PLC (power supply unit) is a control device used as an alternative to relay circuits. They are widely used for applications such as controlling robots or other devices used at factories, and in elevators and automatic doors. Some products are equipped with a function for alerting users when replacement is required, preventing system failures due to power supply expiration. Available in a range of power supply varieties, from 10 W or less to more 45 W. Select according to the application and operating environment.