Alternativelly you can put the bed on a separate circuit with a switch like a electromagnetic relay or a SSR. This way one psu supplies for everything, the other only for the bed, and they can be kept completely separated with no contact to each other. That means not even the grounds will be in contact of one another. Again, both circuits can be completelly isolated, all v+ and gnds can be kept separate, but for that you cant use a fet. Probably a SSR would be best, tho its kinda expensive.
↧