a flexible measurement platform for test cells, structural testing and automated sensor acquisition systems.
Key Features of the PXIe-4339
- Eight simultaneously sampled analog input channels
- 24-bit Delta-Sigma analog-to-digital converters
- Maximum sample rate of 25.6 kS/s per channel
- Quarter-bridge, half-bridge and full-bridge measurements
- Direct differential voltage measurement support
- Software-selectable excitation for each channel
- Excitation settings from 0.625 V to 10 V
- Maximum excitation current of 30 mA per channel
- Remote excitation sensing
- Per-channel shunt calibration
- TEDS smart sensor support
- Per-channel wide-bandwidth analog outputs
- Programmable digital filtering
- PXI triggering and synchronization support
PXIe-4339 Technical Specifications
| Product Model | PXIe-4339 |
|---|---|
| Part Number | 783531-01 |
| Product Type | Universal Strain/Bridge Input Module |
| Bus Type | PXI Express |
| Analog Input Channels | 8 differential channels |
| ADC Resolution | 24 bits |
| ADC Type | Delta-Sigma |
| Sampling Mode | Синхронный |
| Sample Rate Range | 1 S/s to 25.6 kS/s per channel |
| Bridge Configurations | Quarter bridge, half bridge and full bridge |
| Supported Bridge Resistance | 120 Ω, 350 Ω and 1 kΩ with the appropriate terminal block |
| Voltage Input Ranges | ±100 mV, ±200 mV, ±500 mV and ±10 V |
| Ratiometric Input Ranges | ±10 mV/V to ±4 V/V, depending on excitation setting |
| Excitation Type | Balanced constant differential voltage |
| Excitation Settings | 0.625 V, 1 V, 1.5 V, 2 V, 2.5 V, 2.75 V, 3.3 V, 5 V, 7.5 V and 10 V |
| Maximum Excitation Current | 30 mA per channel |
| Common-Mode Rejection Ratio | 72 dB from DC to 60 Hz |
| Data Transfer | DMA or programmed I/O |
| Front Connector | 96-pin male DIN |
| Form Factor | Standard 3U PXI Express |
PXIe-4339 Part Numbers and Accessories
| Модель | Part Number | Описание |
|---|---|---|
| PXIe-4339 | 783531-01 | 8-channel universal bridge and voltage input module |
| TB-4339 | 783532-01 | 120 Ω quarter-bridge completion and 50 kΩ shunt calibration |
| TB-4339B | 783533-01 | 350 Ω quarter-bridge completion and 100 kΩ shunt calibration |
| TB-4339C | 783534-01 | 1 kΩ quarter-bridge completion and 100 kΩ shunt calibration |
| RM-4339 | 783535-01 | Rack-mount terminal block with in-situ calibration support |
Universal Bridge Sensor Measurements
The PXIe-4339 supports quarter-bridge, half-bridge and full-bridge sensor configurations. This allows one module to acquire signals from strain gauges, load cells, pressure sensors, torque transducers and other Wheatstone bridge-based sensors.
Bridge configuration, input range, excitation voltage and filtering can be selected independently for each channel. This per-channel flexibility is useful in test systems that combine different sensor types and measurement ranges.
Quarter-, Half- and Full-Bridge Configurations
- Quarter bridge: Commonly used with a single active strain gauge and requires the appropriate bridge-completion terminal block.
- Half bridge: Supports two active or one active and one completion element, depending on the measurement configuration.
- Full bridge: Uses four active bridge elements and generally provides higher sensitivity and improved temperature compensation.
The selected terminal block must match the resistance of the quarter-bridge sensor. NI provides separate front-mount terminal blocks for 120 Ω, 350 Ω and 1 kΩ bridge completion.
Simultaneous 25.6 kS/s Acquisition
Each of the eight channels uses a dedicated 24-bit Delta-Sigma ADC. All channels are sampled simultaneously at rates up to 25.6 kS/s, preserving timing relationships between multiple force, strain, pressure or torque signals.
Simultaneous sampling is especially important for dynamic structural measurements, mechanical event analysis and applications that require phase comparisons between sensors.
