Rev B
Doc 6001343 (01-20299)
19 of 40
PART 3
MODEL BG 3100-X1 OPTIONS
A. LIFTMASTER LOOP DETECTOR BOARDS
The model BG 3100-X1 has connectors for four LiftMaster-supplied loop detector add-on boards. These
boards interface with Interrupt and Exit loop sensors, which simply plug into the control board. The add-
on boards can be ordered pre-installed, or can be installed in existing model BG 3100-X1 units.
B. POWER FAIL OPERATION OPTION
The LiftMaster Power Fail operation Option may be ordered pre-installed on new units, or can be
purchased separately for installation in LiftMaster gate operator systems in the field. The Power Fail kit
includes a DC motor, bet, battery, battery support bracket assembly (includes breaker, 3 control relays,
rectifier and wire harness) and mounting hardware. Features of the Power Fail Option are as follows:
•
The Power Fail Operation system fully opens (Fail Safe) or closes (Fail Secure) the gate (User’s
choice) one minute after a power outage. The gate will remain open or closed until AC power is
restored.
•
When AC power is restored, the battery is charged up to its full potential, then is continuously trickle
charged. Recharging takes from one to five hours, depending on the weight of the gate and how far
it moved during the outage. The age of the battery also increases the battery charging time.
NOTE:
Battery capacity decreases over time, so the battery should be replaced every two to three
years.
•
The charging section and controls for the Power Fail Operation are located on the control board.
•
The motor sensing potentiometers (Right reverse, Left reverse and Inrush) on the Gate Operator
board may require readjustment if the Power Fail Operation option is installed in the field.
•
Gate speed may be slightly reduced with the Power Fail Operation option installed.
IMPORTANT NOTE
During a power outage, all Gate Operator safety features are
disabled and only the limit switches stop movement of the gate.
C. GATE OPERATOR ARM
•
The standard arm is 16 feet long and weighs 32 pounds. It is tapered to reduce weight and to
prevent warping, and has black and white striping to enhance visibility.
•
An optional 8 foot arm extension may be added for installations needing a longer gate arm.
