Erica Fusion modules have insignificant (max 15mA) power consumption from eurorack power supply unit(PSU), but they require separate, easy to install 6VAC PSU for tube heaters. Erica Fusion 6VAC PSU is designed to power up to 7 Erica Fusion modules.
NB! THIS TUBE HEATER PSU IS DESIGNED TO WORK WITH ERICA SYNTHS OR DOEPFER LINEAR PSUs or any other PSUs that have 220V INSIDE your modular case! Makenoise PSUs and other PSUs that lead DC into the case, will not work.