Ubuchwepheshe, Electronics
I-RS-485 (i-interface-converter): umdwebo wokuxhumanisa nencazelo
I-RS-485 uhlobo loguqula olusetshenziselwa amanethiwekhi yezimboni. Ibuye isetshenziswe emigqeni yokuhlukanisa. Ukuguqulwa okuvame kakhulu kungokuxhuma kwe-USB. Isimiso se-element sakhiwe ekudluliseni kwedatha ngokuthumela ama-pulses aphansi.
Amathengi ahluke endaweni yokuqala ngokulandela ipharamitha yokumelana nokukhipha. Kufanele kuphawulwe ukuthi amamodeli akhiqizwa ngezinga elihlukile lemininingwane. Ukuze uziqonde ngokuningiliziwe, kubalulekile ukucubungula uhlelo lokuxhumeka lokuguqulwa.
I-standard converter wiring diagram
Uhlelo olujwayelekile lokuxhuma lomguquli luhlanganisa abaphikisana nabazilawulayo, kanye ne-expander. I-thyristor isetshenziswa kakhulu ngohlobo oluguquliwe. Ukuze ugweme ukulayisha ngokweqile kunethiwekhi, amapuleti asetshenziswa. Kwamanye amacala, ama-kenotrons enhlobo kagesi afakwe ukuze adlulisele isignali. Ingqikithi ingaba nama-capacitors angamahlanu esifundeni. Ngokwesilinganiso, impedance yokukhipha ayidluli 5.5 ohms. Uma sicabangela isikhombimsebenzisi sezimboni RS-485 esinokuhlukaniswa kwe-galvanic, khona-ke i-expander evander isetshenziswa lapho.
Isibonelo ngejubane lama-bits angu-100 ngomzuzwana
I-converter ye-RS-232/485 isikhombimsebenzisi salolu hlobo ixhunywe kuphela nge-transceiver. Kulesi simo, ubude besigaba esisodwa abudluli ku-1200 nm. Ngokwesilinganiso, ipharamitha yokusetshenziswa yamanje lilingana no-130 mA. Uma sicabangela umguquleli we-RS-485 we-Ethernet ngaphandle kokwandisa, bese isebenzisa i-amplifier ye-buffer.
Amadivayisi wokuxhumeka kwama-transceivers angaphezu kwamahlanu abalwa. Kulesi simo, ukuzinza kwesignali kuncike emandleni okuphatha okwamanje. Ikhebula le-RS-485 lesikhombimsebenzisi inikeza izinga lologi lwe-200 mV. Ukuzwela kwe-cascade kuncike kuphela kuhlobo lwe-transceiver.
Amadivaysi ama-300 bits ngomzuzwana
Ukuguqulwa kwalolu hlobo kuhloswe, njengomthetho, ukusekela okungaphezulu kwama-transceivers amahlanu. Ukuze uxhumane nenxenye ye-duplex, amadivayisi ahle. Izakhi zixhunyiwe kaningi nge-amplifier esemqoka. Kuphelele, akukho ama-capacitor angaphezu kwamathathu asetshenziselwa isifunda. Ngokwesilinganiso, isilinganiso sokukhula kwesignali kubaguquli asidluli 1 V nge-microsecond. Izandiso zisetshenziselwa uhlobo lokuzikhandla kuphela. Uma sicabanga nge-RS-422/485 (interface-converter) yamakhomodemu, bese isebenzisa i-kenotron kagesi. Ukungafani phakathi kwalezi zifunda kubonakala kaningi. Kumele kuqashelwe ukuthi izinga leyunithi elungile liyi-150 mV ngokwesilinganiso.
Amamodeli angu-600 ngekhondi
I-converter ye-RS-485 interface yalolu hlobo lwe-USB isetshenziselwa izintambo ze-modem. Ubude obude bezingxenye zalesikhathi ngu-1300 nm. Ukuze kudluliswe idatha ye-bidirectional, amadivayisi afaneleka kahle. Ngokwesilinganiso, ukuzwela kwe-cascade ku-transducers akudluli 210 mV. Izinga lokuphakama kwesignali liba ngu-1.2 V nge-microsecond.
Ukuguqulwa kungaxhunyaniswa nge-amplifier ye-buffer noma ukumelana. Uma sicabangela ukuhluka okuqala, khona-ke kulesi simo asikwazi ukwenza ngaphandle kwe-thyristor yocingo. Kubalulekile ukuthi uqaphele ukuthi i-capacitor ifaneleka kuphela ngokugqoka. Uma sicabanga nge-converter-isikhombimsebenzisi se-RS-485 USB enezinkinga, bese isebenzisa i-kenotron ye-electromagnetic. Kulesi simo, impedance yokuphuma kwesistimu iyashintsha cishe 4.6 ohms.
