36W 24VDC Power Supply
The Neptune FMM & DOS power supply is 24VDC, 36W and can be used with the FMM so that you can attach the powered accessories above like the PMUP or the Solenoid Valve. It also is compatible with the Neptune DOS Fluid Metering System. This power supply is for 110V USA-style outlets.
1x FMM 24VDC Power Supply
Thank you for reaching out to us. Yes, this is the power supply needed for the DOS. You may have ran 1link cables strait into the APEX and no power supply when you had it previously set up.
Please let me know if you need anything further and take care!