GTO GP-SW050 - Manual (Page 6)

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Important Safety Instructions
ImPORtant Safety InStRUctIOnS Specific to Secondary
Means of Protection Against Entrapment
As specified by Underwriters Laboratories Inc. UL 325 (30A.1.1), automatic gate operators shall have provisions
for, or be supplied with, at least one independent primary and one independent secondary means to protect
against entrapment. GTO gate operators utilize Type A, an inherent entrapment sensing system, as the primary
type of entrapment protection. The GP-SW050 operators have provisions for the connection of Type B1, B2, or
D protection to be used as the secondary type of entrapment protection.
1. For gate operators utilizing a non-contact 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 (Type B2) in accordance with UL 325 (51.8.4 [i]):
A. One or more contact sensors shall be located at the leading edge, trailing edge, and post mounted 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.
3. For gate operators utilizing an actuating device requiring continuous pressure to maintain opening or
closing motion of the gate (Type D) in accordance with UL 325 (51.8.4 [e]):
A. The gate operator controls must be placed so that the user has full view of the gate area when the gate
is moving.
B. Warning signs (see page 6) shall be placed adjacent to the controls.
C. No other activation device shall be connected.
ENTRAPMENT ALARM (UL 325; 30A.1.1A)
The GP-SW050 operators are designed to stop and reverse for 2 seconds when the gate comes in contact
with an obstruction or when an object activates the non-contact sensors. Additionally, these operators
are equipped with an audio entrapment alarm which will function 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 (e.g., transmitter signal) and the gate returns to a fully open or fully closed position.