Specifications

87
Impedance The total opposition to alternating current. Impedance is
the vector sum of resistance and reactance. The symbol for
impedance is “Z.” The unit for impedance is the ohm.
X
L
= 10
R = 10
Z = 14.14
R = 10
X
C
= 10
Z = 14.14
Inductance The property of an electrical circuit that opposes changes in
current. Inductance is designated by the symbol “L” and is
measured in henries.
Inductive Proximity Switch A type of sensing switch that uses an electromagnetic coil to
detect the presence of a metal object without coming into
physical contact with it.
Target
(Metal)
Inductive
Proximity
Sensor
Inductive Reactance The opposition to alternating current resulting from circuit
inductance. Inductive reactance is directly proportional to
frequency (f) and inductance (l). The symbol for inductive
reactance is “XL” The unit for inductive reactance is the ohm.
XL = 2πfl
Inductor A device manufactured to have a specific inductance. An
inductor is often made from a coil of wire and is sometimes
called a coil or choke.
A
ir Core Inductor
Iron Core Inductor