Controlled Products Systems Group SW4705011G3 - Manual (Page 4)

4
UL325 MODEL CLASSIFICATIONS (CON’T)
SAFETY ACCESSORY SELECTION-
All UL325 compliant LiftMaster gate opera-
tors will accept external entrapment protection
devices to protect people from motorized gate sys-
tems. UL325 requires that the type of entrapment
protection correctly matches each gate application.
Below are the 6 types of entrapment protection rec-
ognized by UL325.
Entrapment Protection Types-
Type A: Inherent obstruction sensing system, self-
contained within the operator. This system
must sense and initiate the reverse of the
gate within two seconds of contact with
a solid object.
Type B1: Connections provided for a non-contact
device, such as a photo eye can be used
as a secondary protection.
Type B2: Connections provided for a contact sensor.
A contact device such as a gate edge can
be used for secondary protection.
Type C: Inherent adjustable clutch or pressure relief
valve.
Type D: Connections provided for a control
requiring continuous pressure to operate
the operator open and close.
Type E: Built-in audio alarm. Examples include
sirens, horns or buzzers.
Additionally UL requires that all installations
must have warning signs in place to warn pedestri-
ans of the dangers of motorized gate systems. Many
signs and labels are included with each operator.
These should be placed in plain view on both sides
of the gate.
UL325 Entrapment Protection Requirements-
The following chart illustrates the entrapment
protection requirements for each of the 4 UL325 classes
(For more information on UL325 classes refer to previ-
ous page.
In order to complete a proper installation you
must satisfy the entrapment protection chart shown
above. That means that the installation must have one
primary means of entrapment protection and one inde-
pendent 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 opera-
tor) entrapment sensing and at least one of the following
as your secondary entrapment protection: Type B1-
Non-contest sensors such as photo-eyes, Type B2-
Contact sensors such as gate edges or Type D-
Constant pressure control.
Gate Operator Entrapment Protection
UL325
Installation
Class
Slide Gate Operator
Swing & Gate Barrier
(arm) Operator
Class I & II
Class III
Class IV
Primary
Type
Secondary
Type
Primary
Type
Secondary
Type
A B1, B2 or D A or C A, B1, C or
DA, B1
A, B1, B2,
or B2
A, B1,
D or E
A, B1, C,
or C
D or E
A, B1, B2
or D
A, B1, B2,
D or E
A, B1, C
or D
A, B1, C,
D or E
CPS Series Photo Eyes
-Type B1 entrapment protection
Miller Edge
-Type B2 entrapment protection
This document is current with the UL325 specification at the time of printing. However please check the most
current version of UL325 for update information.