LiftMaster SW420 SW420 GL BOARD Manual - Page 5

SUGGESTED SAFETY PROTECTION DEVICE LOCATIONS SWING GATE SYSTEM Telephone Entry System STREET Interrupt (Safety) Loop Photo eye for close cycle DUAL SWING GATE SYSTEM Photo eye for open cycle Run twisted wire* from loop to operator Seal Loops* Shadow Loop Interrupt (Safety) Loop 4' (1.2 m) Typical 1-1/2" (37 mm) Loop Wire* Layer 1/4" (6 mm) or larger depending on loop wire size COMPLEX OR PARKING LOT STREET Interrupt (Safety) Loop Gate 1 Photo eye for open cycle Photo eye for close cycle Photo eye for open cycle Gate 2 Shadow Loop Interrupt (Safety) Loop Run twisted wire* from loop to operator Seal Loops* 1-1/2" (37 mm) Loop Wire* Layer 1/4" (6 mm) or larger depending on loop wire size 4' (1.2 m) Typical COMPLEX OR PARKING LOT * REFER TO LOOP MANUFACTURER'S INSTRUCTIONS FOR DETAILED INSTALLATION & LOOP WIRING INSTRUCTIONS. 5