Why is the power supply of industrial control system mostly DC24V? Why not 17V? 11V?
This is the industrial standard, just like other industrial standard parts. This is related to the actual battery 1.5V, the lead-acid battery is also 3V, an interval related, 24V just have a combination. 11V, 17V, if you use batteries, how many batteries do you use? Suspended in midair。No standard power supply, accessories to go there to find ah? Can not a product, a power it?
At the same time can reduce the current power, and is a common multiple of the majority of the 24, the standard of course should be considered and a variety of battery, either 2V or lead-acid batteries commonly used 1.2V, 1.5V and 3V batteries are good combination. With a series of standards, it's good to swap everything at the critical moment.
This is a good option in the power series of standards, standards and made this but after a long time of practice summed up, it will consider a number of factors, the first is a safety voltage on the human body, not all produce the risk of electric shock, second can be regarded as a relatively high safe voltage,
