5
IMPORTANT SAFETY INSTRUCTIONS
ENTRAPMENT ALARM (UL 325; 30A.1.1A)
The GTO/PRO® 4000/4200 Automatic Gate Operators are 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 hardwired 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.
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 GTO/PRO® 4000/4200 utilizes Type A, an inherent (i.e., built-in) entrapment sensing
system as the primary type of entrapment protection. Also, the GTO/PRO® 4000/4200 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 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.
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
