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Signal Description Digital input/output signal connection Ground connection Connecting Digital Devices to the NI-9402 You can connect digital devices to the NI-9402. Figure 1. Connecting Digital Devices to the NI-9402 DIO0 as Input TTL Signal DIO1 as Input +5 V Switch +3.3 V...
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NI-9402 Getting Started through a 50 Ω BNC cable. You can configure each DIO channel of the NI-9402 in software for input or output. Changing the direction on any channel will not affect the direction on the other channels. Refer to the software help for information about configuring channel direction.
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