According to the British Standard for building service, extra low voltage (ELV) is defined as any system operating in an voltage not exceeding 50V ac (or 120V ripple free dc). ELV system is a wide range of services in the building that can be provided by us.
In terms of the functional approach, it can be categorized into 9 main sub-systems:
SMATV / CABD System (Satellite & TV receiving and broadcasting system)
Public Address System
Closed-circuit television (CCTV) Surveillance System
Security Burglar Alarm / Card Access Control System
Radio Paging and Walkie Talkie System
Home Automation System
Radio Frequency Identification System (RFID)
Biometrics Security System
Watchman Tour System
“At the end of the day, the goals are simple: safety and security.”