true by pass looper with xlr's

[harrisxr650]

hey guys happy new year
I'm in search for a true bypass pedal looper for using it with vocals and run in parallel a rack effect (lexicon mx200) to be able to use in real time onstage.
I need xlr input and output so i can plug mic and then send it to the mixer and normal 1/4 TRS for send/return as well as send/return pots for more control ( i guess thats not much difficult at all)
so far i'm a bit confused regarding wiring of the input/output xlr to the switch ( 3pdt?) and to the send/return jacks. Anyone can shed some light with a diagram or something?\
thanks

[PRR]

Microphone has to go to a preamp.

Then to your special effects.