LiftMaster LA400 Residential DC Linear Gate Operator - Manual (Page 29)

28
EARTH GROUND ROD INSTALLATION (OPTIONAL)
NOTE: For proper operation, do not connect the earth ground rod to the green
screw on the outlet plate.
Install earth ground rod within 3 feet (0.9 m) of the operator.
Disconnect and remove the green/yellow ground wire connected to the screw
terminal of the control board.
Attach earth ground rod wire to the screw terminal of the control board
marked
. Ensure the power wiring ground connection remains securely
connected to the green screw on the outlet plate.
FUSE
OPEN
Z1
FUSE
OPEN
R4
GATE 2
ACCESSORY POWER
MAGLOCK
ALARM
GATE 1
J4
D15 C2 MOV2
C2 R4
24 VAC/
SOLAR
INPUT
J4
Ground Screw
Control Box
12 Gauge Wire
Earth Ground
Installation (Optional)
3' (0.9 m)
8' (2.4 m)
WIRING
» EARTH GROUND ROD INSTALLATION (OPTIONAL) + CONNECT BATTERIES
1
2
3
POWER
C64 BATT 1 BATT 2
C2
U2
BATT 1
MOV2
24 VAC/
INPUT
J4
USE DEDICATED CIRCUIT
CONNECT BATTERIES
The batteries are the main source of power for the operator. The operator is a
battery run system. Both batteries are charged in circuit using the transformer
(provided). The 24 Vac input can accept a charging transformer (26 Vac, 29 VA or
36 Vdc, 40 VA).
Connect the plugs from the batteries to the connectors on the control board.
BATT 2
Connector
BATT 1
Connector
1
1