OK ok ok
normally scanners just come as scanners no DMX. the input on all scanners is three wires, X, Y and ground.
so when you get a DAC you connect the Y from the dac to the Y on the scanner. the X from the DAC to the X on the scanner and same with the ground.
now the DAC will control the scanners, thats all you need to do.
next lasers.
most DAC's do RGB, so you connect your module to power as normal and connect the TTL + on the laser to the + on the DAC and same with - (ground)
just make sure you connect the red laser to the red laser output on the DAc, same with green and blue.
now the dac controls the blanking on the lasers.
thats its very very simple.