一、門禁施工注意事項一:
——用網絡線布電鎖鎖到控制器的線!
門(men)禁施工中從電鎖到(dao)控(kong)制器(qi)的一(yi)段線,看起來很平凡,如果不(bu)規范很容(rong)易引起不(bu)好找原因的故(gu)障現象,這個一(yi)定要引起重視!?
由于電(dian)(dian)(dian)鎖(suo)(suo)工作電(dian)(dian)(dian)流(liu)比較(jiao)大(da)(相對于門禁系統(tong)的(de)其他設(she)備例如(ru)控制器(qi)讀卡器(qi)),電(dian)(dian)(dian)鎖(suo)(suo)離控制器(qi)有(you)(you)一定的(de)距(ju)離,線上(shang)的(de)壓(ya)降(jiang)會(hui)比較(jiao)大(da)。如(ru)果壓(ya)降(jiang)太大(da),會(hui)使(shi)得電(dian)(dian)(dian)鎖(suo)(suo)有(you)(you)時(shi)帶得動(dong)(dong),有(you)(you)時(shi)帶不(bu)動(dong)(dong)。磁力鎖(suo)(suo)有(you)(you)時(shi)吸力不(bu)夠。表現為門開關不(bu)正常。甚至(zhi)會(hui)和控制器(qi)搶奪電(dian)(dian)(dian)流(liu)資(zi)源,使(shi)得控制器(qi)供電(dian)(dian)(dian)不(bu)足,出(chu)現重(zhong)啟甚至(zhi)死機情(qing)況。?
有些工(gong)程人員圖(tu)一時(shi)(shi)布(bu)線(xian)(xian)方便,或者采(cai)購方便,使用網絡(luo)線(xian)(xian)來布(bu)電(dian)鎖到(dao)控(kong)制器的電(dian)線(xian)(xian),是很(hen)容易(yi)引起故障的,雖然調試的時(shi)(shi)候好像沒有問(wen)題(ti),過(guo)一段時(shi)(shi)間,就會經常(chang)出現問(wen)題(ti)了(le)。?
從電(dian)(dian)鎖(suo)到控制器(qi)的(de)(de)(de)線(xian)(xian),如(ru)(ru)果線(xian)(xian)長(chang)小(xiao)于(yu)50米(mi),要求使(shi)用(yong)截面(mian)(mian)積1.0平方毫米(mi)的(de)(de)(de)兩(liang)芯電(dian)(dian)源線(xian)(xian),無需屏蔽,如(ru)(ru)果超過50米(mi)請布(bu)加(jia)倍布(bu)多一條(tiao)兩(liang)芯電(dian)(dian)源線(xian)(xian),并聯(lian)供電(dian)(dian)。如(ru)(ru)果線(xian)(xian)長(chang)大于(yu)100米(mi),建議將控制器(qi)挪(nuo)近(jin)門電(dian)(dian)鎖(suo)的(de)(de)(de)位置,以(yi)縮短布(bu)線(xian)(xian)距離(li)。網(wang)線(xian)(xian)的(de)(de)(de)截面(mian)(mian)積是0.2平方毫米(mi)的(de)(de)(de),比(bi)我們規(gui)范(fan)的(de)(de)(de)線(xian)(xian)材小(xiao)5倍,所以(yi)是絕對不行的(de)(de)(de),即使(shi)控制器(qi)到電(dian)(dian)鎖(suo)的(de)(de)(de)距離(li)很(hen)近(jin)。電(dian)(dian)鎖(suo)門磁信號(hao)線(xian)(xian),可(ke)以(yi)采用(yong)網(wang)線(xian)(xian)。有些人,將網(wang)線(xian)(xian)的(de)(de)(de)四股(gu)合一股(gu),給電(dian)(dian)鎖(suo)供電(dian)(dian),雖然理論上(shang)也接近(jin)規(gui)范(fan),但不建議您這(zhe)樣(yang)做。這(zhe)樣(yang)做會使(shi)得接線(xian)(xian)端子不穩等帶來其(qi)他(ta)隱患。?
二(er)、門禁(jin)施工(gong)注意(yi)事項二(er):
——電(dian)源負荷(he)過大負載!主(zhu)要表(biao)現為帶的電(dian)鎖過多!?
門禁系統(tong)的電(dian)力配置建議?
澳(ao)普公(gong)司(si)提供的(de)標準配(pei)(pei)置(zhi)電(dian)(dian)(dian)(dian)(dian)源是(shi)12V3A的(de)開關(guan)電(dian)(dian)(dian)(dian)(dian)源。他可以滿(man)足(布(bu)線(xian)規范的(de),線(xian)截面積(ji)夠粗前提下(xia))最多二(er)個門(men)(men)(2把電(dian)(dian)(dian)(dian)(dian)插鎖(suo)(suo)或磁力(li)(li)鎖(suo)(suo))電(dian)(dian)(dian)(dian)(dian)力(li)(li)供應。一把雙開門(men)(men)磁力(li)(li)鎖(suo)(suo)折算是(shi)兩把單開門(men)(men)磁力(li)(li)鎖(suo)(suo)的(de)功(gong)率。如果系統超過這個配(pei)(pei)置(zhi),例如:2把以上電(dian)(dian)(dian)(dian)(dian)插鎖(suo)(suo)或者(zhe)2把以上磁力(li)(li)鎖(suo)(suo)就(jiu)需要增加(jia)一臺(tai)電(dian)(dian)(dian)(dian)(dian)源和原來(lai)的(de)電(dian)(dian)(dian)(dian)(dian)源分配(pei)(pei)供電(dian)(dian)(dian)(dian)(dian)。備注:如果有(you)些(xie)電(dian)(dian)(dian)(dian)(dian)鎖(suo)(suo)功(gong)率偏(pian)大,電(dian)(dian)(dian)(dian)(dian)源對其(qi)負荷能力(li)(li)會更(geng)弱(ruo)一些(xie)。?
