Bagaimana cara memilih pembaca kartu kontrol akses?

Pembaca kartu kontrol akses , umumnya disebut sebagai "pembaca kontrol akses" atau "pembaca". Sebagai bagian yang sangat penting dari sistem kontrol akses, kepentingannya tidak kalah pentingnya dengan pengontrol akses.

Pertama-tama, saya ingin memperkenalkan kepada Anda klasifikasi pembaca kartu:

Menurut mode komunikasi: mode komunikasi pembaca kartu terutama mengacu pada komunikasi antara pembaca kartu dan pengontrol. Secara umum dibagi menjadi dua jenis: Wiegand dan RS485.

Mari kita bicara tentang komunikasi Wiegand terlebih dahulu. Saat ini, sebagian besar jenis komunikasi kontrol akses adalah Wiegand (selanjutnya disebut WG). Komunikasi WG dibagi menjadi WG26, WG34, WG66, dll. Perbedaan antara keduanya terletak pada jumlah digit pada nomor kartu baca (WG66 lebih panjang dari WG34, dan WG34 lebih panjang dari WG26). Semakin lama nomor kartu dibaca, semakin berat nomor kartu yang dikirimkan. Semakin kecil kemungkinannya.

Dibandingkan dengan komunikasi WG, komunikasi RS485 memiliki jarak transmisi yang jauh (1200 meter), dan yang lainnya adalah dapat menggunakan lebih sedikit jalur untuk mengirimkan berbagai sinyal yang berbeda. Empat baris dapat mengirimkan nomor kartu, mengirimkan sinyal anti-gangguan, dan anti-rusak, dan dapat memberi umpan balik informasi dari pengontrol untuk mengontrol LED (lampu) dan BIP (buzzer), dll. Secara umum, ketika kepala pembacaan 485 dikerahkan pada kesempatan patroli online (dalam hal ini, hanya perlu membaca kartu dan tidak memerlukan aksesori seperti kunci kontrol), jarak komunikasinya sangat menguntungkan.

Pengingat khusus: Karena komunikasi RS485 memiliki protokol, umumnya disarankan agar pembaca dan pengontrol diproduksi oleh produsen yang sama saat memilih model. Jika mereka berasal dari pabrikan yang berbeda, masalah koneksi protokol 485 akan terlibat.

2. Menurut penampilan dan bahan: ukuran (besar, sedang, kecil), bahan (logam, plastik).

Ukuran pembaca kartu terutama ditentukan sesuai dengan kondisi pemasangan di tempat, terutama untuk pemasangan dinding kaca. Biasanya lokasi pemasangan pembaca kartu akan sangat sempit dalam hal ini, jadi perhatian khusus harus diberikan saat memilih jenisnya.

How to quickly provide a card reader that satisfies users for different decoration styles and different application occasions? In the pen, I know that the personalized access control card reader produced by Max is very popular with Party A during the promotion process. The card reader has a variety of sizes and appearances, and the material is also divided into two types: plastic and metal. For different projects and different applications, the patterns, colors, and crafts on the card reader can be customized quickly, which is enough to be called "using the idea of making a handicraft to make a card reader".

3: The reliability of the access control card reader is mainly reflected in the following aspects

a. Port protection: Because the installation of the card reader will involve wiring (power lines, signal lines, etc. at least 4~6, as many as ten), in the process of construction, it is inevitable to connect the wrong lines if the port is not protected, the card reader will be damaged, which will bring a lot of trouble to the engineering company, so when choosing a product, you must choose an access control card reader with port protection function. The specific identification method is in the case of 12V Carry out tests such as reverse connection, the wrong connection of power line, short circuit of power supply and signal line, etc. If the reverse connection and wrong connection can last for more than 30 minutes, and the card reader of the device is not damaged, then the quality is acceptable.

b. Wide voltage design (drive capability): mainly considering the voltage drop of the power supply when the card reader is wired for a relatively long distance. If there is no wide voltage design, it is very likely that in the actual project ( If the card reader is 100 meters away from the controller), the card reader cannot work normally. Generally speaking, the card reader can work normally at a voltage of 7~30V, and its voltage adaptation range is relatively complete. The test method is also very simple, just use the adjustable power supply to connect the power cord of the card reader to test. Or use a 100-meter network cable to connect the reading head and the access controller directly to see if it works normally.

c. Anti-interference: mainly refers to some occasions, the card reader must inevitably be installed on the surface of the metal object (iron door, stainless steel door), and there is another situation where the card is swiped in and out. The headers need to be installed "back to back". If it is a product with weak anti-interference, when it is installed on the surface of a metal object, the card reading distance will be significantly reduced, or even no card will be read. However, if the products installed "back to back" are not strong in anti-interference, it is very likely that the card reader will be sensed when the card is swiped when entering the door. This is very inconvenient to use. The judgment method for anti-interference is very simple, that is, when choosing a card reader, find an iron plate, stick the card reader on the iron plate, and see if the reading distance changes. It is recommended to choose the IC reader to test. (IC card reading distance is generally 3~5CM). The other is to connect two card readers, place the two card readers side by side at a distance of no more than 5cm, and then swipe the cards on the card readers to see if there is a "serial number".

Penulis: Ditulis oleh Anna Zhang dari S4A INDUSTRIAL CO., LIMITED