I have recently purchased devices to wire the second floor of my house. I have a separate enclosure hosted on the second floor, with one M1DBH, one P212S, one M1XIN and a multitude of sensors and one keypad mounted on the second floor. The M1DBH is connected to the M1G via a CAT6 cable run that connects the RSâ€485 DATA BUS outputs of the M1G, to the +12V Data A Data B – connectors of the M1DBH. Now, I would desire that the P212S would power all devices connected to the M1DBH rather than the M1G. How do I achieve that? Do I simply connect the +12V and – terminals of the M1DBH to the P212S? Do I need to cut the Jumper JP2? I can see that ” _Jumper JP2 can be CUT to isolate the M1DBH from the M1 Data Bus Power. A separate +12V power source must then be connected to the “+” screw terminal_” What is the purpose of the Spare 1 and Spare 2 terminals of the M1DBH data bus?