Panasonic KX-PS8000 Operating Instructions Manual page 48

Setup
48
4
If the scanner is the last device, set its terminator switch (#4) to
A
ON. Go to step 5.
4
If the scanner is not the last device, make sure the terminator
B
switch (#4) is set to OFF (default setting).
5
Connect the power cord to the scanner's AC inlet and to an AC
outlet.