Contents - AP Technology

Index
Definition Meaning/Reference
Technical Guidelines
AC Alternating Current
Address-bus The address of the functional module addressed in each case is signalized
on the address-bus
Ampere Unit of electrical current (I)
Amplitude Oscillation width (maximum deflection) of an oscillation process
AS interface Actuator Sensor Interface; intended for networking of actuators, solenoid valves,
power relays, etc., and sensors (optical, inductive, capacitive, etc.). see chapter 3
ATEX Atmosphère explosible (ATEX): EC Code of Practice
Attenuation Reduction of signal amplitude during transmission within media. Increases as
frequency and cable length increase. Thus results in a lower signal level.
AWG American Wire Gauge: Expression for wire diameter. The greater the AWG number,
the smaller the diameter of the wire. The conductor structure (number of wires)
determines the actual cross-section (in mm).
AWM Appliance Wiring Material (UL designation)
Braid density Percentage coverage of the surface of a cable by a braided screening.
Braiding angle Angle between braiding wire and the perpendicular direction of a cable.
Breaking strain Ratio of extension to initial length upon breakage.
Bus / Bus system Network in which a single line leads to all work stations. Information is transmitted
in the form of data packages in the bus system. see also Address Bus,
Data bus, Control bus
Byte 1 Byte = 8 Bit. Data unit which is processed as a unit.
Bit-rate Rate of transmission (bit sequence) of a binary signal.
Cable The DIN standards contain no unequivocal definition of this term.
Cable drum Motor- or spring-driven coiling device for drum-capable cables and trailing cable
systems. Coiling-types: spiral or cylindrical. see Cable Drums
CAN (-Bus) Controller Area Network: ISO 11898 bus system.
Capacitance Capacitive resistance (AC resistance) of a capacitor. see also Inductance
and Reactance
Capacitive coupling Connection of two circuits via a capacitor.
Carrier frequency The carrier frequency is the basic frequency which is modulated with the modulation
frequency. It carriers a modulated signal. The carrier frequency is a fixed frequency,
the amplitude, phase angle or frequency of which is modified at the rhythm of the
modulation frequency, depending on modulation type.
CE European Conformity; e.g. European Low-Voltage Code of Practice 73/23/EEC.
Load-Voltage Code of Practice
CENELEC Comité Européen de Normalisation Electrotechnique
Characteristic wave impedance Ratio of voltage and current of an electrical wave propagating along a homogeneous
cable; measured in Ohm; simultaneously, input resistance of an infinitely long cable
or resistance, with which a finitely long cable must be terminated.
Coaxial cable Consists of a cylindrical inner conductor and one or more hollow outer conductors
(asymmetrical copper conductors). This permits enhanced immunity to interference.
Coaxial cables are used for transmission of asymmetrical signals.
Combustion behaviour Test performed in accordance with VDE 0472, Part 804 or IEC standards. Describes
the behaviour of cables under (direct) exposure to flame.
Concentric conductor Used as fourth conductor and, in some cases, as reinforcement simultaneously.
Condensance Capacitive reactance of an AC circuit.
Conductance Equivalent conductance of an AC circuit.
Conductor types Single-wire, multi-wire, fine-wired, ultra-fine-wired, and sector-type see Tech. Guidelines, Page =16.073 ff
Conductor geometries re: round, single-wire conductor
rm: round, multi-wire conductor
se: sector-type, single-wire conductor
sm: sector-type, multi-wire conductor
Conductor resistance AC resistance of electromagnetic waves in a vacuum.
16.087