Ni ubuhe buryo RS-485? Ni ibihe bintu biranga ugereranije na RS-232-C? Bitewe no kugaragara hakiri kare ya RS-232-C yimbere, haribuze byanze bikunze hari ibitagenda neza, cyane cyane harimo ingingo enye zikurikira: (1) Urwego rwibimenyetso rwimbere ni rwinshi, byoroshye kwangiza chip yumuzunguruko. , kandi kubera ko bidahuye nurwego rwa TTL, birakenewe gukoresha urwego rwo guhindura urwego kugirango uhuze na TTL umuzenguruko. (2) Igipimo cyo kwanduza kiri hasi. Mu kwanduza kwa asinchronous, igipimo cya baud ni 20Kbps. . Ihererekanyabubasha rusange rishobora guhura nuburyo busanzwe bwo guhuza, bityo kurwanya urusaku birwanya intege nke. (4) Intera yoherejwe ni ntarengwa. Agaciro gasanzwe intera ntarengwa yoherejwe ni metero 50, ariko irashobora gukoreshwa kuri metero 50 gusa. Urebye ibitagenda neza kuri RS-232-C, hagaragaye amahame mashya yimbere, kandi RS-485 nimwe murimwe. Ifite ibintu bikurikira: 1. Ibiranga amashanyarazi ya RS-485: logique "1" igereranwa n’itandukaniro rya voltage hagati yimirongo ibiri nka + (2-6) V; Logic "0" igaragazwa nu tandukaniro rya voltage hagati yimirongo ibiri iri- (2-6) V. Urwego rwibimenyetso rwimbere ruri munsi yurwo RS-232-C, ntabwo rero byoroshye kwangiza chip ya Imigaragarire yumuzingi, kandi urwego ruhujwe nurwego rwa TTL, rushobora guhuzwa byoroshye na TTL umuzenguruko. 2. Igipimo kinini cyo kohereza amakuru ya RS-485 ni 10 MB PS3. Imigaragarire ya RS-485 ni ihuriro ryumushoferi uringaniye hamwe niyakira itandukanye, byongera ubushobozi bwo kurwanya uburyo busanzwe bwo kwivanga, ni ukuvuga ubushobozi bwo kurwanya urusaku nibyiza. 4. Agaciro gasanzwe kerekana intera ntarengwa ya RS-485 ni metero 4000, zishobora kugera kuri metero 3.000. Mubyongeyeho, interineti RS-232-C yemerewe gusa guhuza transceiver imwe muri bisi, ni ukuvuga ubushobozi bwa sitasiyo imwe. Imigaragarire ya RS-485 yemerera guhuza abagera kuri 128 muri bisi. Ni ukuvuga, ifite ubushobozi bwa sitasiyo nyinshi, kuburyo abakoresha bashobora gushiraho byoroshye umuyoboro wibikoresho ukoresheje interineti imwe RS-485. Imigaragarire ya RS-485 niyo interineti ikunzwe kubera uburyo bwiza bwo kurwanya urusaku, intera ndende yoherejwe hamwe nubushobozi bwa sitasiyo nyinshi. Kuberako igice cya duplex kigizwe nintera ya RS485 mubisanzwe ikenera insinga ebyiri gusa, RS485 interineti yose ifata ikingira ikingira ikwirakwizwa. 9-core plug sock ya DB-9 ikoreshwa kuri RS485 ihuza interineti, DB-9 (umwobo) ikoreshwa kuri interineti hamwe na terefone ifite ubwenge RS485, naho DB-9 (pin) ikoreshwa kuri clavier ya RS485 ihujwe na clavier.