Connecting Differential Devices

You can connect differential devices to the NI-9361. For differential connections, connect the positive device out to the DI+ terminal on the NI-9361 and the negative device out to the DI- terminal on the NI-9361.

The NI-9361 measures the difference between the DI+ and DI- terminals to determine if that difference is greater or less than the digital logic levels. If the difference between the terminals is within the input high range, the channel registers as high. If the difference between the terminals is within the input low range, the channel registers as low.