描述

常見的小區(qū)門禁卡原理是:

里面有一個稱之為RFID的芯片，當(dāng)拿著含有RFID芯片的卡片通過卡片閱讀機(jī)時，卡片閱讀機(jī)所發(fā)射出來的電磁波就會開始讀取卡片里面的信息，這里面的信息不但可以讀出，而且還可以寫入，修改，因此芯片卡不但只是個鑰匙它更是張電子身份證。只要在芯片中寫入個人數(shù)據(jù)，在卡片閱讀機(jī)的地方就可以知道進(jìn)出的是誰了。

門禁卡基礎(chǔ)定義原智能門禁系統(tǒng)由主機(jī)、讀卡器和電鎖組成（聯(lián)網(wǎng)時中添電腦和通信轉(zhuǎn)換器），讀卡圓式屬非接觸讀卡方式，持卡者只有將卡在讀卡器鄰近（5-15厘米）快捷擺動一次，讀卡器才能感應(yīng)到有卡并將卡中的信息（卡號）引領(lǐng)到主機(jī)，主機(jī)先進(jìn)行檢討卡的非法性，而后決議是否進(jìn)行合門動作。全部進(jìn)程只要在有效的刷卡范疇內(nèi)均可實現(xiàn)門禁管理功能。讀卡器裝置于門邊墻內(nèi)，不影響其它工作。并通過通訊轉(zhuǎn)接器（RS485）與電腦進(jìn)行實時監(jiān)控（可由電腦指令啟/閉所有門，并可實時查看所有門的狀況）、數(shù)據(jù)解決、查問、報表輸入等。
歐美品牌停產(chǎn)的，常用的“PLC”備品備件

我司產(chǎn)品應(yīng)用于以下領(lǐng)域：

1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》

2,《智能平鋼化爐系統(tǒng)制造》

3,《PLC可編程輸送控制系統(tǒng)》

4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》

6,《化工廠藥液恒流量計算機(jī)控制系統(tǒng)》

7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動化控制系列

本特利，英維思，伍德沃德，福克斯波羅、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂，ACSO，力士樂等各大品牌的DCS系統(tǒng)配件，機(jī)器人系統(tǒng)配件，大型伺服系統(tǒng)備件。

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