NI PXI-6608 | PXI Digital I/O and Counter Module

Description

PXI-6608: Product OverviewThe National Instruments PXI-6608 is a high-performance counter/timer module designed specifically for PXI systems, providing advanced timing, counting, and digital I/O capabilities for industrial automation, test, and measurement applications. This module features eight independent 32-bit counters/timers and 32 lines of TTL/CMOS-compatible digital I/O, making it a versatile solution for a wide range of precision timing and control tasks

.The PXI-6608 is an enhanced version of the PXI-6602, featuring a high-stability constant temperature crystal oscillator (OCXO) that provides exceptional timing accuracy. This module supports maximum source frequencies up to 80MHz and includes advanced features such as digital jitter removal filters and duplicate counting prevention, ensuring accurate measurements even in challenging industrial environments

NI PXI-6608

.PXI-6608: Technical Specifications

• Model Number:​ PXI-6608
• Manufacturer:​ National Instruments
• Product Type:​ Counter/Timer Module
• Compatible System:​ PXI Platform
• Counters/Timers:​ 8 independent 32-bit counters
• Digital I/O:​ 32 lines (8 dedicated, 24 shared with counters)
• Maximum Source Frequency:​ 80MHz (up to 125MHz with prescaler)
• Oscillator:​ 10MHz constant temperature crystal oscillator (OCXO)
• Resolution:​ 32-bit
• DMA Capability:​ 3 simultaneous high-speed DMA transfers
• Input Impedance:​ 25kΩ to 500kΩ
• Output Impedance:​ 75Ω
• Power Supply:​ 1A to 2.5A
• Operating Temperature:​ 0°C to 55°C
• Storage Temperature:​ -20°C to 70°C
• Dimensions:​ 16.0 x 10.0 cm
• Software Support:​ NIDAQmx driver, compatible with LabVIEW, LabWindows/CVI, Measurement Studio

Core Features & Customer ValueThe PXI-6608 delivers significant value through its high-precision timing capabilities​ and versatile counter/timer functionality. The module’s 8 independent 32-bit counters​ enable parallel execution of multiple timing and counting tasks, eliminating the need for multiple single-function modules. Each counter can be configured in different modes, allowing simultaneous frequency measurement, pulse generation, and event counting

.The 10MHz OCXO oscillator​ provides exceptional timing stability, ensuring accurate time measurement and pulse generation for critical applications. The module’s digital jitter removal filters​ help reduce signal noise and improve measurement accuracy, while the duplicate counting prevention feature​ ensures accurate counting even with non-periodic external sources

.For system integrators, the PXI-6608 offers seamless integration​ with other PXI modules through PXI trigger lines and the PXI Star trigger system, enabling precise multi-module synchronization in complex test and control systems

NI PXI-6608

.Typical Applications

• Industrial Automation:​ Encoder position measurement, event counting, production line monitoring
• Test and Measurement:​ Frequency measurement, period measurement, pulse width analysis
• Research Experiments:​ High-speed event counting, precise timing in physics and chemistry experiments
• Manufacturing Testing:​ Production line test stations, quality control systems
• Motion Control:​ Robotics, CNC machines, motor control systems