Programmable Bridge Excitation
The PXIe-4339 provides balanced constant-voltage excitation that can be programmed independently for each channel. Available settings range from 0.625 V to 10 V, with up to 30 mA of excitation current per channel.
Lower excitation voltages can help reduce strain-gauge self-heating, while higher excitation can improve output sensitivity when supported by the connected bridge. The maximum permitted excitation depends on the sensor resistance and bridge configuration.
Remote Sensing and Shunt Calibration
Remote-sense connections allow the PXIe-4339 to measure the excitation voltage at the bridge instead of only at the module. This helps compensate for voltage drops caused by long cables and conductor resistance.
Each channel also supports shunt calibration through the compatible terminal block. Shunt calibration introduces a known resistance change that can be used to verify the measurement channel, sensor wiring and scaling.
Direct Voltage Measurements
In addition to bridge measurements, the PXIe-4339 supports direct differential voltage input ranges of ±100 mV, ±200 mV, ±500 mV and ±10 V. This makes the module suitable for conditioned sensors and other voltage-output devices.
The voltage and bridge measurement modes are configured through software, allowing the same module to accommodate several sensor interface requirements.
Wide-Bandwidth Analog Outputs
Each channel includes a wide-bandwidth analog output derived from the first stage of the input signal chain. These outputs can be connected to external oscilloscopes, control systems or protection equipment when access to a conditioned analog representation of the sensor signal is required.
The wide-bandwidth outputs operate independently of the digitized data path and are current-limited for protection.
TEDS Smart Sensor Support
The PXIe-4339 supports Transducer Electronic Data Sheet technology. Compatible TEDS sensors can store identification, calibration and scaling information that NI-DAQmx can use during channel configuration.
TEDS support reduces manual data entry, helps prevent scaling errors and simplifies the replacement of sensors in production and test-cell installations.
Typical PXIe-4339 Applications
- Strain-gauge measurements
- Load-cell and force measurements
- Pressure transducer acquisition
- Torque sensor measurements
- Structural and fatigue testing
- Automotive test cells
- Aerospace structural validation
- Material and component testing
- Industrial machinery monitoring
- Multichannel synchronized sensor acquisition
NI-DAQmx Software Support
The PXIe-4339 is supported by the NI-DAQmx driver. Engineers can configure bridge type, gauge resistance, gauge factor, excitation, input range, shunt calibration, filtering, sampling and triggering through NI Measurement & Automation Explorer or an application program.
Compatible development environments include LabVIEW, LabWindows/CVI, C and C#. NI FlexLogger can also be used to configure and record strain, force, pressure and voltage measurements without creating a complete custom program.
Terminal Block Selection
Select the terminal block according to the resistance of the quarter-bridge sensor:
- TB-4339: Designed for 120 Ω quarter-bridge sensors.
- TB-4339B: Designed for 350 Ω quarter-bridge sensors.
- TB-4339C: Designed for 1 kΩ quarter-bridge sensors.
- RM-4339: Provides a rack-mount connection option for larger test-cell installations.
For half-bridge, full-bridge or direct voltage measurements, confirm the required wiring, shunt resistor and connectivity before selecting the terminal block.
PXI Express System Integration
The PXIe-4339 installs in a compatible PXI Express chassis and supports PXI timing and triggering resources. Multiple modules can be synchronized with other PXI instruments for combined strain, force, vibration, temperature and voltage measurements.
Maintain the airflow specified for the chassis and install filler panels in unused slots. Sensor cables should be shielded and routed away from motors, switching power supplies and high-current wiring.
PXIe-4339 Troubleshooting
The module is not detected in NI MAX
Confirm that the PXIe-4339 is properly installed in a compatible PXI Express slot. Verify the chassis and controller connection, install a supported NI-DAQmx version and refresh the hardware list in NI Measurement & Automation Explorer.
The strain reading has a large offset
Check the bridge wiring, completion resistance, excitation voltage and remote-sense connections. Perform an offset-null operation after the sensor has been installed and unloaded.
The measured value changes when the cable moves
Inspect the sensor cable and terminal connections for loose conductors or inadequate shielding. Use remote sensing for long cables and secure the wiring to prevent mechanical strain from affecting the connection.
