Data converters are devices and devices used to convert data and signals in one format to another. Available in cable types with connectors on both ends, small rectangular parallelepiped types, card types, etc. The number of ports varies depending on the product and the purpose of use, and 1 to about 32 ports is the most common. Data converters are used in a wide range of fields, such as industry, transportation, etc., and the main applications include quality checks for industrial equipment, control of fire alarm systems and traffic systems, the use of peripheral devices for monitoring systems, etc. Some products have a security mechanism to prevent unauthorized access, and some products have an automatic data detection control function, power supply check function, etc., so it is necessary to consider them based on their specifications and performance.