ADJUSTMENTS

OBSTRUCTION

Adjustable pot controls gate sensitivity to blockages by the

RIGHT (R69)

instantaneous rise in motor current. When the limit is exceeded, the

 

gate stops and reverses a programmed distance (a minimum of 2

 

inches).

OBSTRUCTION

Adjustable pot controls gate sensitivity to blockages by the

LEFT (R160)

instantaneous rise in motor current. When the limit is exceeded, the

 

gate stops and reverses a programmed distance (a minimum of 2

 

inches).

NOTE: LiftMaster gate operators have two obstruction sense adjustments (left and right) where other gate operators have only one. This allows greater flexibility of installation. For instance, you can install a gate on an incline and not worry about sacrificing downhill gate sensitivity.

INRUSH

Adjustable pot controls the delay in sensitivity to gate

(R203)

obstructions. This delay in sensitivity prevents the initial motor

 

inrush current from causing a obstruction fault. The weight of the

 

gate determines this setting.

 

 

CONNECTORS

 

LIMIT SWITCH (J4)

Connector for the left/right limit switch cable.

PWR INPUT (J1)

Connector for AC input power.

MOTOR POWER (J3)

Connector for the motor cable.

LOOP DETECTOR

Connector for the optional LiftMaster Outside Interrupt Loop

 

detector

(J15)

add-on board.

LOOP DETECTOR

Connector for the optional LiftMaster Inside Interrupt Loop detector

(J12)

add-on board.

LOOP DETECTOR

Connector for optional LiftMaster Shadow Loop detector add-on

(J13)

board.

LOOP DETECTOR

Connector for optional LiftMaster Exit Loop detector add-on board.

(J14)

 

OBSTRUCTION

Connector for factory-installed alarm.

ALARM

 

37 of 42

Doc 01-20099

Rev F