NI-9320 User Manual

The NI-9320 User Manual provides detailed descriptions of the product functionality and the step by step processes for use.

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Connector Types

The NI-9320 has more than one connector type: NI-9320 with spring terminal and NI-9320 with DSUB. Unless the connector type is specified, NI-9320 refers to all connector types.

NI-9320 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-9320 Push-In Spring Terminal Pinout

Table 1. Signal Descriptions
Signal	Description
AI+	Positive analog input signal connection
AI-	Negative analog input signal connection
COM	Common reference connection to isolated ground

NI-9320 with DSUB Pinout

Table 2. Signal Descriptions
Signal	Description
AI+	Positive analog input signal connection
AI-	Negative analog input signal connection
COM	Common reference connection to isolated ground

NI-9320 Grounded Differential Connections

NI-9320 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-9320 does not read data accurately if the signal source is outside of the common-mode voltage range.

NI-9320 Single-Ended Connections

Connect the ground signal to COM to keep the signal source within the common-mode voltage range.

NI-9320 Connection Guidelines

Make sure that devices you connect to the NI-9320 are compatible with the module specifications.

Connecting Wires to the NI-9320 with Push-in Spring Terminal (Black/Orange Connector)

What to Use

NI-9320 with spring terminal (black/orange connector)
0.14 mm² to 1.5 mm² (26 AWG to 16 AWG) copper conductor wire with 10 mm (0.394 in.) of insulation stripped from the end
Ferrules (optional)

What to Do

Refer to the following table for how to insert a wire into a terminal depending on what type of wire you are using or if you are using a ferrule.

Option	Description
When using a solid wire or stranded wire with a ferrule	Push the wire into the terminal when using a solid wire or stranded wire with a ferrule
When using a stranded wire without a ferrule	Press the push button and then push the wire into the terminal

Note You must use 2-wire ferrules to create a secure connection when connecting more than one wire to a single terminal.

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-9320 with spring terminal.