Product Introduction
Земля NI PXIe-2525 is a PXI Express multiplexer switch module designed for automated test, signal routing, data acquisition, electronic validation, and production test applications.
The module provides two independent 8×1 multiplexer banks, allowing multiple signals from a device under test, sensor system, or electronic assembly to be routed to shared measurement instruments under software control.
With its modular PXI Express architecture, the PXIe-2525 can be integrated with digital multimeters, data acquisition devices, digitizers, source measurement units, and other PXI instrumentation to build compact and scalable automated measurement systems.
Product Overview
Земля National Instruments PXIe-2525 is designed for applications requiring reliable programmable signal switching within a PXI Express test platform.
Its dual-bank multiplexer architecture allows two groups of signals to be independently routed, making the module useful for multi-channel measurements and automated test sequences.
Типичные применения включают:
- Automated signal routing
- Digital multimeter measurements
- Data acquisition systems
- Electronic device validation
- Production test
- Functional test systems
- Sensor measurements
- PCB testing
- Автоматизированное испытательное оборудование
Key Features
Two Independent 8×1 Multiplexer Banks
The PXIe-2525 provides two independent 8×1 multiplexer banks.
Each bank can select one of multiple input channels and connect the selected signal to a common measurement path.
The dual-bank architecture provides additional flexibility for applications requiring two independently controlled signal groups.
PXI Express Switching Platform
The PXIe-2525 is designed for the PXI Express platform, allowing programmable signal switching to be integrated directly into a modular automated test system.
The module can operate alongside other PXI and PXI Express instruments in a compatible chassis, allowing switching, measurement, generation, and control functions to be combined within one test platform.
Multiplexer Signal Routing
A multiplexer allows multiple DUT signals to share a smaller number of measurement instruments.
A typical PXIe-2525 measurement architecture can be represented as:
DUT Signals → PXIe-2525 → DMM / DAQ / Measurement Instrument → Test Software
The test software selects the required signal path, performs the measurement, and then switches to the next channel automatically.
150 V CAT I Signal Capability
The PXIe-2525 is designed for signal-switching applications with ratings appropriate for CAT I measurement environments.
This makes the module suitable for routing compatible electronic signals in automated test and measurement systems.
Users should always verify the exact voltage, current, power, and category limits for the selected topology and terminal configuration before connecting a DUT.
Electromechanical Relay Switching
The PXIe-2525 uses electromechanical relay switching, making it suitable for applications where signal integrity, low leakage, and flexible measurement routing are important.
Compared with semiconductor switching technologies, electromechanical relays can provide advantages for applications requiring:
- Low leakage
- High isolation
- Low contact resistance
- DC and low-frequency signal routing
- Precision measurements
Software-Controlled Signal Routing
The PXIe-2525 can be controlled programmatically as part of an automated test sequence.
Software can automatically:
- Open and close switch routes
- Select measurement channels
- Change DUT connections
- Coordinate switching with measurements
- Execute repetitive test sequences
- Automate multi-channel measurements
High-Channel-Count Measurement Expansion
Multiplexer switching allows a limited number of precision instruments to measure a larger number of DUT signals.
Instead of dedicating a measurement instrument to every signal, the PXIe-2525 can sequentially route multiple signals to a shared instrument.
This can reduce:
- Instrument count
- System cost
- Rack space
- System complexity
- Calibration requirements
Technical Specifications
| Параметр | Описание |
|---|---|
| Product Type | PXI Express Multiplexer Switch Module |
| Модель | NI PXIe-2525 |
| Platform | PXI Express |
| Switch Type | Multiplexer |
| Primary Topology | Two Independent 8×1 Multiplexer Banks |
| Смена технологий | Electromechanical Relay |
| Measurement Category | CAT I |
| Maximum Voltage Class | Up to 150 V |
| Software-Controlled Switching | Supported |
| Driver | NI-SWITCH |
| Primary Applications | Automated Test, Signal Routing, DAQ, Electronic Validation and Production Test |
What Is a PXI Multiplexer?
A PXI multiplexer is a programmable switching instrument used to connect multiple input signals to one or more common measurement paths.
For example, an electronic assembly may contain multiple voltage measurement points but the automated test system may contain only one precision digital multimeter.
