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Unit 7: Appendix
S8400 Series Operator Manual
7-23 PN: 9001160B
Print Head
The device on a direct thermal or thermal transfer printer containing the heating elements that
causes an image to be transferred to print media.
Processor
A programmable device that performs all the instruction, logic, and mathematical processing in
a computer - is the brains of the computer. The processor is a microchip that is installed on a
motherboard (primary board) that coordinates hardware components. Also referred to as
“CPU”.
Profile A side view of an item.
Program To enter or send to the processor, the control parameters for electronic equipment to operate.
Proportional To be equal.
Proximity Sensor
A device that detects and signals the presence of a selected object at, or near, the sensor’s
location.
Pulley A toothed wheel for providing movement to a belt.
Quadrant One quarter of the circumference of a circle.
Radial Branching out in equal distances from a common center.
Radius
A straight line from the center of a circle or sphere to its periphery - also the measurement of
its distance.
RAM
(Random Access Memory) A network of electrically-charged points in which a computer stores
quickly accessible data in the form of 0s and 1s. Each storage or memory cell can be directly
accessed if the intersecting row or column is known.
Ratio The quotient of one quantity divided by another of the same kind.
Reader
Relative to RFID, a device containing the digital electronics which extract and separate the
information from the format definition and error management bits.
Read/Write
Relative to RFID, many applications require that new data or revisions to data already in the
tag, be entered while it remains on the object. Some items with this capability of being re-
programmable are read/write tags, memory cards, or memory modules.
Receive Buffer
An area of temporary data storage to help compensate for differences in the transfer rate and
the processing ability of the printer.
Receptacle A female connector to which a male connector may be inserted - typically for electrical current.
Relay
A simple electro-mechanical switch made up of an electromagnet and a set of contacts.
Relays use a small amount of power to energize things that require a greater amount of
energy.
Sometimes relays are serial connected so that one smaller relay activates a larger relay which
in turn, activates another larger still, and so on until the thing that is desired to be activated - is.
Retain To keep or to hold in place.
Retract To withdraw - the opposite of advance.
Resistor
A two-terminal electrical or electronic component that resists the flow of current producing a
voltage drop between its terminals in accordance with Ohm’s law. This electrical resistance is
equal to the voltage drop across the resistor, divided by the current that is flowing through it.
RF/AIS (Radio Frequency Automatic Identification Systems)
RF/DC
Systems that communicate over a radio link between a host computer and a data source. RF/
DC enhances the capabilities of automatic ID Systems by providing the capabilities of hare-
wire data communications without the physical restrictions interconnecting wires.
RFID
(Radio Frequency Identification) A method of identifying unique items using radio waves.
Typically, a reader communicates with a tag, which holds digital information in a microchip. But
there are chipless forms of RFID tags that use material to reflect back a portion of the radio
waves beamed at them.
GLOSSARY