What does TD TO mean in the weak current diagram?

TD is an information socket and TO is a dual-port telephone and information socket. Weak current generally refers to DC circuits or audio, video lines, network lines, and telephone lines. The AC voltage is generally within 36V.

Household appliances such as telephones, computers, TV signal inputs (cable TV lines), and audio equipment (output lines) are all weak current electrical equipment. The first category of weak electricity refers to low-voltage electric energy such as safety voltage level and control voltage stipulated by the state, which can be divided into AC and DC.

AC 36V or less, DC 24V or less, such as 24V DC control power supply, or emergency lighting backup power supply. The other type is information sources carrying voice, image, data and other information, such as telephone, television, and computer information.

Extended information:

Common weak current systems include: closed-circuit television monitoring systems, anti-theft alarm systems, access control systems, electronic patrol systems, parking lot management systems, and video intercom systems , home intelligent system and security system, background music system, LED display system, plasma splicing screen system, DLP large screen system,

Three-meter carbon copy system, building automatic control system, lightning protection and grounding system, Paging intercom and professional intercom systems, weak current pipeline systems, UPS uninterruptible power supply systems, computer room systems, integrated wiring systems, computer LAN systems, property management systems, multi-functional conference room systems, cable TV systems,

< p>Satellite TV systems, satellite communication systems, fire protection systems, telephone communication systems, hotel management systems, video on demand systems, etc.

Baidu Encyclopedia-Weak Current