Hauv Is Taws Nem ntawm Kev Lag Luam, tsuav yog koj yog tus kws tshaj lij kos duab, feem ntau koj yuav raug xa mus rau RS232, RS485, TTL cov ntsiab lus no.
Puas yog koj tau ntsib lub tswv yim no ntawm Baidu tshawb nws, hauv qab no rau koj los npaj RS232 thiab RS485, TTL interface sib txawv.
Cov yam ntxwv hluav taws xob ntawm RS232 interface Qhov voltage ntawm ib qho teeb liab kab hauv RS-232-C yog qhov kev sib raug zoo tsis zoo.
Ntawd yog, qhov laj thawj "1" yog -3 rau -15V, thiab qhov laj thawj "0" yog los ntawm 3 txog 15V.RS-232-C connectors feem ntau yog qauv DB-9 plug tuav, feem ntau plugs ntawm DCE kawg thiab sockets ntawm DTE kawg.RS-232 chaw nres nkoj ntawm PC yog 9-core koob socket.Qee cov khoom siv txuas nrog RS-232 interface rau PC vim tias yuav tsum muaj peb txoj kab sib txuas nkaus xwb, xws li "xa cov ntaub ntawv TXD", "tau txais cov ntaub ntawv RXD" thiab "cov teeb liab-rau-hauv av GND" yam tsis tas siv lub teeb liab tswj kev sib kis. lwm tog.
RS-232 kis tau tus mob cable siv ib tug shielded twisted khub.
Cov yam ntxwv hluav taws xob ntawm RS485 (tam sim no feem ntau siv interfaces) RS485 siv cov teeb liab sib txawv tsis zoo, lub logic ntawm "1" yog sawv cev los ntawm qhov sib txawv ntawm ob kab raws li -(2 txog 6) V, thiab cov logic "0" yog sawv cev los ntawm qhov sib txawv voltage ntawm ob kab raws li ntxiv (2 mus rau 6) V. Lub interface teeb liab theem qis dua THE RS-232-C, nws tsis yooj yim rau kev puas tsuaj rau lub interface Circuit Court nti, thiab qib no yog sib xws nrog TTL theem, tuaj yeem txuas tau yooj yim rau TTL Circuit Court.
RS-485 muaj qhov siab tshaj plaws cov ntaub ntawv hloov pauv ntawm 10Mbps.
TTL theem TTL theem teeb liab feem ntau yog siv vim cov ntaub ntawv ib txwm sawv cev yog binary, nrog 5V sib npaug rau logic "1" thiab 0V sib npaug rau logic "0", uas yog hu ua ttl (transistor-transistor logic theem Transistor-Transistor Logic) teeb liab qhov system.
Qhov no yog cov txheej txheem thev naus laus zis rau kev sib txuas lus ntawm qhov chaw ntawm lub cuab yeej tswj hwm los ntawm lub khoos phis tawj processor.
Qhov txawv ntawm RS232 thiab RS485, TTL
1, RS232, RS485, TTL yog hais txog qib tus qauv (hluav taws xob teeb liab)
2, TTL qib tus qauv yog qib qis 0, qib siab yog 1 (hauv av, tus qauv digital circuit logic).
3, RS232 qib tus qauv yog qib zoo ntawm 0, qhov tsis zoo ntawm 1 (rau hauv av, qhov zoo thiab qhov tsis zoo 6-15V tuaj yeem ua tau, thiab txawm tias muaj lub siab tsis kam).4, RS485 thiab RS232 yog qhov zoo sib xws, tab sis kev siv cov teeb liab sib txawv ntawm qhov sib txawv, tsim nyog rau kev ncua deb, kev sib kis ceev.
Post lub sij hawm: Jul-24-2019