The multiplexer allows the DMM to measure these signals sequentially:
Channel 1 → PXIe-2525 → DMM → Measurement
Channel 2 → PXIe-2525 → DMM → Measurement
Channel 3 → PXIe-2525 → DMM → Measurement
… → Continue Automated Test Sequence
This architecture is widely used in automated test systems because it allows precision measurement instruments to be shared across multiple DUT channels.
Dual-Bank Multiplexer Architecture
A key characteristic of the PXIe-2525 is its two-bank switching architecture.
Instead of providing only one multiplexer group, the module provides two independently controlled 8×1 banks.
This architecture can be useful when a test system needs to independently route two groups of signals.
Например:
Signal Group A → Bank 1 → Measurement Path A
Signal Group B → Bank 2 → Measurement Path B
The exact wiring architecture should be configured according to the application’s signal and measurement requirements.
PXIe-2525 with a Digital Multimeter
One of the most common applications for the PXIe-2525 is signal routing to a digital multimeter.
A PXI DMM can provide precision measurement capability while the PXIe-2525 determines which DUT signal is connected to the instrument.
A typical architecture is:
Multiple DUT Test Points → PXIe-2525 → PXI DMM → Test Software
Depending on the DMM and system wiring, this architecture can support automated measurements such as:
- DC voltage
- AC voltage
- Resistance
- Continuity
- Other compatible electrical measurements
PXIe-2525 with Data Acquisition Systems
The PXIe-2525 can also be used as a signal-routing layer for compatible data acquisition systems.
A switching module can increase the number of signals accessible to a limited number of DAQ measurement channels.
Например:
Sensors / DUT Signals → PXIe-2525 → DAQ Module → PXI Controller
The system sequentially selects the required signal and performs the measurement according to the programmed test sequence.
Automated Functional Testing
Functional test systems frequently require different DUT signals to be connected to measurement equipment at different stages of a test.
The PXIe-2525 can automate this routing process.
- Select the required DUT channel.
- Close the appropriate PXIe-2525 route.
- Perform the measurement.
- Open the route.
- Select the next channel.
- Repeat the measurement sequence.
- Store and evaluate the test results.
Automated switching reduces manual cable changes and improves measurement repeatability.
Electronic Device Validation
During design verification and validation, engineers often need to measure multiple signals across a circuit board or electronic subsystem.
The PXIe-2525 can dynamically route these test points to compatible measurement instruments.
Типичные применения включают:
- PCB validation
- Prototype testing
- Electronic subsystem validation
- Voltage measurements
- Resistance measurements
- Continuity testing
- Automated regression testing
Production Test Applications
The PXIe-2525 can be integrated into automated production test stations requiring repeatable signal routing.
Типичные применения включают:
- PCB functional testing
- Electronic assembly testing
- End-of-line testing
- Manufacturing validation
- Automated continuity testing
- Multi-channel measurements
- Automated pass/fail testing
Electromechanical Relay vs FET Switching
| Функция | Electromechanical Relay | FET Switch |
|---|---|---|
| Смена технологий | Mechanical Contacts | Полупроводник |
| Leakage | Typically Very Low | Typically Higher |
| Изоляция | Typically High | Device Dependent |
| Скорость переключения | Moderate | Быстро |
| Mechanical Wear | Да | No |
| Relay Life | Finite | No Mechanical Relay Life |
| Precision DC Routing | Often Well Suited | Application Dependent |
The appropriate switching technology depends on voltage, current, bandwidth, leakage, isolation, switching speed, relay lifetime, and measurement accuracy requirements.
Understanding CAT I
CAT I equipment is intended for measurements on circuits that are not directly connected to the building’s mains distribution system.
The PXIe-2525 should therefore be used only within its specified measurement category and electrical limits.
Users should not assume that a 150 V CAT I rating means the module can safely switch any 150 V source regardless of its origin or transient environment.
PXIe-2525 in a Complete PXI System
The PXIe-2525 can function as the signal-routing component of a complete PXI automated test system.
