LiftMaster SW420 SW420 GL BOARD Manual - Page 26

PROGRAM SETTINGS (DIP SWITCH S2) EDGE/PHOTO OPEN EDGE/PHOTO CLOSE This switch (S2-3) selects edge or photoelectric sensor for the gate opening protection input. Open Photo Eye (Pause): When the controller is configured for photo eyes, the input functions to pause the gate during the opening cycle. Once the input is cleared the gate continues to open. Open Edge: When the controller is configured for safety edges, the input functions to reverse the gate to the close limit when the edge is activated during the opening cycle. CLED OPED WARN MAG CLED OPED WARN MAG S2 ON ON 1 2 34 S2 ON ON 1 2 34 PH PH PH PH MASTER/SECOND SYSTEMS Dual Gate Communications The control board is capable of running the operator in a master or second mode depending on (S4) switch setting. Before initiating any command the master unit queries for the presence of a "second unit" for a time period of one second. If the master gets no response the operator will operate in a stand alone mode. NOTE: For single unit applications, a jumper must be placed between 11 and 12 of the field wiring terminal block. In this mode no further communications will take place during travel. If the master detects the presence of a second unit the master will continue to query the second unit during travel. The second unit will send a response to the master for every query. The second operator will stop if there is a period of one second or more of no communications. TRAFFIC This switch (S2-4) selects edge or photo sensor for the gate closing protection input. Close Photo Eye (Reverse): When the controller is configured for photo eyes, the input functions to reverse the gate to the open limit when activated during the close cycle. NOTE: Timer-to-Close will reset if enabled. Close Edge: When the controller is configured for safety edges, the input functions to reverse the gate to the open limit when activated during the close cycle. The entrapment is not cleared at the limit and the Timer-to-Close will be disabled. The Timer-to-Close may be enabled by activating the interrupt loop, soft open or hard open input. CLED OPED WARN MAG CLED OPED WARN MAG S2 ON ON 1 2 34 S2 ON ON 1 2 34 PH PH PH PH When two operators are connected in dual gate configuration accessories may be connected to either the master or second. NOTE: Do not run Master/Second communication wiring in the same conduit as the power and control wiring. The Second unit will require a normally close stop circuit for proper system operation. After Master/Second wiring has been completed and the S4 switch programmed, both units must have their power cycled to initiate proper Master/Second communication. The motor learn function must be completed in stand alone mode prior to Master/Second wiring. Master or Standalone Gate Setting Master Unit ON S4 Second Gate Setting Master Unit ON S4 Second Unit Second Unit STREET Hold Open Loop Terminal Block Terminal Block Shielded Cable (twisted pair) minimum 18 gauge Conduit Earth Ground Rod (One Side Only) SAMS Conduit Second Shadow Loop Safety Loop COMPLEX OR PARKING LOT 26