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We know that protective grounding and protective zero connection are both for the protection of personal safety and equipment safety, and they are set for the same purpose. In terms of these two security protections, the protection of human life is the most important. Since they are all for the prot...
How many network surveillance cameras can a switch drive ? How many Gigabit switches can be connected to 2 million network cameras? 24 network heads, is it okay to use a 24-port 100M switch? Let's do some simple analysis on this kind of problem! 1. Choose according to the co...
The distance of cable transmission has always been the most frequently asked question by people with weak currents. We deal with cables every day. Only by knowing the use of cables can we be handy in projects. In this issue, we will summarize the commonly used cable transmission distances. 1. N...
UPS is an uninterruptible power supply . It is usually one of the engineering subsystems of the weak electric machine room, which connects the battery with the host equipment, and is mainly used to provide stable and uninterrupted power supply to the equipment. When the mains input is normal, the UP...
Horticultural technology is a professional basic theory of biological science and horticultural science. It is widely used in agriculture, forestry, garden management, business and other fields and departments to engage in technology, design and promotion of modern technology with long-term developm...
First, let's look at their definitions Two-wire system: Two wires transmit power and transmit signals, that is, the load output by the sensor and the power supply are connected in series, and the power supply is introduced from the outside, and connected in series with the load to drive the load. Th...
On July 6, the 2023 World Artificial Intelligence Conference (WAIC) was held in Shanghai. During the conference, Hu Jianjun, vice president and chief network and information security officer of Siemens (China) Co., Ltd., was invited to participate in the smart trend forum themed "Smart Assistance Do...
On July 11, electronica China 2023 opened at the China National Convention Center (Shanghai). Qin Cheng, general manager of Siemens Xcelerator China, was invited to participate in Sifangwei's theme event of "Digital Wisdom Butterfly Transforms Sifang Promise" and delivered a speech . At present, wit...