A typical system may include:
- PXI Шасси
- PXI Контроллер
- PXIe-2525 multiplexer switch
- PXI digital multimeter
- Модули PXI
- PXI data acquisition module
- PXI source measurement unit
- PXI programmable power supply
- PXI digital I/O
- Additional PXI switching modules
This modular architecture allows measurement, signal generation, switching, communication, and control functions to be combined within one automated test platform.
Typical Measurement Workflow
A typical automated test sequence using the PXIe-2525 may operate as follows:
- The PXI controller starts the automated test sequence.
- The PXIe-2525 selects the required DUT channel.
- The switch establishes the required signal path.
- The measurement instrument acquires the signal.
- The software records the measurement result.
- The switch disconnects the current channel.
- The next channel is selected.
- The process continues until all required measurements are completed.
Software and Driver Support
The PXIe-2525 is designed for integration with NI’s automated switching software environment.
Typical software can include:
- NI-SWITCH
- ЛабВью
- LabWindows/CVI
- Тестовая стойка
- Compatible programming environments
NI-SWITCH provides programmatic control of compatible NI switch modules and allows test applications to configure signal routes automatically.
NI Switch Executive Integration
For larger automated test systems containing multiple switch modules, compatible systems can use NI Switch Executive to simplify route configuration and management.
Logical route definitions can help engineers manage complex signal paths without manually controlling every individual relay in application code.
Important Selection Parameters
Before selecting a PXIe-2525 for a test system, engineers should evaluate both topology and electrical requirements.
- Required multiplexer topology
- Number of signal channels
- Maximum signal voltage
- Maximum switching current
- Maximum switching power
- Measurement category
- Contact resistance
- Пропускная способность
- Relay operating time
- Expected relay switching cycles
- Signal leakage requirements
- Isolation requirements
- Terminal block or connectivity requirements
When Should You Choose the PXIe-2525?
The PXIe-2525 is a suitable choice when an automated test application requires:
- PXI Express switching
- Two independent multiplexer banks
- 8×1 signal routing
- Electromechanical relay switching
- Precision signal routing
- Automated DMM measurements
- DAQ channel expansion
- Software-controlled test sequences
If the application instead prioritizes extremely high channel density or very high switching speed, a FET-based switching module may be more appropriate.
Industries
- Automated Test Equipment
- Electronic Manufacturing
- Аэрокосмическая и оборонная промышленность
- Automotive Electronics
- Тестирование полупроводников
- Industrial Electronics
- Research and Development
- Laboratory Measurement
- Electronic Validation
Applications
Digital Multimeter Signal Routing
The PXIe-2525 can route multiple compatible DUT signals to a shared DMM for automated sequential measurements.
Data Acquisition Channel Expansion
Multiplexer switching allows multiple signals to share compatible DAQ measurement channels, increasing the number of test points accessible to the measurement system.
Automated Production Testing
Software-controlled switching can automate repetitive measurements in manufacturing and end-of-line test systems.
Electronic Validation
Engineers can automatically route different PCB and subsystem test points to measurement instruments during design verification.
Functional Testing
The dual-bank multiplexer architecture can support automated functional tests requiring different signal paths throughout a test sequence.
Sensor Measurement Systems
Compatible sensor signals can be sequentially routed to measurement instruments in multi-channel monitoring and data acquisition systems.
Comparison with Similar PXI Switch Modules
The PXIe-2525 is particularly suitable when the application requires a compact dual-bank 8×1 electromechanical multiplexer. Other PXI switch modules may be more appropriate when substantially higher channel density, different topologies, higher switching speed, or different electrical characteristics are required.
| Selection Requirement | PXIe-2525 |
|---|---|
| PXI Express Platform | Да |
| Multiplexer Switching | Да |
| Independent Banks | 2 |
| Primary Topology | 2-Bank 8×1 |
| Switch Technology | Electromechanical Relay |
| Precision Signal Routing | Suitable |
| DMM Multiplexing | Suitable |
| DAQ Signal Routing | Suitable |
| Automated Production Test | Suitable |
Recommended Related Products
| NI PXIe-2525 | Dual-bank 8×1 PXI Express multiplexer for programmable signal routing and automated measurements. |
| NI PXI-2533 | High-density FET-based PXI multiplexer and matrix switch for applications requiring substantially greater channel density and fast repetitive switching. |
| NI PXI Modules | PXI and PXI Express measurement, switching, data acquisition, communication, and automated test modules. |
Why Choose NI PXIe-2525?
