The National Instruments PCI-6221 is a robust Multifunction I/O Device from the M Series, designed for diverse applications including laboratory automation, research, and manufacturing. This cost-effective data acquisition solution excels in design verification and manufacturing tests, offering essential capabilities such as 16 single-ended or 8 differential analog input channels with a 16-bit resolution and a maximum data acquisition rate of 250 kS/s. The PCI-6221 features two analog output channels with rates of 833 kS/s for single-channel use and 740 kS/s for dual-channel operation. Designed for ease of use, it is compatible with the NI-DAQ mx driver and the Measurement & Automation Explorer (MAX) tool, allowing simplified configuration and measurement processes. Additionally, this device includes two 32-bit counters/timers, digital triggering, and offers 8 correlated digital I/O channels in the 68-pin version and 2 in the 37-pin version, supporting data rates up to 1 MHz. With a weight of 3.2 oz and dimensions of 4.2 x 6.1 inches, the PCI-6221 operates in a bus-powered environment, accepting 3.3 V or 5 V signals and providing an analog input absolute accuracy of 3100 μV. Although the PCI-6221 has reached a mature status, National Instruments continues to support its availability for purchase and repairs by Apex Waves. Comprehensive user and maintenance manuals can be downloaded for additional support. For pricing inquiries, please contact a sales representative.