Barco R9004460 Owner's Manual page 128

Glossary
RS232
An Electronic Industries Association (EIA) serial digital interface standard specifying the characteristics of the communication path
between two devices using either DB-9 or DB-25 connectors. This standard is used for relatively short-range communications and
does not specify balanced control lines. RS-232 is a serial control standard with a set number of conductors, data rate, word length
and type of connector to be used. The standard specifies component connection standards with regard to computer interface. It is
also called RS-232-C, which is the third version of the RS-232 standard, and is functionally identical to the CCITT V.24 standard.
Logical '0' is > + 3V, Logical '1' is < - 3V. The range between -3V and +3V is a the transition zone.
RS422
An EIA serial digital interface standard that specifies the electrical characteristics of balanced (differential) voltage, digital interface
circuits. This standard is usable over longer distances than RS-232. This signal governs the asynchronous transmission of computer
data at speeds of up to 920,000 bits per second. It is also used as the serial port standard for Macintosh computers. When the
difference between the 2 lines is < - 0.2V that equals with a logical '0'. When the difference is > +0.2V that equals to a logical '1'..
Z-order
The layer sequence in which windows will be displayed in relation to one another.
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