S52E Contactor question

[Wolfraider]

I have a Miller S52E feeder and a Hobart Champion Elite 225. The Hobart has no feeder hookups. I had an idea of using the 115v on the Hobart to power the S52E and purchasing a 225A relay and installing it in series between the Hobart DC positive connection and the S52E. Would this work for the contactor setup?

[Diode]

The Hobart Champion Elite 225 is not a CV power source. You would not want to MIG weld with it.