What exactly does a security guard do? What does weak current include?

Security is not only a public security business (police executive department), but also a social public and socio-economic undertaking. Their development and progress not only depend on the development and progress of science and technology, but also provide and create a good social environment for the progress and development of science and technology. Security mainly includes: monitoring system, infrared perimeter alarm system, home burglar alarm system, building intercom system, parking lot special management system, community card system,

Weak current generally refers to DC circuits or audio, video lines, network lines and telephone lines, and the DC voltage is generally within 32V. Telephone, computer, TV signal input (cable TV line), audio equipment (output line) and other electrical appliances in household appliances are all weak current electrical equipment.

The weak current system generally includes the following subsystems: building automation management subsystem (BAS), automatic fire alarm subsystem (FAS), security monitoring subsystem (CCTV), satellite receiving and cable TV subsystem (CATV), underground garage management subsystem (CPS), public broadcasting and emergency broadcasting subsystem (PAS), program-controlled switching subsystem (PABX) and structured integrated wiring system.