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總線報警主機與分線報警器的區別

時間:2016-9-13【打印此頁】 【返回

總線報警主機與分線報警器的區別,我們可以分別從兩者的功能來比較:

    要了解485總線制的報警主機,我們必須先了解分線制的報警主機。分線制報警主機是前端探測設備開關信號直接接在主機防區上從而觸發報警主機報警,而這些開關信號必須通過兩條線纜連接報警主機的防區端口,每一個信號都需要兩條獨立的線纜連接,且線材隨著距離的要求要求會更高,也就是說,有多少個探測器(防區)就需要多少對線纜。

    而485總線制報警主機不同,它是把前端探測設備開關信號接在地址模塊(或叫報警模塊、防區擴展模塊)上,當某個防區的探測設備發現有人非法進入時,探測器發出報警信號,由地址模塊(或叫報警模塊、防區擴展模塊)通過數據總線傳送給報警主機,實時的將本防范區域的報警信號、警情類型顯示到報警主機鍵盤上,并觸發聲光報警,使操作人員能及時、準確地掌握警情,及時調動保安人員進行處理。這樣的話,就不需要一對探頭再拉一對信號線到主機了,只要接地址模塊就行了,地址模塊到主機的距離可以達到1200米,而一對信號總線最多可以接到248個地址模塊(或叫報警模塊、防區擴展模塊),地址模塊又可以接到8個防區,且對線材的要求不高,無論距離多遠,最低只需要0.5的雙絞線即可,當然,帶屏蔽線材的更好。所以,這樣的話,就大大節省了線材和人力等成本,施工非常方便,最主要的是,布線的距離大大延長,最遠通過中繼器延長可以做到12000米,如果通過光纖,距離會更遠。


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