Mighty-mule MM-SL2000B User Manual download pdf (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

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

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