10BASE-T1S and 4-20mA: Differences, advantages and disadvantages
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10BASE-T1S and 4-20mA: Differences, advantages and disadvantages

Posted Date: 2024-01-18

In modern industrial communications, 10BASE-T1S and 4-20mA are commonly used transmission technologies, but they each have unique application scenarios, advantages and disadvantages. This article will conduct a detailed comparison of these two technologies to help readers better understand the differences and connections between them.

1. Overview of 10BASE-T1S

10BASE-T1S is an Ethernet-based physical layer standard designed for industrial automation. It supports a data transmission rate of 10Mbps on a single twisted pair and is suitable for data transmission over long distances and complex electromagnetic environments. 10BASE-T1S has high-speed, two-way communication capabilities and can meet the needs of modern industry for real-time performance and data transmission volume.

2. Overview of 4-20mA

The 4-20mA current loop is an analog signal transmission standard and is widely used in the field of industrial automation. It represents different measurement values ​​or control signals by transmitting a 4-20mA current signal in the loop. The 4-20mA signal has the advantages of strong anti-interference ability, long transmission distance, easy calibration and maintenance, etc., so it is given priority in many industrial situations.

3. Differences and advantages

Transmission method: 10BASE-T1S is a digital communication method based on Ethernet, supporting high-speed, two-way data transmission; while 4-20mA is an analog signal transmission method, with a relatively slow transmission speed but high stability.

Transmission distance: 10BASE-T1S has certain advantages in long-distance transmission and can meet communication needs within a larger range; although 4-20mA can also achieve longer-distance transmission, it is usually limited by line resistance and power supply voltage.

Anti-interference ability: 10BASE-T1S adopts advanced coding and modulation technology and has strong anti-interference ability; while the 4-20mA signal itself has certain resistance to electromagnetic interference, but additional shielding may be required in complex electromagnetic environments measure.

Scalability and flexibility: As a type of Ethernet technology, 10BASE-T1S can be easily integrated with other network equipment and systems, and has high scalability and flexibility; while 4-20mA systems usually require dedicated transmission lines and interfaces equipment, scalability is relatively poor.

4. Disadvantages

Cost: 10BASE-T1S technology is relatively new, and the cost of related hardware equipment and network equipment may be high; while 4-20mA technology is quite mature, and equipment and maintenance costs are relatively low.

Compatibility: Since 10BASE-T1S is an emerging communication technology in recent years, there may be problems with compatibility with some old equipment; while 4-20mA, as a traditional analog signal transmission standard, has good compatibility with most industrial equipment.

Complexity: 10BASE-T1S involves relatively complex setup processes such as network configuration and IP address allocation, which requires higher professional skills from technicians; while the 4-20mA system is relatively simple, intuitive and easy to use.

To sum up, 10BASE-T1S and 4-20mA each have their own unique advantages and disadvantages. When choosing which technology to use, it needs to be comprehensively considered based on specific application scenarios, cost budgets, and technical requirements. In the future development of industrial communication technology, these two technologies will continue to play an important role and provide strong support for industrial automation and intelligence.


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