{"id":"hmi","model_id":"human-machine interface","name":"Human-Machine Interface","summary":"A human-machine interface is the hardware or software through which an operator interacts with a controller. It can be a physical control panel with buttons and indicator lights, or an industrial PC with a color graphics display running dedicated HMI software.","study_notes":["Source: NIST SP 800-82r3, from NISTIR 6859.","HMI implementations range from physical control panels to industrial PCs with dedicated HMI software."],"safety_notes":[],"sources":[{"url":"https://csrc.nist.gov/glossary/term/human_machine_interface","title":"human-machine interface - Glossary | CSRC","accessed":"2026-10-25"}],"verification":{"status":"source_checked","checked_at":"2026-10-25","values":2,"method":"llm_source_check"},"updated_at":"2026-10-25","type":"operational","spec":{"kind":"system","origin":"NIST SP 800-82r3 (from NISTIR 6859)","related":[]},"url":"https://machineschema.com/operational/hmi","license":"https://creativecommons.org/licenses/by/4.0/"}