38 MX3630-01 Rev. J SlideDriver/SlideDriver 50VF Series © 2019 www.hysecurity.com
Manufacturer’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 uid to tank when set-point exceeded
• Bypassed uid 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.
Inherent Entrapment Sensor System – Hydraulic Operators (IES)
The IES sensor:
• Is a normally closed pressure switch on the pump manifold
• Senses uid ow. High pressure spikes above pressure relief valve setting trigger gate obstruction
notication
• Ignores rst second of operation to preclude false trips due to starting pressure spike
An open contact:
• During gate movement signals the Smart Touch Controller to place gate operator into SAFE mode
• While the gate is not operating will generate ERROR 2 (ERR2) - disconnected IES
NOTE: A second open contact, in either direction of travel, will lock the gate operator and ENTRAPMENT
MODE (ENTR) appears on the display.
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