如果電力不(bu)夠,不(bu)一定(ding)在調試的時(shi)候就會表現出(chu)來,除非很不(bu)夠。表現為有時(shi)門(men)鎖得(de)上,有時(shi)鎖不(bu)上,甚(shen)至會和控(kong)制器搶電流,使得(de)控(kong)制器重(zhong)啟甚(shen)至死機。?
三、門禁施(shi)工(gong)注意(yi)事項(xiang)三:
——485線(xian)(xian)路不(bu)(bu)使用(yong)(yong)雙(shuang)絞線(xian)(xian),或者使用(yong)(yong)低檔的無源轉換器!485通訊(xun)線(xian)(xian)不(bu)(bu)能走星型連接(jie),必須走規范的手(shou)牽手(shou)的總線(xian)(xian)模式。?
如果485走線(xian)不規(gui)范或者超出(chu)通(tong)訊(xun)(xun)范圍,會出(chu)現通(tong)訊(xun)(xun)不上或者有時通(tong)訊(xun)(xun)上有時通(tong)訊(xun)(xun)不上的現象。?
485傳輸(shu)是差模傳輸(shu)模式(shi),只(zhi)有(you)(you)485+和485-互為雙(shuang)(shuang)絞,才能使(shi)得485傳輸(shu)模式(shi)受到的干擾最小,傳輸(shu)最遠,傳輸(shu)質量(liang)最好。有(you)(you)些工程(cheng)商不采用雙(shuang)(shuang)絞線(xian)(xian)會(hui)使(shi)得干擾很大,有(you)(you)些工程(cheng)商誤以為線(xian)(xian)粗一(yi)(yi)(yi)些傳輸(shu)質量(liang)會(hui)好,將雙(shuang)(shuang)絞線(xian)(xian)合成(cheng)(cheng)一(yi)(yi)(yi)股(gu),另外一(yi)(yi)(yi)臺(tai)雙(shuang)(shuang)絞線(xian)(xian)也合成(cheng)(cheng)一(yi)(yi)(yi)股(gu),這樣適(shi)得其反,反而大幅度降低(di)了通訊質量(liang)。?
市面上有一(yi)(yi)種沒有帶(dai)電(dian)源的(de)(de)(de)小(xiao)巧(qiao)的(de)(de)(de)轉(zhuan)(zhuan)換器,價格便宜。但抗干擾性能不(bu)好(hao),一(yi)(yi)般用(yong)于(yu)單機的(de)(de)(de)室(shi)內短距(ju)(ju)離(li)的(de)(de)(de)通訊,例如(ru)考(kao)(kao)勤機。不(bu)適合(he)門禁系(xi)統(tong)。雖然其號稱可以帶(dai)32臺(tai)設備,傳輸距(ju)(ju)離(li)達1000米,其實(shi)在(zai)實(shi)際應用(yong)中經常遠(yuan)遠(yuan)達不(bu)到指標。所以建(jian)議您多(duo)臺(tai)聯網系(xi)統(tong)中不(bu)要采用(yong)這種無源的(de)(de)(de)轉(zhuan)(zhuan)換器。除非在(zai)室(shi)內,通訊距(ju)(ju)離(li)小(xiao)于(yu)100米,負(fu)載數小(xiao)于(yu)2臺(tai),從(cong)成本(ben)角度上可以考(kao)(kao)慮一(yi)(yi)下采用(yong)。否則,強(qiang)烈建(jian)議您采用(yong)有源的(de)(de)(de)485轉(zhuan)(zhuan)換器,價格也(ye)不(bu)貴,穩定得多(duo)。負(fu)載控(kong)制器的(de)(de)(de)數量也(ye)很(hen)多(duo)。抗干擾,防雷擊(ji),防浪涌效果也(ye)很(hen)好(hao)。?
485布線禁止星(xing)型連接(jie),即不可(ke)從轉(zhuan)換器分別拉線到(dao)各個(ge)控(kong)制器,然(ran)后在轉(zhuan)換器上并聯。這(zhe)種(zhong)連接(jie)使得通訊質(zhi)量(liang)很差。一(yi)(yi)定要從轉(zhuan)換器出來,先到(dao)一(yi)(yi)臺(tai)控(kong)制器,然(ran)后再連到(dao)下一(yi)(yi)臺(tai)控(kong)制,一(yi)(yi)臺(tai)一(yi)(yi)臺(tai)連下去,象串螞(ma)蚱一(yi)(yi)樣(yang)串下去才行(xing)。?
不規范的485布線,即(ji)使以后(hou)用屏(ping)蔽接地終端電阻來改善(shan)都是無濟于事的。?