Eaton Electrical PROFIBUS-DP EZ204-DP - Manual (Page 198)

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Glossary
MN05013001E 194
Bus terminating resistor Resistor at the beginning and end of a bus line for preventing
disturbance caused by signal reflections and for adapting bus
cables. Bus terminating resistors must always be the last unit
at the end of a bus segment.
Capacitive coupling Capacitive (electrical) coupling develops between two
conductors carrying different potentials. Typical interference
sources are, for example parallel signal cables, contactor
relays and static discharge.
Chassis ground Entirety of all interconnected inactive equipment parts that do
not have any contact voltage, even in the event of a fault.
Coding element Two-part element for the unambiguous allocation of
electronic and basic module.
Command-capable modules Command-capable modules are modules with an internal
memory that are capable of executing particular commands
(such as output substitute values).
Common potential Electrical interconnection of the reference potentials of the
control and load circuit of I/O modules.
Configuring Systematic arrangement of the I/O modules of a station.
CPU Abbreviation for “Central Processing Unit”. Central unit for
data processing, which represents the core element of a
computer.
Digital A value, for example voltage, that can only be represented by
a certain number of states within a defined range, usually
defined as 0 and 1.
DIN Abbreviation for “Deutsches Institut für Normungen e.V.”
(German Institute for Standardization).
Earthing strip Flexible conductor, mostly braided. Interconnects inactive
parts of equipment, e.g. the doors of a control panel and the
switch cabinet body.
Electrical equipment All objects that are used for the generation, conversion,
transfer, distribution and use of electric power, such as
conductors, cables, machines, control devices.