Di day CCTV
Di day dung cach la yeu to thiet yeu cho he thong CCTV tin cay. Tim hieu cac phuong phap tot nhat cho cap dong truc, Ethernet va phan phoi nguon dien.
Cac loai cap
Cap dong truc (RG59, RG6)
Su dung trong he thong CCTV analog. Truyen tin hieu video tu camera den DVR. Chieu dai toi da khuyen nghi la 500 met. Hai day dan ben trong lop cach dien.
Cap xoan doi (Cat5e, Cat6, Cat6a)
Su dung cho camera IP/Ethernet. Truyen du lieu va dien (PoE). Cat5e cho 1Gbps, Cat6 cho 10Gbps, Cat6a cho 25Gbps. 4 cap day xoan.
Cap quang
Su dung cho truyen dan khoang cach xa va cach ly dien. Khong bi nhieu. Dat hon va can thiet bi dau noi chuyen dung.
Di day CCTV analog
He thong analog don gian: mot cap dong truc cho moi camera truyen video den DVR.
Huong dan lap dat:
- RG59: Tieu chuan cho duong ngan duoi 500m
- RG6: Chan nhieu tot hon, dung cho duong dai hon
- Dau noi: Dau BNC o ca hai dau
- Tiep dat: Tiep dat dung cach ngan nhieu video
Di day IP/mang
He thong IP yeu cau cap Ethernet tu camera den switch mang hoac NVR.
Huong dan lap dat:
- Toi thieu Cat5e: Ho tro Gigabit Ethernet
- Khuyen dung Cat6: San sang cho tuong lai, hieu suat tot hon
- Ho tro PoE: Power over Ethernet loai bo cap nguon rieng
- Chieu dai toi da: 100 met theo tieu chuan
Phan phoi nguon dien
Camera can nguon dien. He thong analog can cap nguon rieng. He thong IP co the dung Power over Ethernet (PoE).
Nguon analog
Bo nguon trung tam 12V hoac 24V voi tu phan phoi. Day nguon rieng tu bo cap nguon den moi camera. Can them khong gian trong mang cap.
PoE (Power over Ethernet)
Camera IP nhan nguon tu cap Ethernet qua bo tiem PoE hoac switch PoE. Mot cap phuc vu ca du lieu va nguon dien. Lap dat gon gang hon.
Bo luu dien UPS
Su dung UPS cho DVR/NVR va switch mang. Dam bao ghi hinh tiep tuc khi mat dien.
Phuong phap di day tot nhat
Phuong phap lap dat:
- Khong tron nguon va video: Di trong mang cap rieng biet
- Danh dau dung cach: Danh dau tat ca cap o hai dau de de chan doan
- Du thua cap: De lai 10% cap du o cac diem noi cho dieu chinh tuong lai
- Di day an toan: Su dung mang cap va kep de tranh hu hong
- Tranh uon gay: Ban kinh uon toi thieu de tranh mat tin hieu