Industrial switches are used in industrial environments due to their good communication performance and super strong anti-magnetic and anti-interference performance. We all know that the industrial environment is very harsh, coupled with the continuous uninterrupted work of industrial switches, it is easy to cause overheating of industrial switches! Therefore, in addition to the wide temperature range components used in the product itself, we must pay more attention to the heat dissipation design of the switch! Next, the editor of Feichang Technology will give you a detailed introduction to how to solve the overheating phenomenon of industrial Ethernet switches, let's take a look!
1. Industrial Switch Heat Dissipation-Design of Cooling Fan The fan of the
commercial switch is always working at full speed. This will not only cause waste of power and increase the noise of the whole machine, but also increase unnecessary power supply heating and excessive dust in the chassis. More accumulation, more importantly, when the fan is at full speed, its lifespan is about 20,000 hours, which is 2.28 years. After 20,000 hours, the fan speed will gradually decrease, which will bring instability to the whole machine. Because there is no monitoring unit, this kind of hidden danger is difficult to find: For example, when the packet loss rate of the switch gradually rises, it is not easy to find that the temperature of key components in the chassis rises due to the aging speed of the fan and the excessive dust accumulation.
Industrial switches should use high-speed fans with intelligent monitoring circuits to monitor and control the operating conditions of network switches in real time, such as monitoring the temperature of the chassis fan, the temperature of the main switching chip, the temperature of the chassis, the temperature of the optical transceiver, etc. This is what we call "Smart fan".
During the working process of the industrial switch, the intelligent monitoring circuit will automatically adjust the fan speed according to the temperature of the component under test or the fan speed signal to dissipate heat for the network switch. The speed of the fan is mainly related to the load of the switch and the ambient temperature. When the ambient temperature is constant, when the data load of the industrial switch is reduced, the power consumption is reduced, and the fan speed is automatically reduced. When the data load of the industrial switch is heavier, the power consumption is increased, and the fan speed is automatically increased. In the case of a certain data load, when the industrial switch is in a low temperature environment, the fan speed will automatically decrease, and when it is in a high temperature environment, the fan speed will automatically increase. In the case of high temperature and high load, the fan can be in the emergency high speed (HighSPD) state, which can ensure the safe operation of the network than the full speed (FullSPD) state.
2. Industrial Switch Heat Dissipation-Intelligent Fan Controller Operation Features The
use of intelligent fan control technology can extend the life of the fan, reduce dust accumulation in the machine, reduce fan noise, save power usage, and ensure the effective operation of the system. In addition, the controller can not only provide alarms for fan failures and stoppages, temperature exceeding the warning line, but also for early hidden dangers due to aging or abnormal increase in air duct resistance, speed lower than normal, or abnormal temperature rise at the monitoring point. Voice prompts in Chinese and English are convenient for network administrators to eliminate the accident in its infancy.
In summary, due to the particularity of the environment in which the industrial switch is located and the particularity of its use (cannot be stopped), the countermeasures used in dealing with high and low temperatures, mainly high temperature environments, are quite different from ordinary switches.
A. For lower power conditions, generally when P≤10W, try not to use a fan for heat dissipation, and use natural heat dissipation. If natural convection is used, or increase the shell area, shell folds, or use profiles with better heat conduction, such as aluminum, etc. .
B. For high power conditions, when P≥15W, especially when there are multiple optical ports, or even multiple single-mode optical ports, when the problem cannot be solved by natural heat dissipation, active heat dissipation should be used to solve the heat problem. The active cooling method currently mainly refers to the installation of fans, but due to the particularity of industrial switches that cannot be shut down and require long-term operation, the use of fans should be considered as follows.
1. The fan is different from the fan of ordinary electronic equipment. It should be smart. Smart fans are qualitatively different from ordinary fans in terms of service life and functions.
2. The smart fan should be designed to be hot-swappable, that is, when the system is not shut down, if the smart fan system alarms (working life expires, etc.), the fan can be replaced online. By adopting the above thermal design and heat dissipation measures, the MTBF of network equipment can be greatly improved, and its life span can be prolonged, thereby avoiding the rule, and making the industrial switch work in a "stable and comfortable" temperature environment for a long time, such as the "10°C rule" It doesn't work, so it ensures the stability and reliability of the communication system in the automation process.
Well, the above content is the introduction of Feichang Technology about the overheating phenomenon of industrial Ethernet switches. I hope it can be helpful to everyone! Feichang Technology has long been committed to providing customers with optical transceivers, industrial-grade optical fiber transceivers, industrial Ethernet switches, protocol converters, serial servers and other industrial network communication products. It has become a leading brand in the domestic industrial communication field. Welcome to come to understand and exchange .