What internal processing occurs of the DI input (non-voltage contact input) from the universal input module and DCV/TC/DI modules?

The voltage generated when a burnout current of 4.2 mA flows to the measuring terminal circuit is measured in the 60 mV range, and a determination is made. If 42 mV (10 kΩ) or more, the result is 0 (open). If less than that, 1 (closed).

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