NI-9269 Getting Started

NI-9269 Block Diagram


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The analog output channels are floating with respect to earth ground and each other. Each channel has a digital-to-analog converter (DAC) that produces a voltage signal. Each channel provides an independent signal path, enabling you to update all four channels simultaneously. Each channel also has overvoltage and short-circuit protection.

NI-9269 Pinout


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Table 1. Signal Descriptions
Signal Description
AO+ Positive analog output signal connection
AO- Negative analog output signal connection

Analog Output Connections


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NI-9269 Connection Guidelines

  • Make sure that devices you connect to the NI-9269 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-9269.

High-Vibration Application Connections

If your application is subject to high vibration, NI recommends that you follow these guidelines to protect connections to the NI-9269:

  • Use ferrules to terminate wires to the detachable connector.
  • Use the NI-9971 connector backshell kit.

Increasing Output Voltage Range

Each channel of the NI-9269 has a nominal output range of ±10 V and can drive up to ±10 mA of current. The total output current of all channels is limited to ±20 mA. For example, if the output current of AO0 is ±10 mA, the output current of AO<1, 2, 3> is limited to ±10 mA total or ±3.33 mA each.

If you want to increase the nominal output voltage range, you can stack up to four output channels for a maximum of ±40 V nominal. For example, if you want two channels with a nominal output voltage range of ±20 V each, connect AO<0, 1> and AO<2, 3>. The output current of the stacked channels flows across two channels, limiting the total output current to ±10 mA.

Figure 1. Increasing the Output Voltage Range of the NI-9269

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Stacking more than four output channels of multiple NI-9269 modules violates the electrical safety and overvoltage protection ratings.

Because the NI-9269 outputs can source and sink current, it is not possible to increase the current drive by connecting output channels in parallel.

Note Refer to the module specifications on ni.com/docs for more information about the overvoltage protection rating.

Conformal Coating

The NI-9269 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-9269 Safety, Environmental, and Regulatory Information, the NI-9269 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