How do the Digital Input (DI) and Digital Output (DO) interfaces work?

DI (Digital Input): Supports an input voltage of 0-30V. 0-3V is considered "low," and 10-30V is "high." The maximum input current is 100mA.

DO (Digital Output): It is a wet contact output with resistor pull-up. Low level is 0V, and high level is 12V. It does not have drive capability; if you need to drive external equipment like a relay, an external power supply with drive capability is required.