Description
1. Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | PXI-6602 |
| Manufacturer | National Instruments (NI) |
| Product Category | 8-Channel Timing and Synchronization Module |
| Counter/Timers | 8 independent 24-bit counter/timers, 80 MHz maximum clock frequency |
| Clock Sources | Internal 10 MHz reference clock; external clock input (1 Hz to 10 MHz); PXI 10 MHz backplane clock |
| Trigger Inputs | 8 PFI (Programmable Function Interface) lines for digital triggers |
| Trigger Outputs | 2 dedicated trigger outputs; support for PXI trigger lines (8 lines) and star trigger |
| Timebase Stability | ±50 ppm (internal 10 MHz clock) |
| DMA Channels | 2 DMA channels for high-speed data transfer |
| FIFO Buffer Size | 4 kS (per counter) |
| Connector Type | 68-pin VHDCI (Very High-Density Cable Interconnect) |
| Physical Dimensions | 6.3 x 3.9 in |
| Weight | 7.8 oz |
| Operating Temperature Range | 0 to 55 °C |
| Storage Temperature Range | -20 to 70 °C |
| Humidity Range | 5 to 95% non-condensing |
| Calibration Interval | 1 year |
| Software Compatibility | LabVIEW, LabWindows/CVI, Measurement Studio, Visual Studio (C/C++, C#) |
NI PXI-6602
2. Product Introduction
The NI PXI-6602 is a high-performance timing and synchronization module designed for the PXI platform, specializing in precise timing control, event counting, and synchronization across multiple devices in a test or measurement system. As a key component of NI’s timing solutions, it addresses the critical need for accurate timing in complex data acquisition and control setups.
Featuring 8 independent 24-bit counter/timers with a maximum clock frequency of 80 MHz, the PXI-6602 offers exceptional flexibility for a wide range of timing tasks. These counters can be configured to perform functions such as frequency measurement, event counting, pulse generation, and time-interval measurement. For example, in a manufacturing line, the module can count the number of products passing a sensor (event counting) while generating precise pulses to trigger a labeling machine (pulse generation), ensuring seamless coordination between processes.
The module’s support for multiple clock sources—including an internal 10 MHz reference, external clocks, and the PXI backplane 10 MHz clock—enables synchronization with external devices or other PXI modules. This makes the PXI-6602 indispensable in systems where multiple instruments (such as DAQ modules, oscilloscopes, or signal generators) must operate in perfect harmony, such as in aerospace testing or high-speed communication systems.
3. Core Advantages and Technical Highlights
High-Precision Timing Control
With 80 MHz counter/timers, the PXI-6602 delivers nanosecond-level timing resolution, critical for applications requiring precise measurement of short intervals. For instance, in telecommunications testing, it can measure the time delay between transmitted and received signals with accuracy down to 12.5 ns, ensuring compliance with strict industry standards for signal latency.
Versatile Synchronization Capabilities
The module’s ability to synchronize with internal, external, and PXI backplane clocks makes it a hub for system-wide timing. By locking to the PXI 10 MHz backplane clock, the PXI-6602 can synchronize multiple PXI modules (such as the PXI-6115 DAQ module) to within a few nanoseconds, eliminating timing errors that could compromise data integrity in multi-channel acquisition systems. External clock support also allows integration with external instruments, such as signal generators or atomic clocks, for ultra-precise timing in research settings.
Flexible Triggering Options
Equipped with 8 PFI lines and support for PXI trigger lines, the PXI-6602 offers robust triggering capabilities. It can respond to external digital triggers (e.g., a pulse from a motion sensor) or generate triggers to control other devices. In automotive testing, for example, it can trigger a DAQ module to start acquiring data when a vehicle’s speed exceeds a threshold, ensuring that critical events are captured without delay.
Multi-Functional Counter Modes
Each counter on the PXI-6602 can be configured in 11 different modes, including frequency measurement, period measurement, pulse-width measurement, and pulse generation. This versatility allows the module to adapt to diverse applications: in a power grid monitoring system, it can measure the frequency of AC power signals; in a robotics lab, it can generate variable-width pulses to control motor speed; and in a physics experiment, it can measure the time between laser pulses.
4. Typical Application Scenarios
Aerospace and Defense Systems
In aerospace testing, the PXI-6602 synchronizes data acquisition from multiple sensors during flight simulations. For example, it can trigger simultaneous data capture from accelerometers, gyroscopes, and pressure sensors mounted on an aircraft wing, ensuring that all measurements are time-aligned. This synchronization is vital for analyzing how different components respond to aerodynamic forces at the same instant, enabling engineers to validate structural integrity.
