The M1DBHR must be as close as possible to the M1 within the same enclosure. You can then connect the M1DBH in parallel with the M1DBHR making sure to remove the JP3 jumper on the M1.
The M1DBHR must be as close as possible to the M1 within the same enclosure. You can then connect the M1DBH in parallel with the M1DBHR making sure to remove the JP3 jumper on the M1.