Mach2 and Campbell/soundlogic board

I have questions about configuring Mach2 to use Campbell/Soundlogic
board.

1/ Campbell/Soundlogic board manual have 2 positions for M1 and N1
operations. What are these operations and how to choose between
them ? I don't find words about them in my Mach2 Manual !


2/I use an home made relay PCB on J22. The first relay is to on/off
my porter cable router (spindle), and the second one is to on/off my
dust collector.
2a/ How Mach2 manage the on/off of my spindle ? What is the
G&M-code I have to use ?
2b/ How Mach2 manage the on/off of my dust collector ? What is
the G&M code I have to use ? Can I use the coolant G&M-code in my CAM
software ?


Thanks for your help