You only use the color profile converter if you are using color management. It works with simulate output(given that you want to use a calibrated monitor and work perfectly with Photoshop). Either both are used, or neither.
All dpx are 10 bit log. They only temporarily go to linear so you can color correct. Everything else that is is not initially a log, needs to be converted to log also.
If you want furthur reading, I highly recommend that you delve into Adobe’s white paper on color management.
https://technicolorsoftware.hostzi.com/