What is the maximum transmission distance of a network cable?

乱世煮酒论天下

What is the maximum transmission distance of a network cable? [Copy link]

 

The inverter keyboard is operated with a network cable. What is the maximum distance supported by the network cable in this case? It should be 422 communication protocol?

Furthermore, for communications using network cables as the physical transmission medium, what other factors are related to the transmission distance?

qwqwqw2088

You should use a shielded network cable.

qwqwqw2088

Network cables are divided into Category 5 and Category 6 cables. At a transmission rate of 100Mb/s, the maximum transmission distance is about 100 meters.

The Ethernet protocol should have provisions for the maximum distance for data transmission using unshielded twisted pair cables.

qwqwqw2088

Temperature and humidity will definitely affect

Also, why do network cables have to be twisted in pairs?
It is to offset the impact of electromagnetic waves and reduce crosstalk.

So crosstalk and delay are also factors

吾妻思萌

It mainly depends on your requirements for signal quality and network cable attenuation. Generally, it won't work if it's about 100 meters.

乱世煮酒论天下

qwqwqw2088 posted on 2024-6-6 21:26 Network cables are divided into five categories and six categories. At a transmission rate of 100Mb/s, the maximum transmission distance is about 100 meters. The Ethernet protocol should have regulations, using unshielded double...

I have another question. The home network cables we use now were originally modified telephone cables. How are the signals transmitted into the home network and what is the distance?

The current network is transmitted using optical fiber, which is then converted into electrical signals using optical modems and routers. The distance of transmission using network cables is relatively short.

hellokitty_bean

There are specifications, right? When I was taking a network course, there was a very specific description of 50 ohm and 75 ohm coaxial cables, 100-150 meters.

Category 5 and Category 6 twisted pair cables seem to have a 100-meter limit, otherwise there will be signal attenuation, right?

This knowledge is not that accurate yet.

乱世煮酒论天下

qwqwqw2088 posted on 2024-6-6 21:16 The network cable you use should be shielded.

Category 6A with shielding and straight frame

乱世煮酒论天下

hellokitty_bean posted on 2024-6-7 10:56 There are specifications. . . . When I was taking the network course, there were very specific descriptions of coaxial cables 50 ohms and 75 ohms, 100-150 meters of category 5 and 6...

Is it specifically the online course?

qwqwqw2088

乱世煮酒论天下published on 2024-6-7 09:18 There is another question. The home network cables we use now were originally modified from telephone lines. How are the signals transmitted into the home network? This distance...

I don't know if you have ever used it. The earliest home Internet access was through telephone lines, which was called ADSL at that time.

ADSL technology allows data to be transmitted over existing telephone lines without interfering with telephone services. Theoretically, the transmission distance of ADSL can reach about 5 kilometers, but in practice it is not possible.

qwqwqw2088

When transmitting electrical signals, network cables, such as Category 5, Category 5e, and Category 6, generally can guarantee good signal quality within 100 meters. In the integrated wiring specification, it is also clearly required that horizontal wiring should not exceed 90 meters and the total link length should not exceed 100 meters.

100 meters of network cable transmission is the limit.

qwqwqw2088

Talking about the world in a chaotic world published on 2024-6-7 14:45 Category 6A with shielding and one-line frame

乱世煮酒论天下

qwqwqw2088 posted on 2024-6-7 15:32

The shielding layer is connected to the metal shell of the crystal head

beyond_笑谈

Although the panel (keypad) on the inverter is connected by a crystal head and a network cable, it is not Ethernet, but RS485 signal. Traditional inverters mainly use RS485, and RS422 is not used much.

eew_5c9pVM

乱世煮酒论天下published on 2024-6-7 09:18 There is another question. The home network cables we use now were originally modified from telephone lines. How are the signals transmitted into the home network? This distance...

Home network cables seem to be dozens of meters long, but this is at the expense of the transmission rate. A 100M broadband must be cut into at least 1/8 of the actual speed to reach the terminal device.

好好xuexi

Network cables are divided into Category 5 and Category 6 cables. At a transmission rate of 100Mb/s, the maximum transmission distance is about 100 meters.

The Ethernet protocol should have provisions for the maximum distance for data transmission using unshielded twisted pair cables.