Entrapment Protection
Effective January 12th, 2016 UL 325 Standard of Safety requires all automated gate operators be able to
monitor for entrapment protection sensors. Before gate movement occurs, the UL 325 compliant HySecurity
gate operator verifies that the external entrapment protection sensors are connected and fully functional.
The site designer or installer must determine which external entrapment protection sensors will be installed
with the gate operator to create a UL 325 compliant installation site.
The following bullet points highlight how your automated gate system sites can monitor sensors (external
entrapment protection sensors) using HySecurity gate operators:
•
Normally Closed (NC) sensors
- Installing Normally Closed output sensors. External entrapment
protection NC sensors are “monitored” by HySecurity gate operator software.
•
Build Year (BY)
- An added menu item distinguishes between pre-2016 manufacturing dates and
UL 325 - 2016 manufacturing dates. Build Year (BY) is a factory-setting. Build Year 2 (BY 2) is the
default for all HySecurity gate operators indicating a manufacturing date of 2016 in the serial number.
Replacement controller boards for existing sites allow for a Build Year setting of 1 (BY 1, pre-2016).
•
Independent Sensor Inputs
- The edge, photo eye and photo eye COM inputs on the Smart Touch
Controller (STC) have been re-labeled. The same wiring connections become three independent
methods for easy entrapment sensor configuration and normally closed outputs.
NOTICE:
To enable fully automatic operation, the gate operator requires a MINIMUM of one external
entrapment protection sensor to monitor potential entrapment zones in either the open or close direction
of travel.
m
anufacturer
’
S
reSpOnSiBiLity
• Build into the gate operator a means of detecting an obstruction or an inherent entrapment detection
sensor
• Monitor input from external entrapment detection sensors
• Provide warning signs and an installation manual which, if followed, will result in a UL 325 compliant
installation
Pressure Relief Valve – All Hydraulic Operators:
• Limits hydraulic system pressure
•
Bypasses fluid to tank when set-point exceeded
•
Bypassed fluid triggers the IES
NOTICE:
Pressure relief valve adjustments establish the threshold for the Inherent Entrapment Sensor (IES). The
optimal pressure setting produces uniform gate travel and trips the IES when the gate encounters an
obstruction.
© 2018
Entrapment Protection
MX3636-01 Rev. D
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