Amamodeli we-transceivers ayishumi
Abaguquli bama-transceivers angu-10 banesiphakamitha sokumelana okukhipha okuphezulu. Amadivaysi afanelekayo alolu hlobo ahamba phambili ekudluliseni kwedatha ye-bidirectional. Ipharamitha yamanje yokusebenzisa ingu-230 mA ngokwesilinganiso. Inani lokudluliswa kwedatha alidluli ama-bits angu-130 ngomzuzwana. Kuhlelo oluzenzakalelayo, amamodeli ayalungile.
Isilinganiso sokukhula kwesignali kubaguquli asidluli i-1.3 V nge-microsecond. Ukuzwela kwe-cascade kulokhu akubalulekile. Ukuxhumeka okuqondile kwamadivayisi kwenzeka ngokusebenzisa abaphikisi bomhlobo olawulwayo noma i-expander. Uma sicabangela ukhetho lokuqala, ngaleyo ndlela asikwazi ukwenza ngaphandle kwe-transceiver enamandla. Ukuxhumeka nge-expander, njengombuso, ukwandisa kakhulu izinga lezinga elihle.
Lolu hlelo nama-transceivers angu-13
I-converter ye-RS-232/485 isikhombimsebenzisi kuya kuma-transceivers angu-13 ixhunywe ngendwangu. Ngokwesilinganiso, ipharamitha yokusetshenziswa kwamanje kumadivayisi ayi-120 mA. Ukunciphisa ukumelana nokusetshenziswa kwamagciwane kusetshenziselwa ukunciphisa ingozi yokuphazamiseka . I-Thyristors ivame ukufakwa ngohlobo oluthintwayo.
Ngokuqondile uhlaka lusetshenziswa nge-amplifier. Ukuze ukudluliswa kwedatha kabili-duplex kulungile. Ngokwesilinganiso, ukumelana okukhipha kwala madivayisi akudlula i-4.5 ohms. Ukuzwela kwe-cascade kuleli cala akungekho kuka-170 mV.
Abaguqula ama-50 mA
I-RS-485 (i-interface-converter) ye-50 mA ifanele kuphela izinhlelo ezizenzakalelayo. Isici esiyingqayizivele samamodeli yizinga eliphezulu lokudlulisa idatha. Ukuxhumana ngokuqondile kokuguqulwa kwenziwa nge-isolation ye-galvanic. Kulokhu, ukuzwela kwe-cascade akudluli ku-150 mV. Izinga le-zero elinengqondo liyi-230 mV. Uma sicabangela amadivaysi e-exchange-data exchange exchange, i-expander yabo iwuhlobo lomfutho. Kanti, i-transceiver ifaneleka kuphela ngokuguquguqukayo.
Abaguquli 120 mA
I-RS-485 (i-interface-converter) ye-120 mA ixhunywe nge-duplex transistors. Uma sicabangela ukulungiswa ngehlelo lokubonisa, basebenzisa i-transceiver enamandla. Ngokushintshaniswa kwehafu ye-duplex, la madivayisi asebenza kahle. Kuphelele, kungenzeka ukuxhuma okungaphezulu kwama-transceivers ayishumi. Njengomthetho, izinga leyunithi elungile alidluli i-130 mV.
Kulesi simo, inani labashayeli lixhomeke emandleni e-amplifier esemqoka. I-expander imayelana nhlobo uhlobo lokucindezela. Ubude obude besigaba esisodwa ngu-1300 ns. Ngezinhlelo zokuzenzekelayo, amadivayisi asebenza kahle. Izinga lokukhula kwesignali, njengomthetho, alidluli 1.1 V nge-microsecond.
Amadivayisi we-half-duplex
I-RS-485 (i-interface-converter) uhlobo lwesigamu se-duplex liyakwazi ukuxhuma ngokusebenzisa i-transistor yekhodi. Ngalesi sizathu, i-thyristor isetshenziswa nge-amplifier enkulu. I-transceiver isetshenziswe kokubili njengendlela eguquguqukayo nensimu. Ukuphikiswa okukhiphayo esifundeni akudluli 5.4 ohms. Isilinganiso samanje samanje singama-130 mA. Isibonakaliso sokuthola idatha kuleli cala siyisilinganiso.
Inani lokudluliswa kwefayela alidluli ama-bits angu-100 ngomzuzwana. Ukuzwela kwe-cascade kusezingeni le-230 mV. Kubalulekile ukuthi uqaphele ukuthi uxhumano lomguquli lungenziwa nge-expander esinqunyiwe. Kulokhu, ukumelana kungokwenhlobo eguquguqukayo. Ngokuqondile i-thyristor isetshenziswa nge-amplifier eshintshiwe. Kukhona ama-capacitors amathathu esifundeni.
