A cikin masana'antar Intanet na Abubuwa, muddin kai injiniya ne wanda aka haɗa, gabaɗaya za a fallasa ka ga RS232, RS485, TTL waɗannan dabarun.
Shin kun ci karo da wannan ra'ayi akan Baidu bincika shi, ƙasa don tsara RS232 da RS485, bambance-bambancen mu'amalar TTL.
Halayen lantarki na RS232 dubawar wutar lantarki na kowane layin sigina a cikin RS-232-C dangantaka ce mara kyau.
Wato ma'anar "1" shine -3 zuwa -15V, kuma ma'anar "0" tana daga 3 zuwa 15V.Masu haɗin RS-232-C gabaɗaya ana yin su ne masu riƙe da filogi na DB-9, yawanci matosai a ƙarshen DCE da kwasfa a ƙarshen DTE.Tashar RS-232 na PC ita ce soket ɗin allura mai lamba 9.Wasu na'urorin ana haɗa su da haɗin RS-232 zuwa PC saboda layi uku kawai ake buƙata, wato "aika data TXD", "karɓan bayanai RXD" da "sigina-zuwa-ƙasa GND" ba tare da amfani da siginar sarrafa watsawa ta hanyar sadarwa ba. sauran jam'iyyar.
Kebul na watsawa na RS-232 yana amfani da garkuwar murɗaɗɗen biyu.
Halayen lantarki na RS485 (yanzu mafi yawan musaya da ake amfani da su) RS485 yana amfani da dabaru mara kyau na sigina, dabarar “1” tana wakilta ta bambancin ƙarfin lantarki tsakanin layin biyu kamar -(2 zuwa 6) V, da ma’anar “0” Ana wakilta ta da bambancin wutar lantarki tsakanin layi biyu kamar ƙari (2 zuwa 6) V. Matsayin siginar siginar ya kasance ƙasa da THE RS-232-C, ba shi da sauƙi don lalata guntuwar kewayawa, kuma wannan matakin ya dace da matakin TTL, ana iya haɗa shi cikin sauƙi zuwa da'irar TTL.
RS-485 yana da matsakaicin adadin canja wurin bayanai na 10Mbps.
An fi amfani da siginar matakin matakin TTL saboda yawancin wakilcin bayanai na binary ne, tare da 5V daidai da dabaru “1″ da 0V daidai da dabaru “0″, wanda aka sani da ttl (Transistor-transistor Logic level Transistor-Transistor Logic) sigina tsarin.
Wannan ita ce daidaitattun fasaha don sadarwa tsakanin sassan na'urar da na'urar sarrafa kwamfuta ke sarrafawa.
Bambanci tsakanin RS232 da RS485, TTL
1, RS232, RS485, TTL yana nufin daidaitaccen matakin (siginar lantarki)
2, Matsayin matakin TTL shine ƙananan matakin 0, babban matakin shine 1 (ƙasa, madaidaicin dabarun kewaya dijital).
3, RS232 matakin ma'auni shine ingantaccen matakin 0, matakin mara kyau na 1 (zuwa ƙasa, tabbatacce da korau 6-15V na iya zama, har ma da yanayin juriya mai girma).4, RS485 da RS232 suna kama da juna, amma amfani da dabaru na sigina daban-daban, sun fi dacewa da nisa, watsa sauri mai sauri.
Lokacin aikawa: Yuli-24-2019