Battery Backup - Chamberlain LiftMaster SL930 User Manual

BATTERY BACKUP

If the operator is already factory equipped with a battery backup,
only the Right/Left Side switch and Mode 1 are supported (Figure
3). The Right/Left switch simply needs to be set in the same
position as the Right/Left switch on the main control board (see
page 22). Gate will continue to operate when power is lost.
INSTALLATION
1. Disconnect power to operator.
2. Disconnect the brown and red wires from terminals 13 and 14
and insulate the ends of the wires.
3. Attach 14 terminal charger board to terminal screws on the left
side of control board and secure using terminal screws.
4. Connect green wire from terminal 2 to terminal 15 of the
control board.
5. Connect orange wire from terminal D of the charger board to
terminal 18 of the main control board.
6. Connect red wire from terminal A to battery positive (+) and
black wire from terminal B to battery negative (-) (Figure 4).
W I R I N G
Figure 3
(Set same as RIGHT/LEFT
switch on control board.)
Figure 4
Disconnect these
existing wires
from 13 and 14.
14
Existing
Bridge
Rectifier