NI-9220 Getting Started
- Updated2024-02-14
- 4 minute(s) read
NI-9220 Getting Started
Connector Types
The NI-9220 has more than one connector type: NI-9220 with spring terminal and NI-9220 with DSUB. Unless the connector type is specified, NI-9220 refers to all connector types.
The NI-9220 with spring terminal is available in two types: push-in spring terminal and spring terminal. The push-in type spring terminal connector is black and orange. The spring terminal connector is black. NI-9220 with spring terminal refers to both types unless the two types are specified. Differences between the two types of spring terminal connectors are noted by the connector color.
NI-9220 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-9220 Spring Terminal Pinout
| Signal | Description |
|---|---|
| AI+ | Positive analog input signal connection |
| AI- | Negative analog input signal connection |
| COM | Common reference connection to isolated ground |
NI-9220 Push-In Spring Terminal Pinout
| Signal | Description |
|---|---|
| AI+ | Positive analog input signal connection |
| AI- | Negative analog input signal connection |
| COM | Common reference connection to isolated ground |
NI-9220
DSUB Terminal Pinout
| Signal | Description |
|---|---|
| AI+ | Positive analog input signal connection |
| AI- | Negative analog input signal connection |
| COM | Common reference connection to isolated ground |
NI-9220
Grounded Differential Connections
NI-9220
Floating Differential Connections
Connect the negative lead to COM through a 1 MΩ resistor to keep the signal source within the common-mode voltage range. The NI-9220 does not read data accurately if the signal source is outside of the common-mode voltage range.
NI-9220
Single-Ended Connections
Connect the ground signal to COM to keep the signal source within the common-mode voltage range.
NI-9220 Connection Guidelines
Make sure that devices you connect to the NI-9220 are compatible with the module specifications.
Connecting to a Spring-Terminal Connector
What to Use
- NI-9220 spring-terminal connector
- 0.08 mm2 to 1.0 mm2 (28 AWG to 18 AWG) copper conductor wire with 7 mm (0.28 in.) of insulation stripped from the end
- Flathead screwdriver with a 2.3 mm x 1.0 mm (0.09 in. x 0.04 in.) blade, included with the NI-9220
What to Do
Complete the following steps to connect wires to the spring-terminal connector.
- Insert the screwdriver into a spring clamp activation slot to open the corresponding connector terminal.
- Press a wire into the open connector terminal.
- Remove the screwdriver from the activation slot to clamp the wire into place.
High-Vibration Application Connections
If your application is subject to high vibration, NI recommends that you use the NI-9940 backshell kit to protect connections to the NI-9220 with spring terminal.
Conformal Coating
The NI-9220 is available with conformal coating for additional protection in corrosive and condensing environments, including environments with molds and dust.
In addition to the environmental specifications listed in the NI-9220 Safety, Environmental, and Regulatory Information, the NI-9220 with conformal coating meets the following specification for the device temperature range. To meet this specification, you must follow the appropriate setup requirements for condensing environments. Refer to Conformal Coating and NI RIO Products for more information about conformal coating and the setup requirements for condensing environments.
| Operating humidity (IEC 60068-2-30 Test Db) | 80 to 100% RH, condensing |