The sensor output is noisy
Reduce the measurement bandwidth with digital filtering, use shielded twisted-pair wiring and separate sensor cables from noise sources. Confirm that the chassis and sensor shield are grounded correctly.
Excitation voltage is lower than configured
Verify that the sensor resistance does not require more than the available 30 mA per-channel excitation current. Check the excitation conductors and use remote sensing to account for cable voltage drop.
A quarter-bridge channel does not measure correctly
Confirm that the terminal block matches the sensor resistance. Use the TB-4339 for 120 Ω, TB-4339B for 350 Ω or TB-4339C for 1 kΩ quarter-bridge sensors.
PXIe-4339 Compared with Related Bridge Modules
| Модель | Каналы | Разрешение | Maximum Sample Rate | Best Suited For |
|---|---|---|---|---|
| PXIe-4339 | 8 | 24-бит | 25.6 kS/s | Flexible bridge and direct voltage measurements |
| PXIe-4330 | 8 | 24-бит | 25 kS/s class | Simultaneous strain and bridge measurements |
| PXIe-4331 | 8 | 24-бит | 102.4 kS/s | Higher-speed dynamic strain measurements |
| PXIe-4340 | 4 | 24-бит | 25.6 kS/s | LVDT and RVDT sensor measurements |
| NI-9237 | 4 | 24-бит | 50 kS/s | CompactDAQ and CompactRIO bridge measurements |
Recommended Related Products
- PXIe-4330 Strain/Bridge Input Module – An 8-channel module for simultaneous bridge-based measurements.
- PXIe-4331 Strain/Bridge Input Module – A higher-speed option for dynamic strain and structural testing.
- PXIe-4340 LVDT/RVDT Input Module – A four-channel module for displacement and position sensors.
- NI-9237 Bridge Input Module – A four-channel C Series alternative for CompactDAQ and CompactRIO systems.
- PXIe-1092 PXI Express Chassis – A chassis for synchronized modular measurement systems.
Additional strain, bridge and sensor measurement products are available in the NI PXI Modules category.
Selecting the PXIe-4339
Choose the PXIe-4339 when a test system requires multiple bridge configurations, programmable excitation, direct voltage measurement and simultaneous acquisition in one module. It is especially suitable for test cells containing several different bridge-based transducers.
If higher dynamic sample rates are required, consider the PXIe-4331. For CompactDAQ or CompactRIO installations, the NI-9237 provides a lower-channel-count C Series alternative.
Why Choose the PXIe-4339?
- Supports multiple bridge and voltage sensor types
- Samples all eight channels simultaneously
- Provides independently programmable channel settings
- Includes bridge excitation and remote sensing
- Supports offset nulling and shunt calibration
- Provides TEDS sensor identification and scaling
- Integrates with synchronized PXI test systems
Frequently Asked Questions
What is the PXIe-4339 used for?
The PXIe-4339 acquires signals from strain gauges, load cells, pressure transducers, torque sensors and other Wheatstone bridge devices. It can also measure differential voltage signals.
How many input channels does the PXIe-4339 provide?
The module provides eight simultaneously sampled differential analog input channels.
What is the maximum sample rate?
The PXIe-4339 supports sample rates from 1 S/s to 25.6 kS/s per channel.
Which bridge configurations are supported?
The module supports quarter-bridge, half-bridge and full-bridge measurements, as well as direct differential voltage measurements.
Does the PXIe-4339 provide sensor excitation?
Yes. It provides software-selectable balanced excitation from 0.625 V to 10 V, with a maximum current of 30 mA per channel.
Does the module support TEDS sensors?
Yes. Each channel provides a TEDS interface for compatible smart sensors containing identification and scaling information.
Which terminal block should I use?
Use the TB-4339 for 120 Ω, TB-4339B for 350 Ω or TB-4339C for 1 kΩ quarter-bridge completion. The RM-4339 is available for rack-mounted installations.
What is the part number for the PXIe-4339?
The standard NI part number for the PXIe-4339 is 783531-01.
Request a Quote for the PXIe-4339
Contact us for current availability, lead time and project pricing for the PXIe-4339 Universal Bridge Input Module. We can also help identify compatible terminal blocks, shielded cables, PXI Express chassis and related strain measurement modules for your system.
