XB2 Reset double button switch Red and green open

INDUSTRIAL QUALITY – Double head type push button model XB2-EW8465 used for controlling signal and interlocking purposes in circuits of AC voltage up to 660V/AC 50Hz and DC voltage below 400V. Includes a signal lamp suitable for electrical appliances circuit of AC voltage up to 380V/50Hz and DC voltage below 380V; ideal for using as indicating signals, warning signals, emergency signals, etc.

OTHER SPECS –There are two symbols “I” and “O” on the power switch of some large equipment. Do you know what these two symbols mean? “O” is power off, “I” is power on. You can think of “O” as the abbreviation of “off” or “output”, which means off and output, and “I” is the abbreviation of “input”, that is “Enter” means open.In order to ensure the stable operation of electrical equipment during World War II, it is necessary to unify the switches of electrical equipment in various fields such as the army, navy, air force and logistics, and the standard of the selector switch. In particular, the identification of switches needs to ensure that soldiers and maintenance workers in various countries can recognize and use them correctly after only a few minutes of training.An engineer thought that the problem could be solved by using the binary code that was commonly used internationally at that time. Because binary “1″ means on and “0″ means off. So, there will be “I” and “O” on the switch.In 1973, the International Electrotechnical Commission (IEC) officially suggested that “I” and “O” should be used as the symbols of the power on-off cycle in the technical specifications compiled. In my country, it is also clear that “I” means the circuit is closed (ie, open), and “O” means the circuit is disconnected (ie, closed).