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• 1-5 • RMAN-QLS-002 rev. A
Section 1: QL introduction
Description
The Zebra QL220, QL 220 Plus; QL320, QL 320 Plus; QL420 and QL 420 Plus Mobile
Printer s are low-cost, portable, direct thermal printers. They can be carried by the
shoulder strap, sit on a work space, or be mounted to a specic location. They are
powered by a Li-Ion battery pack which makes them particularly useful in environments
where AC power is not readily available. The QL series of printers delivers traditional
Zebra reliability in a transportable label printer for the mobile work environment.
Operating Modes
• Tear-Off Mode. The operator tears off a single label (or a strip of labels) after
printing.
• Peel-Off Mode. The liner is peeled away from the label as it prints, the printer
waits until the operator removes the label, and then the next label prints.
Printing Technology
The QL series printers utilize direct thermal printing wherein a substrate, typically pa-
per, is coated with a chemical that changes to a dark color upon exposure to heat over a
period of time to form an image.
Communications
Communications between QL series printers and a host terminal can occur in four
basic ways:
• By a cable between the printer and its host terminal using either RS-232C or USB
2.0 communication protocols.
• Linking to a host terminal via Infrared (usually by means of the industry standard
IrDA protocol)
• By means of a Bluetooth
®
short range radio frequency link.
• By means of a wireless LAN (Local Area Network) per 802.11 specications.
Use of this manual presumes a familiarity with the QL series printers. Complete
information regarding the operation, features and specications of the QL series
printers can be found in the QL Series User Guide which can be found on-line at
www.zebra.com/manuals.