LiftMaster LA400DC LA400DC Owner's Manual - Page 33

ACCESSORY WIRING EXTERNAL CONTROL DEVICES EXIT (2 Terminals) This input is a soft open command (maintained switch does not override external safeties and does not reset alarm condition). Used for exit probe, telephone entry, external exit loop detector, or any device that would command the gate to open. • Opens a closing gate and holds open an open gate, if maintained, pauses Timer-to-Close at OPEN limit. SHADOW (2 Terminals) This input is used for external shadow loop detector when loop is positioned under the swing of the gate. • Holds open gate at open limit • Only active when the gate is at the OPEN limit, disregarded at all other times • Pauses Timer-to-Close at OPEN limit INTERRUPT (2 Terminals) This input is used for photoelectric sensors and external interrupt loop detector when loop is on the outside of the gate. • Holds open gate at open limit • Stops and reverses a closing gate to open limit • Pauses Timer-to-Close at OPEN limit, activates quick close and anti-tailgate features when enabled on the expansion board (control board) Exit Com Shadow Com Interrupt Com Interrupt Loop Shadow Loop Exit Loop VEHICLE DETECTION DEVICES The same accessory inputs used for vehicle detection devices are also used for entrapment protection devices (refer to step 9 of Installation). The vehicle detection devices may be monitored or non-monitored, but only ONE monitored device may be connected to each input, inclusive of entrapment protection devices. Multiple non-monitored devices can be wired to the same input. A monitored device sends a pulsed signal to the operator so the operator is aware of the device. If the operator does not receive the signal from the device indicating it is working properly, it will not run in that direction. CLOSE EYES/INTERRUPT (2 Terminals) The CLOSE EYES/INTERRUPT input is for photoelectric sensor vehicle detection for the close direction. When an obstruction is sensed during gate closing the gate will open to the full open position. This input will be disregarded during gate opening and resets the Timer-to-Close. CLOSE EDGE (2 Terminals) The CLOSE EDGE input is for edge sensor vehicle detection for the close direction. When an obstruction is sensed during gate closing the gate will reverse for 4 seconds then stop, disengaging the Timer-to-Close. This input will be disregarded during gate opening. OPEN EYES/EDGE (2 Terminals) The OPEN EYES/EDGE input is for photoelectric sensor or edge sensor vehicle detection for the open direction. When an obstruction is sensed during gate opening the gate will reverse for 4 seconds then stop. This input will be disregarded during gate closing. 31 Close Photoelectric Sensors Close Edge Open Photoelectric Sensors OR Open Edge