The controller requires a power supply between 12V and 24V either AC or DC. Whatever power is applied will appear at the outputs (when they are ON).
The default power adapter included with this controller is compatible with the solenoid valves or pumps supplied.
Note that the outputs are limited to a current of 1.2A inductive load and 3A resistive load. The power supply should be sized according to the maximum load that can be applied at any one time.
The maximum total draw at any one time should not exceed 4A. Normally we supply a 24V DC power supply.