- PXI Express multiplexer switch module
- Two independent 8×1 multiplexer banks
- Electromechanical relay switching
- 150 V CAT I signal class
- Software-controlled signal routing
- Suitable for precision measurement switching
- Suitable for DMM signal routing
- Suitable for DAQ channel expansion
- Supports automated measurement sequences
- Suitable for production test systems
- Suitable for electronic validation
- Modular PXI Express architecture
Frequently Asked Questions
What is the NI PXIe-2525?
The NI PXIe-2525 is a PXI Express multiplexer switch module designed for software-controlled signal routing in automated test and measurement systems.
What topology does the PXIe-2525 provide?
The PXIe-2525 provides two independent 8×1 multiplexer banks, allowing two groups of signals to be independently routed to common measurement paths.
What type of switching technology does the PXIe-2525 use?
The PXIe-2525 uses electromechanical relay switching.
What does 8×1 multiplexer mean?
An 8×1 multiplexer allows one of eight signal channels to be selected and connected to a common signal path. The PXIe-2525 provides two independently controlled 8×1 banks.
Is the PXIe-2525 a PXI or PXI Express module?
The PXIe-2525 is a PXI Express switch module designed for installation in a compatible PXI Express chassis.
Can the PXIe-2525 be used with a digital multimeter?
Yes. One of its primary applications is routing multiple compatible DUT signals to a shared digital multimeter for automated sequential measurements.
Can the PXIe-2525 be used with a DAQ system?
Yes. It can be used to route multiple compatible signals to data acquisition hardware, allowing measurement channels to be shared across multiple test points.
Can the PXIe-2525 be used for resistance measurements?
The module can be used as part of compatible resistance measurement systems when connected to an appropriate DMM or measurement instrument. Wiring configuration, contact resistance, lead resistance, and the required measurement accuracy should be considered.
What is the advantage of the two-bank architecture?
The two independent banks allow two groups of signals to be routed separately, providing greater flexibility than a single 8×1 multiplexer.
Does the PXIe-2525 use FET switches?
No. The PXIe-2525 uses electromechanical relays. If an application requires very fast repetitive switching and extremely high switching-cycle capability, a FET-based switch such as the PXI-2533 may be more appropriate.
What does 150 V CAT I mean?
CAT I refers to measurements on circuits that are not directly connected to the building mains distribution system. The actual signal voltage, current, switching power, and measurement-category limits specified for the PXIe-2525 must always be observed.
What software is used with the PXIe-2525?
The PXIe-2525 can be controlled using NI-SWITCH and integrated into automated test applications developed with LabVIEW, TestStand, LabWindows/CVI, and other compatible software environments.
Can the PXIe-2525 be used for automated production testing?
Yes. Programmable signal routing makes the PXIe-2525 suitable for automated functional test, PCB testing, electronic assembly validation, and production test systems.
What is the difference between PXIe-2525 and PXI-2533?
The PXIe-2525 is an electromechanical relay multiplexer with two independent 8×1 banks, while the PXI-2533 is a much higher-density FET-based switching module. The PXIe-2525 is better suited to applications where relay-based signal characteristics are important, while the PXI-2533 is advantageous for high-density and frequent high-speed switching.
What applications are suitable for the PXIe-2525?
Typical applications include DMM signal routing, DAQ channel expansion, automated functional testing, PCB validation, electronic device testing, sensor measurements, production test, and laboratory automation.
What should I check before purchasing a PXIe-2525?
Before purchasing a PXIe-2525, verify the required multiplexer topology, channel count, signal voltage, switching current, switching power, measurement category, contact resistance, bandwidth, relay lifetime, required terminal block or cable, PXI Express chassis compatibility, and NI-SWITCH software compatibility.
Заключение
Земля NI PXIe-2525 PXI Express Multiplexer Switch Module provides two independent 8×1 multiplexer banks for software-controlled signal routing in automated test systems. Its electromechanical relay architecture, PXI Express integration, and flexible dual-bank configuration make it suitable for digital multimeter multiplexing, DAQ channel expansion, electronic validation, functional testing, sensor measurements, and automated production test applications.
