Chii chinonzi RS-485 interface? Ndeapi maitiro ayo achienzaniswa neRS-232-C interface? Nekuda kwekutanga kutaridzika kweRS-232-C interface standard, pane zvisingadziviriki zvimwe zvinokanganisa, kunyanya zvinosanganisira zvinotevera mapoinzi mana: (1) Chiyero chechiratidzo chechiratidziro chakakwira, chiri nyore kukuvadza chip cheiyo interface yedunhu. , uye nekuti haienderane nedanho reTTL, zvinodikanwa kushandisa nhanho yekushandura dunhu kuti ubatanidze neTTL dunhu. (2) Chiyero chekufambisa chakaderera. Mune asynchronous kutapurirana, iyo baud mwero i20Kbps. (3) Iyo interface inoshandisa mutsara wechiratidzo uye chiratidzo chekudzoka mutsara kuumba yakajairika pasi pekutumira fomu. Uku kutapurirana kwepasi kwakajairwa kunowanzo kanganisa maitiro, saka kupindira kweruzha kuramba hakuna simba. (4) Iyo yekufambisa kureba ishoma. Huwandu hunokosha hwehurefu hwekutapurirana chinhambwe ndeye 50 tsoka, asi hunogona kungoshandiswa pamamita makumi mashanu chete. Tichifunga nezvekukanganisa kweRS-232-C, mamwe maitiro matsva akabuda, uye RS-485 imwe yacho. Iine maitiro anotevera: 1. Maitiro emagetsi eRS-485: logic "1" inomiririrwa nemusiyano wemagetsi pakati pemitsara miviri se + (2-6) V; Iyo logic "0" inomiririrwa nemusiyano wemagetsi pakati pemitsara miviri iri-(2-6) V. Chiyero chechiratidzo chechiratidzo chakaderera pane cheRS-232-C, saka hazvisi nyore kukuvadza chip cheiyo interface yedunhu, uye iyi nhanho inoenderana neTTL nhanho, iyo inogona kubatana zviri nyore neTTL dunhu. 2. Nhamba yepamusoro yekufambisa data yeRS-485 ndeye 10 MB PS3. Iyo RS-485 interface isanganiswa yemutyairi akaenzana uye anogashira anogashira, ayo anosimudzira anti-yakajairwa nzira yekukanganisa kugona, kureva, iyo anti-ruzha kupindira kugona kwakanaka. 4. Mutengo wehuwandu hwehuwandu hwekufambisa kureba kweRS-485 interface ndeye 4,000 tsoka, iyo inogona chaizvo kusvika 3,000 mamita. Mukuwedzera, RS-232-C interface inongobvumirwa kubatanidza imwe transceiver mubhazi, kureva, single station inokwanisa. Iyo RS-485 interface inobvumira kubatana kweanosvika 128 transceivers mubhazi. Ndiko kuti, ine kugona kweakawanda-zviteshi, kuitira kuti vashandisi vagone kumisa nyore network network nekushandisa imwechete RS-485 interface. RS-485 interface ndiyo inosarudzika serial interface nekuda kweiyo yakanaka anti-ruzha kupindira, kureba kwekufambisa kure uye kugona kwezviteshi zvakawanda. Nekuti iyo hafu-duplex network inoumbwa neRS485 interfaces inongoda waya mbiri chete, RS485 inopindirana yese inotora yakavharidzirwa yakamonyoroka kutapurirana. Iyo 9-core plug socket yeDB-9 inoshandiswa kune RS485 interface yekubatanidza, DB-9 (gomba) inoshandiswa kune interface ine hungwaru terminal RS485, uye DB-9 (pini) inoshandiswa pa keyboard interface RS485 yakabatana nekhibhodi.