PXIe-4357 RTD Temperature Input Module
The PXIe-4357 is a 20-channel, 24-bit PXI Express temperature input module designed for accurate resistance temperature detector measurements. It provides integrated signal conditioning and excitation for Pt100 sensors using 2-wire, 3-wire or 4-wire connections.
With a temperature measurement range of -200°C to 850°C, software-selectable timing modes and automatic conversion into engineering units, the PXIe-4357 is suitable for thermal validation, environmental monitoring and high-channel-count temperature acquisition systems.
Key Features of the PXIe-4357
- 20 dedicated RTD input channels
- 24-bit Delta-Sigma analog-to-digital converter
- Supports 2-wire, 3-wire and 4-wire RTD connections
- Optimized for Pt100 resistance temperature detectors
- Temperature measurement range from -200°C to 850°C
- Resistance measurement range from 0 Ω to 400 Ω
- 0.9 mA excitation current per channel
- Maximum aggregate sample rate up to 100 S/s
- High-resolution and high-speed timing modes
- 60 V channel-to-earth-ground common-mode range
- Digital triggering and PXI synchronization support
- Compatible with NI-DAQmx software
PXIe-4357 Technical Specifications
| Product Model | PXIe-4357 |
|---|---|
| Part Number | 782118-01 |
| Product Type | PXI RTD Temperature Input Module |
| Bus Type | PXI Express |
| Number of Channels | 20 RTD input channels |
| ADC Resolution | 24 bits |
| ADC Type | Delta-Sigma |
| Sampling Mode | Scanned |
| Maximum Sample Rate | 100 S/s aggregate |
| Supported Sensor | Pt100 RTD |
| RTD Wiring Configurations | 2-wire, 3-wire and 4-wire |
| Temperature Range | -200°C to 850°C |
| Resistance Range | 0 Ω to 400 Ω |
| Excitation Current | 0.9 mA per channel |
| DC Linearity | ±15 ppm maximum |
| Common-Mode Voltage | ±60 VDC channel to earth ground |
| I/O Connector | 96-pin male DIN connector |
| Operating Temperature | 0°C to 55°C |
| Recommended Warm-Up Time | 15 minutes |
| Recommended Calibration Interval | 1 year |
| Form Factor | Standard 3U PXI Express |
| Weight | Approximately 145 g |
PXIe-4357 Part Number and Accessories
| Model | Part Number | Description |
|---|---|---|
| PXIe-4357 | 782118-01 | 20-channel, 24-bit Pt100 RTD input module |
| TB-4357 | 782119-01 | 96-pin DIN to 80-position screw-terminal block |
Integrated Pt100 RTD Measurements
The PXIe-4357 combines resistance measurement, sensor excitation and signal conditioning in a single PXI Express module. Each channel supplies a 0.9 mA excitation current, eliminating the need for a separate external excitation source in standard Pt100 measurement systems.
NI-DAQmx can automatically convert the measured resistance into temperature units using the configured RTD characteristics. Channel settings can be programmed individually, which makes it possible to accommodate different wiring configurations within the same test system.
2-Wire, 3-Wire and 4-Wire RTD Connections
- 2-wire connection: Uses the fewest conductors but includes test-lead resistance in the measurement result.
- 3-wire connection: Compensates for lead resistance when the conductor resistances are closely matched.
- 4-wire connection: Provides the highest measurement accuracy by separating excitation and resistance-sensing paths.
A 4-wire connection is recommended for precision measurements and long sensor cables. A 3-wire configuration provides a practical balance between wiring cost and accuracy for many industrial applications.
High-Resolution and High-Speed Modes
The PXIe-4357 provides nine ADC timing modes. High-resolution modes deliver stronger 50 Hz and 60 Hz power-line noise rejection, while faster timing modes increase acquisition speed for applications with more rapidly changing temperatures.
At the highest-speed setting, the module supports an aggregate sample rate of up to 100 S/s with all 20 channels enabled. The appropriate timing mode should be selected according to the required measurement speed, noise rejection and accuracy.
PXI Triggering and Synchronization
The module supports start, reference and pause triggers through PXI trigger lines, PXI_STAR and PXIe differential star trigger resources. It can also synchronize its measurement clock with compatible PXI Express instruments.
These features allow temperature data to be correlated with voltage, current, strain, vibration and other measurements in synchronized validation systems.
Typical PXIe-4357 Applications
- Battery-cell and battery-pack thermal testing
- Automotive component validation
- Environmental chamber monitoring
- Electronic device thermal characterization
- Aerospace system testing
- Industrial process temperature monitoring
- Power electronics testing
- Heating and cooling system validation
- Research and laboratory data acquisition
- High-channel-count Pt100 measurements
NI-DAQmx Software Support
The PXIe-4357 is supported by the NI-DAQmx driver. Engineers can configure physical channels, RTD wiring methods, measurement ranges, acquisition timing and trigger conditions through NI Measurement & Automation Explorer or supported programming environments.
Application development options include LabVIEW, LabWindows/CVI, C, C# and other NI-DAQmx-compatible environments. NI FlexLogger can also be used to configure and log temperature measurements without developing a complete custom application.
TB-4357 Terminal Block
The TB-4357 is the dedicated front-mount terminal block for the PXIe-4357. It connects the module’s 96-pin DIN interface to 80 screw terminals, providing accessible connections for up to 20 RTD sensors.
