NI-9426 Getting Started

NI-9426 Pinout


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Table 1. Signal Descriptions
Signal Description
DI Digital input signal connection
NC No connection
Vsup Voltage supply connection

Connecting a Sinking-Output Device

You can connect 2- and 3-wire sinking-output devices to the NI-9426.


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The NI-9426 channel registers as ON when the sinking-output device drives the input below Vsup and meets the input ON range. If no device is connected to DI, the channel registers as OFF.

NI-9426 Block Diagram


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The NI-9426 has sourcing inputs. Sourcing inputs source current from Vsup to the sinking device connected to the NI-9426.

Tip For more information about sourcing inputs, visit ni.com/info and enter the Info Code sinksource.