Nortek Security & Control Mighty Mule MM372W Installation Manual page 9

Important Safety Information
Mighty Mule gate operators utilize Dual Sense Technology
entrapment protection. Dual Sense Technology
into every Mighty Mule and provides redundant methods of
entrapment protection for open and close gate directions.
In addition to Dual Sense Technology, every Mighty Mule
gate controller has provisions for the connection of
additional obstruction detection devices such as sensing
edges and photo beams.
These devices may be located where there is an increased
risk of obstruction. Refer to the diagram below.
NOTE: Photo beams should
always be located on the
non-travel side of the gate.
Photo Beam
(recommended, not included)
Entrapment and Obstruction Protection
Mighty Mules's Dual Sense Technology
photo beams or sensing edges to help prevent damage to vehicle or other items that could be hit by a moving gate.
Entrapment Alarm
The Mighty Mule Automatic Gate Operator is designed to stop and reverse the gate when the gate comes in contact with an
obstruction. Additionally, these operators are equipped with an audio entrapment alarm which will activate if the unit obstructs twice
while opening or closing. This alarm will sound for a period of 5 minutes, or until the operator receives an intended signal from a
hard wired entry/exit source (e.g. push button control or keypad). Turning the power switch on the control box OFF and back ON will
also deactivate the alarm. Wireless controls such as transmitters and wireless keypads will not deactivate the alarm.
FOR THE INSTALLER AND END USER
is built
™
Control Box
Photo Beam
(recommended, not included)
Example of MM371W Installation
(Installations vary slightly on different types of gates)
Leading Edges
Gate Warning Sign
Vehicular Gate
Sensing Edges
(recommended, not included)
Example of MM372W Installation
(Installations vary slightly on different types of gates)
provides entrapment protection. Since all installations are different, you may need to add
™
One or more edge sensors may be located at the leading
™
edge, bottom edge, and post edge, both inside and outside
of a vehicular swing gate system.
Wiring to sensors must be located and arranged so the
wiring between the sensor and the gate operator is not
subjected to mechanical damage.
A wireless sensor such as one that transmits radio frequency
(RF) signals that promote safety shall be located where the
transmission of the signals is not obstructed or impeded by
building structures, natural landscaping or similar objects.
Leading Edge
Gate Warning Sign
Vehicular Gate
Sensing Edges
(recommended, not included)
Gate Warning Sign
of gates
Vehicular Gate
Sensing Edges
(recommended, not included)
of the gate
Photo Beam
(recommended, not included)
Control Box
Photo Beam
(recommended, not included)
MM371W / MM372W Installation Instructions
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