ASL INTERCOM V2000 Installation Manual page 11

4. Ensure all DIP switches on the mainframe
controller board are in the UP position.
The mainframe controller board is located
on the rear left-hand corner.
5.
Set the rear-panel EARTH LIFT switch to
the DOWN ( , ON) 'grounded' position.
Set the EARTH LIFT switch to the
UP ( , OFF) position to remove the mains
earth from the signal circuit if a +ve ground
battery system is used, or it is necessary to
avoid a ground loop problem.
Never disconnect the mains earth
from the plug to attempt to cure a
ground loop. In the event of a fault,
the equipment casing could
become live.
6. Remove all Surveillance Blanking Plates from the rear panel by undoing 2 x screws.
V2000 – Installation Guide
M3 (6 mm)
Pozidriv
pan head
screw
U-0623-0291.docx – Issue: 04 complete, approved
Page 11 of 40
Earth Lift switch down
(factory default)
All switches in
the UP position
SLOT 1