External Mounted Modules

I'm being asked to mount modules external to the main enclosure, XC41's to be exact. So there will be an enclosure to mount the MD4 to but everything else will be mounting on the rock crushing machine. The power and ground for the modules will come from within the main panel and be fuse protected. The issue I'm having is trying to solve the ground and power that is supplied to the DIN's and DOUT's. Is there a way to cleanly create a ground line and power line to run along the machine and tie into for each necessary I/O? I was thinking of a isolated buss bar, or perhaps a two to one butt splice. Any ideas will help.