High-Speed Manufacturing
In semiconductor manufacturing, the PXI-6602 coordinates precision equipment such as wafer handlers and inspection cameras. It counts the number of wafers processed (event counting) and generates timing pulses to trigger camera inspections at specific intervals, ensuring that each wafer is inspected at the correct stage of production. The module’s high precision prevents misalignment between processing and inspection, reducing defects and improving yield.
Telecommunications Testing
Telecom labs use the PXI-6602 to test the timing accuracy of network equipment, such as routers and switches. It measures the jitter (variation in signal timing) of data packets and generates synchronized clock signals to simulate real-world network conditions. This ensures that equipment meets strict timing standards, preventing data loss or corruption in high-speed communication networks.
Scientific Research
In physics and engineering research, the PXI-6602 is used to timestamp events with high precision. For example, in particle physics experiments, it can record the arrival time of particles at multiple detectors, allowing researchers to reconstruct particle trajectories. Its ability to synchronize with external lasers or accelerators ensures that all measurements are referenced to a common time base, enhancing data accuracy.
NI PXI-6602
5. Related Model Recommendations
PXI Chassis
The PXI-6602 requires a PXI chassis for operation, such as the NI PXI-1082 (a 18-slot chassis with advanced cooling) or PXI-1062Q (a compact 6-slot chassis with integrated controller). These chassis provide the 10 MHz backplane clock needed for synchronization with other PXI modules, making them ideal for building scalable timing systems.
DAQ Modules
Pair the PXI-6602 with DAQ modules like the PXI-6115 for synchronized data acquisition. The PXI-6602 can trigger the PXI-6115 to start sampling at precise intervals, ensuring that analog signals are captured at the exact moment events occur—critical in applications like vibration analysis or transient signal measurement.
Signal Generators
For systems requiring both timing control and signal generation, combine the PXI-6602 with a PXI-5412 arbitrary waveform generator. The PXI-6602 can synchronize the generator’s output with external events, such as triggering a waveform when a sensor detects a specific condition, useful in radar or sonar testing.
Cables and Accessories
The PXI-6602 uses a 68-pin VHDCI connector, requiring cables like the NI SHC68-68-EPM (shielded cable for noise-sensitive environments) or 192675-01 (high-flex cable for dynamic applications). These cables ensure reliable transmission of triggers and clock signals between the module and external devices.
6. Installation, Commissioning and Maintenance Instructions
Installation Preparation
Before installing the PXI-6602, power off the PXI chassis and ensure the workspace is clean and static-free. Use an anti-static wristband to prevent ESD damage to internal components. Identify an available slot in the chassis (preferably near other modules requiring synchronization) and align the module with the guide rails. Gently insert the module until it seats firmly, then secure it with front panel screws. Prepare connections using shielded cables to minimize noise in trigger and clock signals, and verify that external clock sources match the module’s input specifications (1 Hz to 10 MHz).
Commissioning Steps
Power on the chassis and launch NI MAX to detect the PXI-6602. Configure clock sources (internal, external, or backplane) and counter modes via software. Calibrate the module using NI’s calibration utility to ensure timing accuracy—verify the internal 10 MHz clock against a traceable frequency standard. Test counter functionality by generating a known frequency signal (e.g., from a function generator) and using the module to measure it, confirming that results match the expected value within tolerance.
Maintenance Suggestions
Regularly inspect the PXI-6602 for loose connectors or dust buildup; clean vents and connectors monthly with compressed air. Check clock synchronization annually using a precision frequency counter to ensure stability within the ±50 ppm specification. If trigger signals are unreliable, inspect cable shielding and grounding—ensure the module shares a common ground with connected devices. For persistent issues, refer to the user manual or contact NI technical support for troubleshooting.
7. Service and Guarantee Commitment
NI provides a 3-year standard warranty for the PXI-6602, covering defects in materials and workmanship. During the warranty period, NI offers free repairs or replacements for qualifying issues. Technical support is available via online resources (knowledgebase, user forums), email, and phone, with experts assisting in setup, synchronization configuration, and software integration. For out-of-warranty modules, NI offers calibration services and repairs to extend operational life. With a focus on reliability, NI ensures the PXI-6602 delivers consistent timing performance in critical applications, backed by a global network of service partners.
