Chamberlain LiftMaster PROFESSIONAL SL930 Owner's Manual page 14

Heavy duty commercial slide gate operator
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Electrical Continued...
BATTERY BACK-UP
BATTERY BACK-UP
equipped with battery run, only the Right/Left
Side switch and the Mode switch need to be
set. 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
17 for correctly setting the Right/Left switch
on the control board) The Mode switch can be
set in either the Mode 1 or Mode 2 position.
This choice between Mode1 or Mode 2
depends on how the installer or end user
would like the gate to behave when power is
lost.
operate when power is lost. When battery
power gets low, the gate will open and stay
open until power is restored. (Fail Secure)
when power is lost and remain open until
power is restored. (Fail Safe)
the factory equipped with battery run, field
installation of battery run is very simple. The
illustration at left shows additional wiring
required for battery run that is not part of the
standard wiring.
operator.
terminals 13 and 14 and insulate the ends of
the grey wires.
control board by attaching to the 14 screw
terminals on the left side of the control board.
to terminal 15 of the control board.
or 15 of the control board to the negative relay
coil terminal as shown.
board to the N.O. terminal of either relay 1 or
relay 2.
D of the charger board to terminal 18 of the
main control board.
terminal A to battery positive and a black wire
from terminal B to battery negative.
pg 14
If the gate operator is already factory
Mode 1: Gate will continue to
Mode 2: Gate will open immediately
If the gate operator did not come from
First turn power off to the gate
Disconnect the two grey wires from
Secure the charger board to the main
Connect a green wire from terminal 2
Attach a green wire from terminal 3
Attach terminal C of the charger
Attach an orange wire from terminal
Finally, attach a red wire from

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