24V adapters are power supply units that convert alternating current (AC) from a wall outlet into direct current (DC) at 24 volts.
24V adapters typically have an AC input voltage range of 100-240V, allowing them to be used with different mains voltages worldwide. The output is a regulated 24V DC voltage, with varying current ratings (e.g., 0.5A, 1A, 2A, etc.) to match the power requirements of the connected device. They often have a barrel-type DC connector or terminal block for connecting the output to the device.