Shin RS485 da CAT6 iri ɗaya ne?

Wannan yana ɗaya daga cikin abubuwan da suka fi rikitarwa a cikin ƙirar tsarin sadarwa na masana'antu. Duk da cewa kebul biyu suna aika bayanai ta amfani da nau'ikan biyu masu jujjuyawa, an ƙera su ne don dalilai daban-daban, suna aiki akan ƙa'idodin impedance daban-daban, kuma suna ba da sabis ga yanayi daban-daban na aikace-aikace.

RS485 (a hukumance TIA/EIA-485) daidaitaccen Layer na zahiri don sadarwa ta jeri a cikin yanayin masana'antu - tushen tsarin Modbus RTU, Profibus, da sauran tsarin bas. CAT6 wani Tsarin kebul mai tsari don hanyoyin sadarwa na Ethernet - tushen LAN na ofis da hanyoyin sadarwa na bayanai masu sauri.

Fahimtar waɗannan bambance-bambancen yana da matuƙar muhimmanci wajen ƙayyade kebul ɗin da ya dace da tsarin sarrafa kansa na masana'antu, guje wa kurakuran sadarwa, da kuma hana lalacewar filin mai tsada.

Kafin a fahimci takamaiman takamaiman kebul, yana da mahimmanci a fahimci wannan babban bambanci:

Tebur 1: RS485 vs CAT6 — Maɓallan Maɓalli

Halayen impedance shine mafi mahimmancin sigar lantarki guda ɗaya da ke bambanta kebul na RS485 daga kebul na CAT6.

RS485 yana buƙatar 120Ω ±10% kebul. Wannan ya dace da kebul Resistor na ƙarshe na 120Ω An sanya shi a ƙarshen bas ɗin biyu. Idan toshewar kebul ta yi daidai da ƙarshen, sigina suna tafiya ba tare da tunani ba.

CAT6 yana buƙatar 100Ω ± 15% kebul. Wannan ya dace da na'urorin watsawa na Ethernet waɗanda aka tsara don tsarin 100Ω.

Tebur na 2: Sakamakon Rashin Daidaito na Impedance

Gaskiyar Injiniya: Kebul na CAT6 zai iya haɗawa da na'urar RS485 ta amfani da adaftar, amma Rashin daidaiton impedance na 20Ω zai haifar da nunin sigina wanda ke lalata bayanai, musamman a nesa mai nisa ko kuma mafi girman ƙimar baud. Wannan shine dalilin da ya sa manyan shigarwar masana'antu koyaushe ke ƙayyade kebul mai dacewa 120Ω RS485.

Bambancin nisa mafi girma wataƙila shine mafi ban mamaki bambanci tsakanin waɗannan nau'ikan kebul.

Tebur na 3: Kwatanta Nisa da Ƙimar Bayanai

Me yasa RS485 ya wuce haka: Amfani da RS485 siginar bambanci da ƙarancin ƙimar bayanai (yawanci 9.6-115.2 kbps ga Modbus RTU). Ƙarancin mitar yana bawa siginar damar yin tafiya mai nisa kafin rage gudu ya zama matsala.

Me yasa CAT6 ya fi guntu: CAT6 yana aiki a cikin mitoci daga 1 MHz zuwa 250 MHz (na 1Gbps). Mitoci masu girma suna raguwa da sauri fiye da nisan da ke tsakaninsu, wanda hakan ke iyakance gudu mai amfani zuwa mita 100.

Ma'anar Aiki: Ga wani bene na masana'anta mai tsawon mita 500 tare da na'urori masu auna firikwensin da aka rarraba a duk faɗin wurin, RS485 shine kawai zaɓin da ya dace ta amfani da kebul na jan ƙarfe. CAT6 zai buƙaci masu canza fiber optic ko masu maimaitawa a kowace mita 100, wanda hakan ke ƙara farashi da sarkakiya sosai.

Muhalli na masana'antu suna da hayaniya ta wutar lantarki. VFDs, injuna, da kebul na wutar lantarki suna samar da EMI wanda zai iya lalata siginar sadarwa. Bukatun kariya suna nuna wannan bambanci.

Tebur na 4: Kwatanta Kariya don Aikace-aikacen Masana'antu

A Dingzun Cable, Siffar kebul ɗinmu ta RS485 garkuwar haɗin gwiwa - murfin foil na aluminum 100% tare da kitso mai launin jan ƙarfe da aka saka a cikin kwalba ≥85% rufewa - yana samar da ingantaccen kariya daga sama da 90 dB don ingantaccen sadarwa ko da kusa da VFDs da manyan injuna.

Ƙarfin wutar lantarki tsakanin masu jagoranci muhimmin siga ne wanda ke shafar matsakaicin tsawon kebul da ingancin sigina kai tsaye.

Tebur na 5: Kwatanta Ƙarfin Aiki

Kimiyya: Capacitance yana aiki kamar matatar da ba ta wuce ƙasa ba. Capacitance mai girma yana rage yawan siginar da ke fitowa daga wurare masu yawa, yana daidaita gefuna masu kaifi kuma yana haifar da kurakurai kaɗan a wurare masu nisa. Wannan shine dalilin da yasa ake amfani da kebul na RS485 rufin polyethylene (PE) (εᵣ = 2.3) maimakon PVC (εᵣ = 3.5-4.5).

Tebur na 6: Matrix Daidaita Amfani

A fannin fasaha: Eh, amma tare da ƙuntatawa mai tsanani.

Kebul na CAT6 zai iya ɗaukar siginar RS485 a zahiri. Dukansu suna amfani da nau'i-nau'i masu lanƙwasa. Dukansu za a iya kare su. Duk da haka:

Matsalolin:

Hukuncin: CAT6 na iya aiki akan RS485 a cikin ɗan gajeren lokaci. gajerun nisa (Amma ga ingantacciyar hanyar sadarwa ta masana'antu, musamman a tsawon nisa ko a cikin yanayi mai hayaniya ta wutar lantarki, koyaushe ƙayyade kebul na 120Ω RS485 mai dacewa.

A Dingzun Cable, Muna ƙera kebul na RS485 musamman don waɗannan aikace-aikacen masu wahala - tare da madaidaicin impedance 120Ω, ƙarancin ƙarfin rufin PE, da kuma kariyar haɗakarwa mai ƙarfi.

Lokacin da kake ƙayyade kebul na RS485 don aikinka, yi amfani da wannan jerin abubuwan da za a duba:

Tebur 7: Bukatun Musamman na Kebul na RS485

Ƙarfin Kebul ɗinmu na RS485:

Alƙawarin Fasaha namu ga Nasarar ku:

• Ƙungiyar injiniya ta ƙwararru don ƙirar hanyar sadarwa ta RS485 ta takamaiman aikace-aikace
• Sadarwa kai tsaye, ta ƙwararru daga ƙayyadaddun bayanai zuwa isarwa
• Musamman keɓancewa - ƙidayar ma'auni, ma'aunin jagora, nau'in kariya, kayan jaket, bugu na musamman
• Cikakken takardu gami da rahotannin gwaji, takaddun shaida, da kuma bin diddigin abubuwan da ke faruwa

Dalilin da yasa injiniyoyi suka zaɓi kebul na Dingzun don RS485:

Kuna buƙatar ingantacciyar hanyar sadarwa ta RS485 don hanyar sadarwar masana'antar ku?
[Tuntuɓi ƙungiyar fasaha tamu a yau don shawara ko neman samfurin da aka keɓance]