Ọdụ ụgbọ mmiri nkwukọrịta RS485 bụ nkọwa ngwaike nke ọdụ ụgbọ mmiri nkwukọrịta.Ụdị wiring nke ọdụ ụgbọ mmiri RS485 dị na topology ụgbọ ala, enwere ike ijikọ ọnụ ọnụ 32 na otu ụgbọ ala ahụ.Na netwọk nkwukọrịta RS485 na-anabatakarị ụdị nkwurịta okwu nna-ukwu-ohu, ya bụ, onye ọbịa nwere ọtụtụ ohu.N'ọtụtụ oge, njikọ nkwurịta okwu rS-485 na-ejikọta ya na njedebe "A" na "B" nke ọ bụla nwere eriri abụọ gbagọrọ agbagọ.Njikọ mbufe data a bụ ọkara - ọnọdụ nkwurịta okwu duplex.Ngwa nwere ike izipu ma ọ bụ nata data n'oge enyere.Mgbe emechara nzikọrịta ozi ngwaike, ọ dị mkpa ka ekwenye usoro data n'etiti ngwa nnyefe data ka njedebe nke nnata wee kpachapụta data enwetara, nke bụ echiche nke "protocol".Usoro nzikọrịta ozi nwere usoro ọkọlọtọ ejikọtara ọnụ, ngwaahịa anyị niile na-ejikwa ọkọlọtọ Modbus-RTU ọkọlọtọ.Rs-485 kacha anya nkwurịta okwu bụ ihe dị ka 1219m, na obere ọsọ, dị anya, ọ dịghị nnyonye anya oge nwere ike iji nkịtị gbagọrọ agbagọ-pair ahịrị, n'ụzọ megidere, na elu na-agba, ogologo ahịrị nnyefe, ọ ga-eji impedance matching (n'ozuzu 120 ω). ) RS485 USB pụrụ iche, yana na gburugburu nnyonye anya siri ike, ekwesịrị ijikwa eriri mkpuchi mkpuchi mkpuchi mkpuchi ihu abụọ.
Oge nzipu: Jul-22-2022