RS-232 cable: hauj lwm, niznachenie, specifications

Nruj me ntsis hais lus, RS-232 cable - yog lub npe ntawm tus txheej txheem uas qhia txog interface thiab connectivity los ntawm lub PC rau cov ntaus ntawv cov ntaub ntawv. RS - pom zoo standard, txhais li "pom zoo standard", thiab 232 - cov hom xov tooj. Nws yog tsim nyob rau hauv lub 60s ntawm lub xeem caug xyoo. Niaj hnub no, ib tug tshiab version ntawm cov txuj no, uas tau txais nyob rau hauv 1991 lub koom haum ntawm telecommunication thiab electronics industries, yog lub npe hu ua EIA / tia-232-E. Txawm li cas los, feem ntau ntawm cov neeg siv cov lub npe "RS-232 cable," uas nrees "rooted" mus rau lub interface.

Qhov saum toj no interface muab ib tug compound ntawm lub nram qab no: DTE (Cov ntaub ntawv Terminal khoom) - lub DTE (Cov ntaub ntawv Terminal khoom), thiab dce (Cov ntaub ntawv Communications khoom) - CPD (cov ntaub ntawv kis tau tus mob khoom). Nyob rau hauv DTE feem ntau txhais tau tias koj tus kheej lub computer, thiab nyob rau hauv lub CAP - lub modem. Txawm hais tias RS-232 cable kuj yog siv mus txuas rau lub PEOM lwm peripherals (tshuab luam ntawv, nas, thiab hais txog. D.), Thiab mus txuas rau lwm yam computers los yog controllers. Nws yog ib qho tseem ceeb kom nco ntsoov lub dce thiab cov DTE designations, raws li lawv yog siv nyob rau hauv lub npe ntawm interface Pib ntsais koj teeb thiab pab nrog qhov kev piav qhia ntawm lub ntaus ntawv yuav tsum tau.

Chiv, RS-232 cable muaj ib tug 25-pin connector hom DB25. DTE hom apparatus mated connector-ntsawb ( "niam"). Tom qab ntawd lawv pib siv lub "txiav-down" version ntawm lub interface nrog 9-tus pin DB9. Qhov no hom ntawm cable yog ib qho nyob rau hauv peb hnub.

Cov xov ntawm lub RS-232 cable

Hauv qab no lub davhlau ya nyob twg ntus 9 kontaktngo hom DB9 connector. Daim ntawv qhia tau hais tias cov connector pinout ( "txiv") cov ntaub ntawv ua cov khoom xws li ib tug tus kheej lub computer. Rosette cov ntaub ntawv kis tau tus mob ntaus unsoldering li hais tias ob connectors yog koom ntawm ib tug cable los yog ncaj qha "hu nyob rau hauv kev sib cuag".

1. Carrier Ntes - lub xub ntiag ntawm cov cab kuj zaus.

2. Tau txais ntaub ntawv - tau txais cov ntaub ntawv.

3. Kis ntaub ntawv - cov ntaub ntawv raug kis.

4. Cov ntaub ntawv Terminal Npaj - npaj txhij LTD.

5. Teeb liab av - tag nrho.

6. Cov ntaub ntawv teeb Nyeem - zoo siab hlo ua HPD.

7. Thov Kom Xa - lub hloov lwm lub tsev thov.

8. ClearToSend - npaj xa.

9. nplhaib qhia - lub xub ntiag ntawm lub hu teeb liab.

Cov ntaub ntawv yog kis tau los ntawm circuits RD thiab TD. Qhov seem circuits yog tsim los tso saib tus txheej xwm DTR thiab DSR pab kiag li lawm, kis tau tus mob tswj CTS thiab RTS, raws li zoo raws li cov xwm txheej zaub RI thiab CD kab. Tsuas yog thaum kev cob cog rua rau ib tug lub PC uas siv ib tug sab nraud modem, ib tug tag nrho teev ntawm chains. Thaum txuas mus rau lwm yam peripherals xws li controllers los yog tus nas, siv xim Circuit Court yuav tsum tau rau cov tej khoom. Lawv nyob ntawm seb cov kev kho vajtse thiab software ntawm tus dais.

Hauj lwm thiab kev tsis

Standard kom meej meej txhais lub siab tshaj plaws tau ntev ntawm lub RS-232 cable - 15 meters ntawm ib cov ntaub ntawv nqi ntawm 9600 ntsis / s. Txawm li cas los, nyob rau hauv kev xyaum nws qhia tau tseeb hais tias ruaj khov lag luam yog tiav thiab nyob ib tug ntau dua ntev ntawm cov hlau. Nws yog ntseeg hais tias daim ntawv thov ntawm ib tug unshielded cable ntev yuav muab ntau zog mus rau 30 meters, thiab thaum twg siv ib shielded - mus txog rau 75 meters. Thiab qhov no tsis tau poob cov ntaub ntawv tus nqi. Yog hais tias ib tug tsawg dua ceev yog hais txog ob zaug, cov cable ntev zog thiab ob npaug. Nws yog pom zoo kom siv ib tug cable-raws li cov-khub cable, nyob rau hauv xws li ib tug cov ntaub ntawv, txhua lub teeb liab kab yog ua khub nrog ib tug ntau hlau. Nws tsis pom zoo kom muab cov cable ntaub thaiv npog rau cov teeb liab.

Koj muaj peev xwm feem ntau nrhiav tau RS-232- USB cable. Nws yog ib tug txheej txheem interface rau ib kawg uas siv ib tug USB connector.