LiftMaster MAST Owners Manual - Page 19

ADDITIONAL FEATURES » SEQUENCE ACCESS MANAGEMENT SYSTEM (SAMS) WITH "MEMORY" SEQUENCE ACCESS MANAGEMENT SYSTEM (SAMS) WITH "MEMORY" SAMS WITH OTHER OPERATORS REQUIRES THE K1 RELAY OPTION (Order SAMS KIT) This feature allows a logical interface between the MEGA ARM barrier gate and a swing, slide, etc. gate operator (or MTC-31). All that is required is 4 wires between the MEGA ARM barrier gate and the other operator. It will be necessary to have one set of dedicated/isolated dry contacts - {C. and N.C.} COMMON and NORMALLY CLOSED be available at the other operator's OPEN LIMIT SWITCH. Most operators will require that this EXTRA limit switch be added to their open limit switch assembly. OPERATION A one second pulse from access control device to the MEGA ARM will energize its K1 relay sending an open signal to the other operator causing it to open. However, the MEGA ARM's barrier arm will not raise yet. When the other operator reaches its full open limit switch, this will open the COMMON and NORMALLY CLOSED contact on the EXTRA open limit switch. This will allow the original signal from your access control device (that was stored in memory) to now raise the barrier arm. As long as the other operator is in the full open position, any additional open pulse sent will in turn energize the MEGA ARM's K1 relay to send another open signal to the other operator as well as cause the arm to raise again if it has closed via a car crossing the MEGA ARM's close loop. WIRING: 1. Run 2 wires from the other operator's isolated common & normally closed contacts of its open limit switch to the MEGA ARM J5#8 and one of the commons J5, #9-12. 2. Run 2 wires from the MEGA ARM's K1 relay (common & normally open) to the other operators common and open input. (WARNING: Max of 30 VOLTS at .5 amps through relay). J5 #8 was the unused SHADOW LOOP input on the MEGA ARM. NOTE: A separate open device (24 hour timer, toggle switch) can be run to the other operator to control it without raising the gate arm. Tampering with the other operator's safety loops, safety edges and reverse sensors WILL NOT cause the arm to raise if one tripped. The arm will only raise if an intended open signal was sent to the MEGA ARM. NOTES: • For motorized teeth, vertical pivot or overhead operator, leave S1-6, S1-8 OFF (this will keep the K1 relay latched down until the arm reaches the down position. This will keep the other gate operator locked open or teeth locked down until the arm closes completely). • In this mode, if the arm senses an impact, the K1 relay will stay energized holding open (or teeth down) the other operator until the arm times out and closes. NOTE: Insert a jumper across the JP2 terminal to allow the SAMS feature to work with the multiple vehicle memory count selection, use the K1 relay to open the sequenced gate (S1-5 off, S2-6 on, jumper across JP2). This allows gate to store input counts via J5 #4 but not raise the arm until the sequenced slide or swing gate has fully opened. K1 Relay C NO Other Operator (Slide, Swing, Teeth, etc.) Open Input Access Device J5 #11 J5 #8 C Extra Open Limit Switch NC S1, #6 and #8 (ON) = K1 Relay PULSE only. S1, #6 and #8 (OFF) = K1 Relay LATCH only. 19