Mighty Mule FM702 - Manual (Page 9)

5
IMPORTANT SAFETY INSTRUCTIONS
Secondary Means of Protection Against
Entrapment
As specified by Gate Operator Safety Standard, UL 325 (30A.1.1), automatic gate openers shall have provisions for, or be
supplied with, at least one independent primary and one independent secondary means to protect against entrapment. The
Mighty Mule utilizes Type A, an inherent (i.e., built-in) entrapment sensing system as the primary type of entrapment
protection. Also, the Mighty Mule has provisions for the connection of Type B2 protection to be used as the secondary type
of entrapment protection, if desired.
1. For gate operators utilizing a contact sensor (e.g., safety edge sensor– Type B2) in accordance with UL 325 (51.8.4 [i]):
A. One or more contact sensors shall be located at the leading edge, bottom edge, and post edge, both inside and
outside of a vehicular swing gate system.
B. A hard wired contact sensor shall be located and its wiring arranged so that the communication between the
sensor and the gate opener is not subjected to mechanical damage.
C. A wireless contact sensor such as one that transmits radio frequency (RF) signals to the gate opener for
entrapment protection functions shall be located where the transmission of the signals are not obstructed or
impeded by building structures, natural landscaping or similar obstruction. A wireless contact sensor shall
function under the intended end-use conditions.
ENTRAPMENT ALARM (UL 325; 30A.1.1A)
The Mighty Mule Gate Opener ® is designed to stop and reverse approximately 2 seconds when the gate comes in
contact with an obstruction or when an object activates the non-contact sensors. Additionally, these openers 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 opener receives an intended signal (e.g., from a
transmitter) and the gate returns to a fully open or fully closed position.
Bottom Edge Contact Sensor
on both sides of the gate
Leading Edge Contact Sensor
on both sides of the gate
Post Edge Contact Sensor
on both sides of the gate
Post Edge Contact Sensor
on both sides of the gate
Vehicular Gate Vehicular Gate