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Terminologies
Access card: A card used for gaining entrance. Maybe
be of several types such as Magnetic card and Proximity card.
Access control: The means of influencing and regulating
the flow of persons through a door (entry and/or exit).
ADA: Americans With Disabilities Act - For more information on
ADA Accessibility Guidelines contact the US Access Board or visit their
website at www.access-board.gov.
Alternating current: or (AC) An electric current that
reverses its direction regularly and continually. The voltage
alternates its polarity and direction of current flow negative
to positive. AC current increases to a peak, decreases through
zero, and peaks in the opposite direction. AC current flows
back and forth in the conductor and is expressed in cycles
per second, or Hertz (Hz).
Backset: The backset is the distance between the edge
of the door to the center of the main hole. The main hole
is usually a round 2 1/8" diameter that the body of the
lock fits through. The distance is usually 2 3/8" or
2 3/4". Today, most commercial and industrial doors are
set for 2 3/4". The trend has been for more private homes
set this way also. These are the two most common backsets.
When measuring the backset make sure to do it carefully. The
difference is small and it's easy to make a mistake especially
if your measuring with the lock still on the door. You may
have noticed that on cheaper lock hardware the backset often
is variable. But this is not the case with the better quality
heavy duty locksets.
Closed circuit or normally closed: (1) An electrical
circuit in which current normally flows until interrupted
by the opening of a switch or a switch-type electronic component.
(2) A circuit or switch in which the contacts are closed during
normal operation
Conductance: The ability of an electrical conductor
to pass current; the reciprocal of resistance. Often used
in exit type of switches where simple hand contact enables
the release of locked door.
Cylinder: A housing that contains a tumbler mechanism
and a key-way plug that can be turned only by the correct
key. It includes a cam or spindle to transmit rotary action
to a lock or latch mechanism. For security and keying versatility,
authorities generally specify a pin-tumbler cylinder of no
fewer than five pins. The two types of cylinders, the mortise
cylinder (round, threaded housing) and the bored lock cylinder
(sometimes called a cylinder insert), which both provide the
same functional value of security and convenience and are
often included in the same keying system.
Deadbolt: A bolt operated manually and not actuated
by springs. When locked, the bolt cannot be forced back. It's
dead untill unlocked. A deadbolt is operated (projected and
retracted) by a key cylinder or lever handle. Deadlatch: A
latch in which the latchbolt is positively held in the projected
position by an auxiliary mechanism. The latch now acts as
a bolt.
Digital Lock: Usualy refers to a stand alone lock
that has a built in keypad and therefore uses digits such
as a telephone keypad to unlock the lock.
Double pole double throw switch: (DPDT): A term used
to describe a switch or relay output contact form (2 form
C) in which two separate switches are operating simultaneously,
each with a normally open and normally closed contact and
a common connection. This form is used to make and break two
separate circuits.
Electric Strike or striker: An electric door locking
device (usually solenoid-operated) that will unlock the door
when electrical power is applied to it. A fail-safe configuration
will operate in the reverse condition (i.e., normally locked
when power is applied and unlocked when power is interrupted).
Entrance Function: Outside knob/lever locked or unlocked
by turning or pushing inside button. Key unlocks knob/lever
from outside. Inside knob/lever always unlocked.
Fail-safe lock: An electric lock or strike that automatically
unlocks with any power interruption. When power is turned
off no locking will occur. All magnetic type locks are always
Fail-safe.
Fail-secure lock: An electric lock or strike that
requires power to unlock. When power is turned off lock will
still be locked. Fail-safe is much more common.
Form C contact: A switch that contains three terminals
normally open, common, and normally closed.
Grade one hardware: locks that are classified grade
one generally are made for commercial installations and can
be used hundreds of times each day and still work for many
years. Even though they are commercial grade, many are used
on homes where people want the strongest hardware possible.
Grade two hardware: locks that are classified grade
two are made for residential use. Grade two hardware should
not be used in commercial installations.
Grade three hardware: this is the lowest quality type
of hardware usually sold in most hardware stores. We strongly
suggest you never use this.
Ground: A conducting connection between an electrical
circuit and the earth or other large conducting body to serve
as an electrical ground, thus making a complete electrical
circuit.
Handing: On some products it's important to know the
handing of the lock. Here is an easy way to figure this out:
stand on the side of the door that you can see the hinges.
If the lock is on the right side of the door (hinges on the
left) you'll need a right hand lock, if the lock is on the
left side of the door (hinges on the right) you'll need a
left hand lock. Also, next to the pictures of most lever locks
we show you a left or right hand lock as a guide. See handing
diagram
Hard-wired: as opposed to wireless - Such as an intercom
that is wired from station to station as opposed to a wireless
or radio frequency intercom.
Interchangeable Core or IC core lock cylinder: a special
lock cylinder that can be removed from the lock with a special
key to rekey without removing the lock. Usually used in commercial
installation
Keyed Alike or (KA): usually refers to more than one lock that
is made to function with the same key.
Keyed Different or (KD): usually refers to locks with different
keys. The opposite of KA
Master Keyed or (MK): When all lock can be locked
or unlocked with one key. Similar to keyed alike but in a
master key system, all locks may be keyed differently but
the master key will override the regular user key. In this
way one key can open all locks and the locks may be all keyed
differently. Useful for office buildings.
Open circuit or normally opened: (1) An electrical
circuit in which current does not flow until permitted by
the closing of a switch or a switch-type electronic component.
(2) A circuit or switch in which the contacts are open during
normal operation
Panic-proof locks: Locks that provide immediate exit
from the inside at all times.
Passage Function: Both knobs/levers always free. Door
can latch closed but not lock.
PU coating: Polyurethane
is applied like a foam to fabric to give it water-resistant
properties. The foam laminate
contains air pockets, which enable the fabric to maintain
breathability.
Relay: An electrically controlled device that opens
and closes electrical contacts to effect the operation of
other devices in the same or another electrical circuit.
Shielded cable: a metallic layer placed around a conductor
or group of conductors to prevent electrostatic interference
between the enclosed wires and external fields.
Single pole double throw switch: or (SPDT): A term
used to describe a switch or relay contact form (1 form C)
that has a normally open and a normally closed contact with
a common connection.
Single pole single throw switch: or (SPST) A switch
with only one moving and one stationary contact, available
either normally open (NO) or normally closed (NC).
Solenoid: An electromechanical device that operates
the lock-bolt or latch part of an electric strike. When electricity
is applied, a mechanical motion is obtained that will move
the bolt. Commonly used within an electric strike.
Stand Alone: When used to describe an access product
it usualy means a pushbutton or card reading lock that does
not require any other products to be a complete system. Usualy
takes the place of a conventional key lock.
Storeroom Function: Outside
knob/lever always locked. Unlocked by key or on board keypad
only. Inside knob/lever always free to turn and open or unlock.
This is the function you'll want to have the lock, lock automatically
every time the door closes. This is the norm with access control.
Left Hand: or (LH) From the outside, if the hinges
are on the left and the door opens in, it's a left hand door.
Right Hand: or (RH) From the outside, if the hinges
are on the right and the door opens in, it's a right hand
door.
Left Hand Reverse: or (LHR) From the outside, if the
hinges are on the left and the door opens out, it's a left
hand door.
Right Hand Reverse: or (RHR) From the outside, if
the hinges are on the right and the door opens out, it's a
right hand door.
160 Prep: 2-3/8" cross bore hole, 1" edge
hole with 1" x 2-1/4" latch mortise
161 Prep: 2-3/4" cross bore hole, 1" edge
hole with 1-1/8" x 2-1/4" latch mortise
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