Kodi RS485 ndi CAT6 ndi zofanana?

Ichi ndi chimodzi mwa zinthu zomwe zimasokoneza kwambiri kapangidwe ka makina olumikizirana m'mafakitale. Ngakhale kuti zingwe zonse ziwiri zimatumiza deta pogwiritsa ntchito ma twisted pairs, zimapangidwa kuti zikhale ndi zolinga zosiyana, zimagwira ntchito pamiyezo yosiyanasiyana ya impedance, ndipo zimagwira ntchito zosiyanasiyana.

RS485 (yomwe kale inkadziwika kuti TIA/EIA-485) ndi muyezo wa mawonekedwe akuthupi polumikizirana motsatizana m'malo opangira mafakitale — maziko a Modbus RTU, Profibus, ndi machitidwe ena a fieldbus. CAT6 ndi njira yolumikizirana yotsatizana m'malo opangira mafakitale. muyezo wokhazikika wa zingwe kwa ma network a Ethernet — maziko a ma LAN aofesi ndi ma network a data othamanga kwambiri.

Kumvetsetsa kusiyana kumeneku ndikofunikira kwambiri posankha chingwe choyenera cha makina anu oyendetsera mafakitale, kupewa zolakwika zolumikizirana, komanso kupewa kulephera kwamagetsi kokwera mtengo.

Musanayambe kuganizira za ma cable, ndikofunikira kumvetsetsa kusiyana kwakukulu uku:

Gome 1: RS485 vs CAT6 — Magawo Ofunika

Impedance ya khalidwe ndiye chizindikiro chofunikira kwambiri chamagetsi chomwe chimasiyanitsa zingwe za RS485 ndi CAT6.

RS485 imafuna 120Ω ± 10% chingwe. Izi zikugwirizana ndi Zotsutsa zomaliza za 120Ω imayikidwa kumapeto onse a basi. Pamene chingwe choletsa kuyenda chikugwirizana ndi kutha kwa basi, chizindikiro cha kuyenda popanda kuwunikira.

CAT6 imafuna 100Ω ± 15% chingwe. Izi zikugwirizana ndi ma transceivers a Ethernet omwe amapangidwira makina a 100Ω.

Gome 2: Zotsatira Zosagwirizana ndi Impedance

Zoona Zauinjiniya: Chingwe cha CAT6 chingalumikizidwe ndi chipangizo cha RS485 pogwiritsa ntchito ma adapter, koma Kusagwirizana kwa impedance ya 20Ω Zingayambitse zizindikiro zomwe zimawononga deta, makamaka patali kapena pamlingo wokwera wa baud. Ichi ndichifukwa chake makhazikitsidwe akuluakulu amafakitale nthawi zonse amafotokozera chingwe choyenera cha 120Ω RS485.

Kusiyana kwakukulu kwa mtunda mwina ndiko kusiyana kwakukulu pakati pa mitundu iyi ya zingwe.

Gome 3: Kuyerekeza Mtunda ndi Deta

Chifukwa chake RS485 imapita patsogolo: Ntchito za RS485 chizindikiro chosiyana ndi kuchuluka kochepa kwa deta (nthawi zambiri 9.6-115.2 kbps ya Modbus RTU). Kachulukidwe kochepa kamalola chizindikiro kuyenda mtunda wautali kwambiri asanayambe kufooka.

Chifukwa chake CAT6 ndi yaifupi: CAT6 imagwira ntchito pa ma frequency kuyambira 1 MHz mpaka 250 MHz (kwa 1 Gbps). Ma frequency apamwamba amachepa mofulumira kwambiri patali, zomwe zimapangitsa kuti kuthamanga koyenera kufikire mamita 100.

Tanthauzo Lothandiza: Pa chipinda cha fakitale chokhala ndi mamita 500 chokhala ndi masensa ogawidwa pamalo onse, RS485 ndiyo njira yokhayo yothandiza pogwiritsa ntchito zingwe zamkuwa. CAT6 ingafunike ma fiber optic converters kapena ma repeater aliwonse mamita 100, zomwe zikuwonjezera mtengo ndi zovuta kwambiri.