Ukuguqulwa okuhlukile
I-RS-485 ehlukile (i-interface-converter) isetshenziselwa kuphela izintambo ze-modem. Isibonakaliso sokuthola idatha kuleli cala sinikeziwe. Ukunikezwa kwamandla kwabaguqula kungena nge-Yusb-port. Amanothi amaningi asekela "iWindows 7" ne-XP. Ukusetshenziswa kwamanje kulingana no-190 mA. I-unit unit enobuhlakani ayikho ngaphezu kwe-90 mV.
Ukuxhuma imishini esetshenzisiwe hhayi kuphela izikhwama, kodwa futhi amasimu field. Izinga le-zero logic, njengombuso, alidluli 120 mV. Ijubane lesikhulumi sezitshalo kuloluhlobo lwenhlobo luphezulu kakhulu. Inkomba yomzwelo we-converter-interface ehlasela i-RS-485 (RS-232) ifika ku-170 mV. Isilinganiso sokunyuka kwesignali asidluli i-1.2 V nge-microsecond.
Ukuxhumeka nge-expander yokusebenza
Uma sicabangela uhlelo lokuxhumanisa nge-amplifier yokusebenza, kubalulekile ukuthi uqaphele ukuthi i-parameter yamanje yokusetshenziswa akumele idlulele ku-200 mA. Ekuqaleni kwesifunda yibhokisi lokugcina. I-thyristor isetshenziselwa kuphela ama-capacitors ambalwa. Ngokuphelele, uhlelo luhlinzeka ngamacwecwe amabili. I-transistor ifanele kuphela uhlobo lwekhodi. Kulesi simo, i-unit unit level ayidluli 150 mV. Ama-amplifiers we-Buffer alawa ma-circuits awafanelekile. Ngokuphelele, kuvunyelwe ukuxhuma kuma-transducers okungaphezu kwama-transceivers ayisithupha.
Isiguquli kanye nomxhasi ophelelwe yedwa
I-converter ye-RS-485 isikhombimsebenzisi ngokukhula okungapheli kuyadingeka kumakhodi we-modem. Uhlelo lokubonisa idatha lwamamodeli luhlinzekwa ngohlobo lwe-diode. Ngokwesilinganiso, ukusetshenziswa kwamanje akudluli 230 mA. Amadivayisi kuphela afaneleka ekukhulumisaneni kwesigamu se-duplex. Isivinini sokudluliswa kolwazi asidluli ama-bits angu-120 ngomzuzwana.
Kubalulekile ukuthi uqaphele ukuthi amamodeli asebenzisa uhlelo lokuvikela olwedlule. Idivayisi enikwe amandla ngokuqondile ivela ku-Yusb-port. Ukuzwela okuvamile kwesibhamu kuyinto 160 mV. Ijubane lesikhulumi sezitshengiselo kulezi zibonelo liphakeme kakhulu. I-transceiver e-galvanic interchanges, njengombuso, isetshenziswe uhlobo oluguquguqukayo. Isembozo sisetshenziswa kakhulu nge-amplifier ye-buffer. I-interface ye-splitter i-RS-485 impedance yokukhipha ingekho ngaphezu kuka-5.8 Ohm.
Isicelo sama-resistors evulekile
Amadivaysi ane-resistors evulekile akhiqizwa ngo-120 no-200 mA. Ukuxhumeka okuqondile kungena ebhokisini lokugcina. Ukunikezwa amandla kwamamodeli kungena nge-YUSP-port. I-485 interface converter ifaneleka ukukhulumisana kwesigamu-duplex. Ama-amplifiers we-trunk ajwayelekile kakhulu kumahlelo alolu hlobo. Izandiso zivame ukusetshenziselwa uhlobo lokuzikhandla. Ngokwesilinganiso, izinga leyunithi enengqondo ayikho ngaphezu kwe-135 mV. Ubude obuningi besigaba esisodwa buguquka cishe ngo-1300 nm.
Ukusebenzisa Umthumathili Wama-Wave
Ukuguqulwa ngama-transceivers wamagagasi afaneleka kokubili ukushintshaniswa kwemininingwane ye-duplex ne-bi-directional. Inani lokudlulisa ulwazi kuleli cala liphathelene nama-230 bits ngomzuzwana. Ngokuphelele, idivayisi ingakwazi ukusekela mayelana nama-transceivers ayishumi. Ngokwesilinganiso, ubude besigaba esisodwa abudluli ku-1400 nm. Kanti, ukumelana okukhiphayo ngu-5.1 ohms. Izinga lokukhula kwesignali kulokhu lixhomeke kuhlobo lwe-amplifier.
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