NI 9221 Measurement System

The NI 9221 Measurement System measures 8 voltage channels at 800 kS/s with 12-bit resolution, sending data to a host PC over USB, Ethernet or 802.11 Wi-Fi.

Measurement Bundle Overview
The hardware for an NI CompactDAQ single measurement bundle consists of a USB, Ethernet, or 802.11 Wi-Fi chassis and one of the over 50 NI C Series measurement-specific modules. These small rugged bundles are ideal for portable or distributed measurements.

Chassis
The chassis controls the timing for the module and handles communication with the PC over the USB, Ethernet, or 802.11 Wi-Fi bus. Additionally, all NI CompactDAQ chassis include four counter/timers that you can access through a digital I/O module like the NI 9401.

Module
The NI 9221 is a C Series module for high-speed measurements with a range of ±60 V. This wider voltage range makes this module well-suited for industrial-level, automotive, or even smaller-cell battery measurements.

As with the majority of C Series modules, the NI 9221 is protected from harmful voltage spikes of up to 2,300 Vrms. This means that no harmful voltage within the isolation rating can harm other modules in the system, the chassis, or any connected computer equipment. In addition to the absolute protection from the isolation, the module offers up to 100 V of overvoltage protection for errant signal connection or unexpected outputs to the channels.

You can choose from two connector options for the NI 9221: a 10-position screw terminal connector for direct connectivity and a 25-position D-SUB connector. The industry-standard 25-position D-SUB connector provides for low-cost cabling to a wide variety of accessories from NI or other vendors. Some vendors also offer custom D-SUB cable fabrication services and provide cables with a pinout that matches your exact application needs.

NI recommends the NI 9932 strain relief connector accessory for the NI cRIO-9221 analog input module. The NI 9934 (or other 25-pin D-SUB connector) is required to use the NI 9221 with a D-SUB module. The NI 9934 includes a screw terminal connector with strain relief as well as a D-SUB solder cup backshell for creating custom cable assemblies.

For a 24-bit, ±60 V C Series module with channel-to-channel isolation, consider the NI 9229.

Specifications Documents

• Specifications  (3)

Specifications Summary

Additional Product Information

• Manuals  (15)
• Dimensional Drawings  (4)
• Product Certifications  (5)

Related Information

• Videos: Learn How to Take Your First Measurement With NI CompactDAQ Out of the Box