The National Instruments PCI-6624 is a versatile Counter/Timer Device designed to meet a range of industrial needs. Featuring eight independent counters, each equipped with three isolated inputs and a single isolated output, this device supports various functionalities such as event counting, frequency measurement, and pulse train generation. Typical applications include the generation of retriggerable pulses, dual-signal edge division measurement, continuous buffered event counting, and ongoing buffered pulse train measurements. The PCI-6624 is engineered for robustness, making it suitable for sectors such as automotive/aviation, motion control, and manufacturing testing.

This device includes 34 programmable function interface (PFI) lines, offering eight outputs and 26 inputs that can be configured as either inputs or outputs but not both simultaneously. The inputs can be referenced to the ground or supply of connected external devices, featuring current-limiting protection to safeguard the optical isolator. Signals are transmitted through the TIO, with reverse polarity protection provided by an integrated diode.

Performance limits for the TIO depend on bus bandwidth, processor speed, operating system, and associated application software. To optimize bus performance, a reduction in the number of devices generating bus cycles is recommended. Direct Memory Access (DMA) is employed by the NI-DAQmx driver by default for faster data acquisition relative to interrupt-driven transfers. Additionally, the PCI-6624 is equipped with an oven-controlled crystal oscillator (OCXO) providing a highly stable 10 MHz clock, which can serve as a gate or source for the counters.

With physical dimensions of 6.9 x 4.2 inches, the PCI-6624 operates effectively within a temperature range of 0 °C to 55 °C and can be stored at temperatures ranging from -20 °C to 70 °C. Programming options include compatibility with software environments such as LabVIEW and LabWindows/CVI, and the device is supported by NI-DAQmx version 7.1 or higher. The PCI-6624 is backed by a three-year warranty, and comprehensive user and maintenance manuals are available for download. For pricing information, please consult a National Instruments sales representative.