Mighty Mule MM-SL2000B - Manual (Page 9)

IMPORTANT SAFETY INSTRUCTIONS
SL-2000B Instruction Manual 04.26.12
vii
Secondary Means of Protection Against Entrapment
As specified by Gate Operator Safety Standard, UL 325 (30A.1.1), automatic gate operators shall have an inherent
entrapment sensing system, and shall have provisions for, or be supplied with, at least one independent secondary
means to protect against entrapment. The SL-2000B utilizes Type A, an inherent (i.e., built-in) entrapment sensing system
as the primary type of entrapment protection. Also, the SL-2000B has provisions for the connection of Type B1 or B2
protection to be used as the secondary type of entrapment protection, if desired.
1. For gate operators utilizing a non-contact sensor (e.g., photo-electric sensor– Type B1) in accordance with UL
325 (51.8.4 [h]):
A. Refer to the sensor manufacturer’s instructions on the placement of non-contact sensors for each type of
application.
B. Care shall be exercised to reduce the risk of nuisance tripping, such as when a vehicle trips the sensor while the
gate is still moving.
C. One or more non-contact sensors shall be located where the risk of entrapment or obstruction exists, such as the
perimeter reachable by a moving gate or barrier.
2. 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 slide 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 operator is not subjected to mechanical damage.
C. A wireless contact sensor such as one that transmits radio frequency (RF) signals to the gate operator 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.
You may want to consider adding photo beams to your installation. GTO Photo Beams [R4222] provide a “non contact”
means of entrapment protection.
ENTRAPMENT ALARM (UL 325; 30A.1.1A)
The SL-2000B Gate Operator is designed to stop and reverse within 2 seconds 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) and the gate
returns to a fully open or fully closed position. 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.
CAUTION AUTOMATIC GATE STAND CLEAR 1-800-543-GATE
®
Operator
Contact Sensor
Warning Sign
Contact Sensor
Contact Sensor
Roller Guard
Roller Guard
Pedestrian Gate
1. KEEP CLEAR! Gate may move at any time.
2. Do not allow children to operate gate or play in gate area.
3. This gate is for vehicles only. Pedestrians must use a separate entrance.
Moving Gate Can Cause Injury Or Death
WARNING !
Vehicle Gate