Installation and Maintenance Manual: RLVAC
Published February 2022
4
Flash
Excess material left on a part by a molding or forming process, created by material
leaking between the separate parts of the mold.
Gapping
The separation of cartons, cases, or totes. Generally done by progressively increasing
the speed of consecutive zones or belts, forcing cartons, cases, or totes to "pull a gap."
Guide Rail
Mechanism used to maintain the desired position of conveyable cartons, cases, or
totes on their respective conveying surface.
HHCS
Hex head cap screw
ID
Inner diameter of a circular, cylindrical or arced body.
Idler Roller
Conveyor roller that is unpowered and used to support a belt.
Infeed
The point where cartons, cases, or totes enter a conveyor or similar unit used in a
material handling system.
Live
A conveyor or zone which runs in response to a simple “enable” signal or runs
whenever power is applied, without any zero pressure accumulation logic.
LOTO
Lockout Tagout
Mark Number
A numeric or alphanumeric term used to uniquely identify a conveyor bed or collection
of beds (of similar model type) within a material handling system.
Match
A mark made on mating conveyor assemblies to assist in identifying orientation and
placement within a system.
MDR
Motorized drive roller; DC powered conveyor roller with an internally mounted motor
which may be controlled via internal or external commutation.
Minimum Pressure
Allows cartons, cases, or totes to lightly touch with up to 2% back pressure while being
conveyed to eliminate product damage.
OAW
Overall width of any given conveyor bed, measured between the outside flanges of the
sideframes.
OD
Outer diameter of a circular, cylindrical, or arced body.
O-Ring
A urethane ring or band with a circular cross section used for power transmission in DC
conveyor applications.
OSHA
Occupational Safety and Health Administration
PE
Photoeye; Device used to detect the presence of an object by sensing a light beam.
Common types are diffuse, retroreflective, and through-beam.
PELV
Protected Extra Low Voltage, a voltage level (less than 60V DC or 25Vrms AC in the
context of EN 60204-1) that is low enough to be safe in the case of indirect or small
area direct contact. PELV circuits are required to be connected to earth ground.
PM
Project Management (or Project Manager)
PO
Purchase Order
Polytier
Heavy duty floor support with a wide stance, capable of supporting multiple levels and
types of conveyor.
PPE
Personal protective equipment
Prox Sensor
A sensor able to detect the presence of nearby objects without any physical contact.
Pulley
Mechanical device used to change the direction of the belt in a conveyor system, to
drive and/or tension the belt.
Reflector
A reflective component needed for retroreflective photoeyes to receive transmitted
light or radiation when no object is in front of the photoeye.
Retroreflective
Of or relating to a surface or device that reflects light or other radiation back to its
source.
Return Idlers
Belt-routing rollers on the underside of any given AC conveyor.
RLCAC
Roller Live Curve AC
RLSAC
Roller Live Spur AC