Intermec 4630 User Manual page 236

4630 and 4830 Bar Code Label Printers User's Manual
Printhead Elements
The parts of the printhead that print by placing a mark on the label when
heated. Each element is switched on and off separately in order to react with
the media or thermal transfer ribbon to create a mark on the label.
Printhead Range
The range over which the resistance of the wires that carry energy to the
printhead elements can vary before sending a warning. The wires are tested
with each Printhead Test.
Printhead Test
A test that takes place each time the printer is turned on, or receives a specific
command from the host. This test makes sure the resistance of the wires that
carry energy to the printhead elements are within the acceptable range, which
ensures the temperature of the elements is within the acceptable temperature
range.
Ready
The state in which the printer is able to print; the normal operating state of the
printer.
Ready/Busy Line
Pin 11 of the rear panel connector. Indicates the printer is ready or not ready.
RS-232
Standard for serial binary data interchange. The standard covers the physical,
electrical, and functional characteristics of the interface.
RS-422
Standard for the voltage and impedance levels for serial data transmission on
balanced lines.
RS-485
Standard for allowing multiple devices to share a common set of serial data
communication lines. The signaling is very similar to RS-422. The maximum
number of devices allowed is 32.
Scan
To read a bar code with a device known as a scanner, which converts optical
information into electrical signals.
G-8