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AC: Alternating Current. An electric current or voltage that reverses direction at regular intervals.
Alternate Action: Ability to open and close a fully open gate by using the same open command.
Arc:
The area that is swept by a swing gate from fully closed to bully open position.
ATG:
Anti-tailgating refers to a method of immediately closing an opening gate behind a vehicle so
that an unauthorized vehicle cannot follow the authorized vehicle through the gate.
DC:
Direct Current. An electric current of constant value flowing in one direction only.
Dynamic braking:
Fault:
An abnormal condition which causes the gate to stop to protect the gate and the user.
Gate sensitivity:
Gear Box: A device that changes the speed and power of its driving force (motor).
Inrush current:
Interrupt Bar or Edge:
LED:
Light Emitting Diode. LEDs are indicators placed on the controller board which light up to
indicate an action in the system.
Limit switch: The closure of this switch indicates the gate has reached its open or close limit, causing
the gate to stop. There are two limit switches, open and close.
Limit cam:
The excursion of this object corresponds to the gate traveling distance and closes the
limit switch at the open or close limit of the gate.
Loop sensor: A wire embedded in the ground for magnetically sensing large metallic objects (cars).
Exit or Open Loop:
Interrupt or Reverse or Reopen Loop: activation reverses or stops the gate.
Shadow Loop:
is inside the arc of a swing gate.
Loop detector:
Master/Slave: A synchronized system containing a pair of gate operators.
Maglock:
An electric magnet which is used to secure the closed gate.
Power Fail Option:
Pulley: A grooved wheel which transfers power via a belt.
Reclose Timer:
Retry: A condition at which the stopped gate resumes its course automatically after the occurrence of a
Fault.
RPM:
Rotation Per Minute is a term to indicate the speed of a rotary object.
Sprocket: A toothed wheel which transfers power via a chain.
Thermal overload:
Torque:
A force that causes rotation.
Torque Limiter:
38 of 40
GLOSSARY
Stopping the gate by activating the forward and reverse windings of the gate
operator motor in each half AC cycle.
The response of the gate operator to an exerting force to the gate.
Initial current drawn into an electrical device due to its capacitive or inductive nature.
A switch which is installed at the edge of a gate to protect an object which is
situated between the gate and the gate frame.
activation opens the gate.
activation prevents a fully open or close gate from moving while a vehicle
An electronic device that is activated by a loop sensor sensing a metallic object.
A battery backup system which opens or closes the gate at power outage.
An electronic timer which closes the fully open gate automatically.
A condition at which a heat producing device shuts off automatically when it
reaches a critical and damaging temperature level.
A clutch-like mechanism used to relieve excessive torque generated by the gate on
the gate operator.
Doc 6001343 (01-20299)
Rev B
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