Z - Total driver impedance.
Z Axis - The axis in three-dimensional Cartesian coordinates which is usually oriented vertically. Cylindrical coordinates are defined such that the -axis is the axis about which the azimuthal coordinate is measured.
Zone - The absence of output signal or output power.
Zero Output - The specific area of a security system’s coverage, or a term used to describe a specific trigger input such as “door zone” or “sensor zone.”