LiftMaster MAST Owners Manual - Page 14

FEATURES AND FUNCTIONS » S2 DIP SWITCHES S2 DIP SWITCHES S2 Dip Switch Block 1 1 J2 AUX LIMITS D8 D1Ø F G HI M/S G MULTIPLE VEHICLE MEMORY DIP Switch S2-6 With S2-6 DIP switch in the ON position, the Multiple Vehicle Memory will activate, with inputs on terminal 4 and Common (COM) on the J5 terminal J strip. Any of the terminals 9-12 on the J5 terminal strip can be used for common. R NOTE: With Multiple Vehicle Memory activated, the barrier arm will remain OPEN until the pre-authorized number of vehicles pass over the Close Loop. S1 S2 1 2345678 1 2345678 R1 R12 U4 F TIMER-TO-CLOSE DIP Switch S2-1 to S2-5 The S2-1 to S2-5 DIP switches will set the period of time the gate remains opened after reaching the OPEN position. Each DIP switch represents the number of seconds the gate will remain OPEN before CLOSING. With the S2-3 DIP switch in the ON (factory default) position, there are 4 seconds to allow a vehicle enough time to move out of the path of the closing barrier arm. Turning multiple switches ON will combine the amount of time the barrier arm remains OPEN. The maximum hold OPEN time is 32 seconds. To de-activate this feature turn S2-7 DIP switch to the OFF position. H AUTO CLOSE DIP Switch S2-7 The S2-7 DIP switch (Auto Close) should be activated in case one or more of the pre-authorized vehicles DO NOT pass through the gate. The barrier arm will close after the set amount of time elapses and the count memory is reset to zero. I FAIL SAFE (AUTO OPEN ON AC POWER FAILURE) DIP Switch S2-8 With S2-8 DIP switch in the ON position, the barrier arm will automatically OPEN approximately 15 seconds after a loss of power. Once the power has been restored the operator will resume normal operation after any input. With S2-8 DIP switch in the OFF position, the barrier arm will resume normal operation until the batteries drop below 50% at which time the barrier arm will OPEN and remain opened until the batteries are fully charged. 14