Malo a mafakitale ndi ovuta kwambiri pamagetsi. Ma VFD, ma mota, ndi zingwe zamagetsi zimapanga ma EMI omwe amatha kuwononga zizindikiro zolumikizirana. Zofunikira pa chitetezo zikuwonetsa kusiyana kumeneku.

Gome 4: Kuyerekeza kwa Zotetezera pa Ntchito Zamakampani

Pa Dingzun Cable, Zingwe zathu za RS485 zili ndi mawonekedwe ake. chitetezo chophatikizana — Chophimba cha aluminiyamu 100% komanso choluka cha mkuwa chopangidwa ndi chitini chokhala ndi Kuphimba ≥85% — kupereka mphamvu yoteteza >90 dB kuti ilumikizane bwino ngakhale pafupi ndi ma VFD ndi ma mota akuluakulu.

Kuchuluka kwa mphamvu pakati pa ma conductor ndi chinthu chofunikira chomwe chimakhudza mwachindunji kutalika kwa chingwe ndi mtundu wa chizindikiro.

Gome 5: Kuyerekeza kwa Mphamvu

Sayansi: Mphamvu yamagetsi imagwira ntchito ngati fyuluta yotsika. Mphamvu yamagetsi yapamwamba imachepetsa zigawo za chizindikiro zomwe zimakhala ndi ma frequency apamwamba, ndikuzungulira m'mbali zakuthwa ndikuyambitsa zolakwika zazing'ono pa mtunda wautali. Ichi ndichifukwa chake zingwe za RS485 zimagwiritsa ntchito kutchinjiriza kwa polyethylene (PE) (εᵣ = 2.3) m'malo mwa PVC (εᵣ = 3.5-4.5).

Gome 6: Matrix Yoyenera Kugwiritsa Ntchito

Mwaukadaulo: Inde, koma ndi zoletsa zazikulu.

Chingwe cha CAT6 chimatha kunyamula zizindikiro za RS485. Zonsezi zimagwiritsa ntchito mawiri opindika. Zonsezi zitha kutetezedwa. Komabe:

Mavuto:

Chigamulo: CAT6 ingagwire ntchito pa RS485 nthawi imodzi mtunda waufupi (Koma pakulankhulana kodalirika kwa mafakitale, makamaka pa mtunda wautali kapena m'malo aphokoso lamagetsi, nthawi zonse tchulani chingwe choyenera cha 120Ω RS485.

Pa Dingzun Cable, Timapanga mawaya a RS485 makamaka pa ntchito zovuta izi — ndi impedance yoyenera ya 120Ω, kutchinjiriza kwa PE kochepa, komanso chitetezo cholimba cha composite.

Mukasankha chingwe cha RS485 cha polojekiti yanu, gwiritsani ntchito mndandanda uwu:

Tebulo 7: Zofunikira pa Kufotokozera kwa Chingwe cha RS485

Mphamvu Zathu za Chingwe cha RS485:

Kudzipereka Kwathu Kwaukadaulo pa Chipambano Chanu:

• Gulu la akatswiri aukadaulo pa kapangidwe ka netiweki ya RS485 yokhudzana ndi mapulogalamu
• Kulankhulana mwachindunji komanso mwaukadaulo kuyambira pa zofunikira mpaka kutumiza
• Kusintha kwakukulu — chiwerengero cha awiriawiri, choyezera cha kondakitala, mtundu wa zotchingira, zinthu za jekete, kusindikiza mwamakonda
• Zolemba zonse kuphatikizapo malipoti a mayeso, satifiketi, ndi kutsata

Chifukwa chiyani mainjiniya amasankha Dingzun Cable ya RS485:

Mukufuna kulumikizana kodalirika kwa RS485 pa netiweki yanu yamafakitale?
[Lumikizanani ndi gulu lathu laukadaulo lero kuti mukambirane kapena pemphani chitsanzo chapadera]