The terminal block supports a maximum measurement range of 60 V. Shielded cables and compatible accessories should be used to maintain the specified electromagnetic compatibility and measurement performance.
PXI Express Chassis Integration
The PXIe-4357 is a standard 3U PXI Express peripheral module. It can be installed in compatible x1 or x4 PXI Express peripheral slots and PXI Express hybrid slots.
Unused chassis slots should be fitted with filler panels to maintain proper forced-air cooling. Allow the module to warm up for at least 15 minutes before performing measurements that require rated accuracy.
PXIe-4357 Troubleshooting
The module is not detected in NI MAX
Verify that the PXIe-4357 is fully seated in a compatible PXI Express or hybrid slot. Confirm that the chassis, controller and NI-DAQmx driver are operating correctly, then refresh the hardware list in NI Measurement & Automation Explorer.
The measured temperature is incorrect
Check that Pt100 is selected as the sensor type and verify the nominal resistance, temperature coefficient and Callendar-Van Dusen coefficients. The PXIe-4357 is designed for Pt100 sensors within a 0 Ω to 400 Ω resistance range and is not intended for direct Pt1000 measurement.
A 2-wire RTD shows a significant offset
In a 2-wire connection, the resistance of both sensor leads becomes part of the measurement. Use shorter conductors, compensate for the measured lead resistance in software or change to a 3-wire or 4-wire configuration.
A 3-wire RTD measurement is unstable or inaccurate
Confirm that all three conductors have similar resistance and are connected according to the TB-4357 wiring diagram. Unequal lead resistance reduces the effectiveness of 3-wire compensation.
The temperature readings contain excessive noise
Use shielded sensor cables, review grounding and routing, and keep RTD wiring away from motors, switching power supplies and high-current conductors. Select a slower ADC timing mode when stronger 50 Hz or 60 Hz noise rejection is required.
PXIe-4357 Compared with Related Temperature Modules
| Model | Channels | Sensor Type | Best Suited For |
|---|---|---|---|
| PXIe-4357 | 20 | Pt100 RTD | High-density PXI RTD measurements |
| PXIe-4353 | 32 | Thermocouple | High-channel-count thermocouple acquisition |
| NI-9216 | 8 | Pt100 RTD | CompactDAQ and CompactRIO systems |
| NI-9217 | 4 | Pt100 RTD | Lower-channel-count RTD measurements |
| NI-9226 | 8 | Pt1000 RTD | CompactDAQ and CompactRIO Pt1000 measurements |
Recommended Related Products
- PXIe-4353 Thermocouple Input Module – A 32-channel option for high-density thermocouple measurements.
- NI-9216 RTD Input Module – An 8-channel Pt100 RTD module for CompactDAQ and CompactRIO systems.
- NI-9217 RTD Input Module – A 4-channel RTD measurement module for distributed data acquisition.
- NI-9226 RTD Input Module – An 8-channel temperature module designed for Pt1000 sensors.
- PXIe-1092 PXI Express Chassis – A modular chassis for building synchronized PXI measurement systems.
Additional temperature, data acquisition and sensor measurement products are available in the NI PXI Modules category.
Selecting the PXIe-4357
Choose the PXIe-4357 when a PXI Express system requires up to 20 Pt100 sensors, 24-bit resolution and integrated RTD excitation. It is especially suitable when temperature measurements must be synchronized with other PXI instruments.
For thermocouple measurements, consider the PXIe-4353. If Pt1000 sensors are required, select a compatible Pt1000 measurement module such as the NI-9226 instead of using the PXIe-4357 outside its specified resistance range.
Why Choose the PXIe-4357?
- Measures up to 20 Pt100 sensors in one PXI Express slot
- Provides integrated excitation and signal conditioning
- Supports 2-wire, 3-wire and precision 4-wire measurements
- Offers selectable acquisition speed and noise rejection
- Automatically converts resistance readings into temperature
- Supports PXI triggering and synchronized measurements
- Integrates with NI-DAQmx and FlexLogger
Frequently Asked Questions
What is the PXIe-4357 used for?
The PXIe-4357 measures temperature from multiple Pt100 resistance temperature detectors. Typical applications include thermal validation, environmental monitoring, battery testing and industrial temperature acquisition.
How many RTD channels does the PXIe-4357 provide?
The module provides 20 scanned RTD input channels.
Does the PXIe-4357 support 2-wire and 4-wire RTDs?
Yes. Each channel can be configured for a 2-wire, 3-wire or 4-wire RTD connection.
Can the PXIe-4357 measure Pt1000 sensors?
The module is optimized for Pt100 sensors and has a resistance range of 0 Ω to 400 Ω. It is therefore not designed for direct Pt1000 measurements.
What is the maximum sample rate?
The maximum aggregate sample rate is 100 S/s in the highest-speed ADC timing mode. Lower-speed modes provide improved resolution and power-line noise rejection.
Which terminal block is compatible with the PXIe-4357?
The recommended accessory is the TB-4357 front-mount screw-terminal block, part number 782119-01.
What is the part number for the PXIe-4357?
The standard NI part number for the PXIe-4357 is 782118-01.
Request a Quote for the PXIe-4357
Contact us for current availability, lead time and project pricing for the PXIe-4357 RTD Temperature Input Module. We can also help identify compatible TB-4357 terminal blocks, PXI Express chassis and related temperature measurement modules for your system.
