ACU-RITE DRO 100 Reference Manual page 16

DRO 100 Installation
Connecting the Encoders
Insert the connector from each encoder into the mating connector on the back of
the readout. Fasten it with a small screwdriver.
Encoder input 1 will be displayed in the readout's top display and input 2, if any,
in the bottom display.
Provide enough slack in the encoder cables to allow for full travel of all machine
axes. Check that machine movements will not pinch the cables. Use the cable tie-
down hardware kits supplied with the encoders to fasten the cables neatly to the
machine.
Connecting a Ground Wire
Connect a ground wire from the terminal on the back of the readout to the
machine. The machine should also be connected to a solid earth ground. If not, be
sure that the readout is.
11