Class I – Residential vehicular gate operator
A vehicular gate operator (or system) intended for use in a home of one-to four single family
dwellings, or a garage or parking area associated therewith.
GATE OPERATOR ENTRAPMENT PROTECTION
33
The SL3000UL™ is intended for use in vehicular slide gate applications:
Class II – Commercial/General access vehicular gate operator
A vehicular gate operator (or system) intended for use in a commercial location or building such as a
multi-family housing unit (five or more single family units) hotel, garage, retail store or other building
servicing the general public.
Class III – Industrial/limited access vehicular gate operator
A vehicular gate operator (or system) intended for use in a industrial location or building such as a
factory or loading dock area or other location not intended to service the general public.
Class IV – Restricted access vehicular gate operator
A vehicular gate operator (or system) intended for use in a guarded industrial location or building such
as an airport security area or other restricted access locations not servicing the general public, in
which unauthorized access is prevented via supervision by security personnel.
In order to complete a proper installation you must satisfy the
entrapment protection chart shown. That means that the installation
must have one primary means of entrapment protection and one
independent secondary means of entrapment protection. Both primary
and secondary entrapment protection methods must be designed,
arranged or configured to protect against entrapments in both the
open and close directions of gate travel.
For Example: For a gate system that is installed on a single-family
residence (UL325 Class I) you must provide the following: As your
primary type of entrapment protection you must provide
• Type A - Inherent (built into the operator) entrapment sensing and at
least one of the following as your secondary entrapment protection:
• Type B1 - Non-contact sensors such as photo-eyes,
• Type B2 - Contact sensors such as gate edges or
• Type D - Constant pressure control.
• Type E - Built-in audio alarm.
Class I
Class II
Class III
Class IV
A, B1, C
or D
A, B1, C,
D or E
A, B1, B2,
D or E
A, B1, B2
or D
A, B1, B2
or B2
A, B1,
D or E
A, B1, C
or C
A, B1, C,
or D, B2
A or C
B1, B2
or D
A
UL325
Installation
Classification
Primary
Type
Secondary
Type
Secondary
Type
Primary
Type
D or E
UL325 MODEL CLASSIFICATIONS
UL325 ENTRAPMENT PROTECTION REQUIREMENTS
This chart illustrates the entrapment protection requirements for each of the four UL325 classes.
NOTE: UL requires that all installations must have warning signs placed in plain view on both sides of the gate to warn pedestrians of
the dangers of motorized gate systems.
Slide Gate Operator
Swing & Gate Barrier
(Arm) Operator
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