Ko te DT39 he tuku taumaha iti i whakawhanakehia mo nga waahi ahumahi e hiahia ana ki te tuku taumaha.
1. He iti te rahi o te kaiwhakawhiti, he mahi pumau, he mahi ngawari, me te atanga korero RS485.
2. Kei te whakamahia nuitia i roto i te whakauru raima, te whakarewa, te whakawhiti me te matū, te kai me te tukatuka kai, me era atu.