NI-9222 Getting Started

Connector Types

The NI-9222 has more than one connector type: NI-9222 with screw terminal, NI-9222 with snap in terminal, and NI-9222 with BNC. Unless the connector type is specified, NI-9222 refers to all connector types.

NI-9222 Block Diagram



  • Input signals on each channel are buffered, conditioned, and then sampled by an ADC.
  • Each AI channel provides an independent signal path and ADC, enabling you to sample all channels simultaneously.

NI-9222 Pinout



Table 2. Signal Descriptions
Signal Description
AI+ Positive analog input signal connection
AI- Negative analog input signal connection

Grounded Connections



Make sure the voltage on the AI+ and AI- connections are in the channel-to-earth safety voltage range to ensure proper operation.

Floating Connections



NI-9222 Connection Guidelines

  • Make sure that devices you connect to the NI-9222 are compatible with the module specifications.
  • You must use 2-wire ferrules to create a secure connection when connecting more than one wire to a single terminal on the NI-9222 with screw terminal and NI-9222 with snap in terminal.

Wiring for High-Vibration Applications

If your application is subject to high vibration, NI recommends that you use the NI 9971 backshell kit to protect connections to the NI-9222 with screw terminals or NI 9990 backshell kit to protect connections to the NI-9222 with snap in terminals.

You must follow these guidelines to meet the shock and vibration performance specifications stated in the device datasheet on ni.com/manuals.

  • Panel mount the system.
  • Provide strain relief for the module by securing the cabling to a supporting fixture no more than 8 cm (3 in.) away from the opening of the connector backshell.
  • Ensure that the supporting fixture for strain relief is stiff and rigidly coupled to the chassis mounting surface.
  • Use ferrules to terminate wires to the detachable connector.

Cable Requirements for EMC Compliance

Select and install cables for the NI-9222 with screw terminal and NI-9222 with snap in terminal in accordance with the following requirements:

  • Connect the cable shield to the chassis ground (grounding screw of the chassis) using the shortest length of wire possible.
  • Use shielded, twisted-pair cables (Belden 9451 or equivalent).
Figure 1. Cable Connections for NI-9222 with screw terminal and NI-9222 with snap in terminal for EMC Compliance