Intelligent control switch function classification and technology classification

1) Smart Switch

Smart switch refers to the unit that uses the combination and programming of the control board and electronic components to realize the intelligent switch control of the circuit. The intelligent switch is a general term for an electronic wall switch and a home appliance smart switch, and is a wall switch having micro-computer chip control, various functions, and various uses. It evolved on the basis of electronic wall switches, and has expanded a variety of home appliance switch series. Along with the emergence of new household appliances, there will be more new home appliance switches in the future; it is applicable not only to ordinary lighting. Lamps also apply to different household appliances. It is a humanized and intelligent switch.

2) Types of Smart Switches

There are several types of smart switches used in the market. The following are classified from two perspectives:

(1) Functional Angle Classification

The switch is a revolutionary revolution of the original rocker-type mechanical switch. Since the invention of the light bulb in Edison in 1879, there has been a simple mechanical switch. After more than one hundred years, the contemporary wall switch has no fundamental change and no breakthrough. In terms of sexual development, mechanical switching is still used. Until 1992, electronic technology began to enter the field of wall switches. Since the vast majority of the wall switch wiring pattern is only a single fire wire access method, the zero wire is directly led to the load, and only the fire wire in the switch can not form a loop and cannot supply power normally, thus limiting the introduction and application of many electronic technologies. For more than ten years, the development of electronic technology in wall switches has been ramping up in the early stages of simple functions. There are always five types of touch delay switches, voice-activated delay switches, human-sensing delay switches, knob dimming switches, and knob-variable speed switches.

In recent years, the power supply technology for wall switch single-firing access has made a major breakthrough. At the same time, micro-computer microprocessor chips have been introduced into electronic wall switches, enabling electronic wall switches with various functions to appear. At the same time, the types of electronic wall switches have also been greatly enriched and developed, mainly including human body sensors, electronic dimmer switches, electronic speed switches, and electronic time switches.

Intelligent control switch function classification and technology classification

(2) Classification by technology

1) Power line carrier control. The use of power lines to transmit signals, switches need to set the encoder, will be interfered by power line clutter, so that the work is very unstable and often lead to the switch out of control. The price is high, there are many additional equipment (such as wave traps, filters, etc.). Advantages: Cheap, affordable for the general public.

2) Wireless RF control. RF signals are used to transmit signals. The switches are often interfered by radio waves, making them stable in frequency and easy to lose control. The operation is very cumbersome and the price is very high. Such switches need to add a neutral line to achieve multiple control and mutual control effects. Advantages: Cheap, affordable for the general public.

3) Bus control. Fieldbus transmission signals are used to connect the bus panels through the field bus to realize communication and control signal transmission. Its stability and anti-interference ability are relatively strong. The earliest bus adopts a centralized bus structure and all the wires are centralized in a central control. On the gateway or controller, the signal line is then divided from this location to the location of each switch. This results in poor cabling system security, even if the central controller is paralyzed, and affects the entire operation. Advantages of distributed fieldbus system: good security, not affecting the operation of other points due to a point of failure, stability and anti-interference ability, the signal is transmitted through a special signal line, to achieve mutual communication between switches and switches . Each position of the smart panel can achieve multi-point control, total control, group control, point-to-point control and other functions.

4) Single FireWire control. A kind of wireless communication similar to GSM technology, built-in transmitter and receiver module, single FireWire input, the wiring method is the same as the traditional switch, easy to install. Disadvantages: Network control switch operation cannot be achieved.

Ethernet POE Switch

International standards of POE Switch:
POE is also known as a local area network-based power supply system (POL, Power over LAN) or Active Ethernet (Active Ethernet), sometimes also referred to as Power over Ethernet for short. This is the use of existing standard Ethernet transmission cables to transmit data and data at the same time. The latest standard specification of electric power, and maintains compatibility with existing Ethernet systems and users. The IEEE 802.3af standard is a new standard based on the POE of the Ethernet power supply system. It adds related standards for direct power supply through the network cable on the basis of IEEE 802.3. It is an extension of the existing Ethernet standard and the first international standard for power distribution. standard.
IEEE began to develop the standard in 1999, and the earliest participating vendors were 3Com, Intel, PowerDsine, Nortel, Mitel and National Semiconductor. However, the shortcomings of this standard have been restricting the expansion of the market. Until June 2003, the IEEE approved the 802.3af standard, which clearly stipulates the power detection and control items in the remote system, and connects routers, switches, and hubs to IP phones, security systems, and wireless LANs through Ethernet cables. The method of power supply for points and other equipment is regulated. The development of IEEE 802.3af includes the efforts of many company experts, which also allows the standard to be tested in all aspects.
The IEEE 802.3at standard was formulated in 2005 and promulgated in 2009. The 802.3at standard output power can reach 30W, and the available power at the receiving end is 25.5W.
The IEEE 802.3 working group and various manufacturer alliances launched POH-POWER OVER HDBASET in the industry at the end of 2012.
Using the current 4-Pair four-pair technology plus, the bilateral power supply can reach 60-100W power, which can be achieved by using Category 5 or 6 cables. It is used in high-definition video promotion to supply power to 42" LED TVs. According to the new regulations in 2010, the power consumption of 42" LED TVs needs to be less than 70W.
The production of 4-Pair four pairs of wires in China is low, so the industry with a long-term perspective should have the technology to upgrade from POE+ to POH as soon as possible!

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