Rev C
Doc 6001242 (01-20273)
51 of 53
GLOSSARY
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 fully open position.
ATG:
Anti-tailgating refers to a method of immediately closing an opening gate behind a vehicle so
that an unauthorized vehicle can not follow the authorized vehicle through the gate.
DC:
Direct Current. An electric current of constant value flowing in one direction only.
Dynamic braking:
Stopping the gate by activating the forward and reverse windings of the gate
operator motor in each half AC cycle.
Fault:
An abnormal condition which causes the gate to stop to protect the gate and the user.
Gate sensitivity:
The response of the gate operator to an exerting force to the gate.
Gear Box:
A device that changes the speed and power of its driving force (motor).
Inrush current:
Initial current drawn into an electrical device due to its capacitive or inductive nature.
Interrupt Bar or Edge:
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.
LED:
Light Emitting Diode. LEDs are indicators placed on the controller board which light up to
indicate an action in the system.
Limit switch:
A switch which its closure 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:
An object which its excursion 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).
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Exit or Open Loop:
activation opens the gate.
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Interrupt or Reverse or Reopen Loop:
activation reverses or stops the gate.
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Shadow Loop:
activation prevents a fully open or closed gate from moving while a vehicle
is inside the arc of a swing gate.
Loop detector:
An electronic device that is activated by a loop sensor sensing a metallic object.
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:
A battery backup system which opens or closes the gate at power outage.
Pulley:
A grooved wheel which transfers power via a belt.
Reclose Timer:
An electronic timer which closes the fully open gate automatically.
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 an rotary object.
Sprocket:
A toothed wheel which transfers power via a chain.
Thermal overload:
A condition at which a heat producing device shuts off automatically when it
reaches a critical and damaging temperature level.
Torque:
A force that causes rotation.
Torque Limiter:
A clutch-like mechanism used to relieve excessive torque generated by the gate on
the gate operator.
