Glossary
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05/01 AWB2700-1384GB
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ground reference Potential of ground in a neutral
grounding device. Unlike earth
whose potential is always zero, it
may have any potential except zero.
I/O Input/output.
inactive metal components Conductive components that cannot
be touched and are electrically
separated from active metal
components by insulation but can
adopt voltage in the event of a fault.
lightning protection All measures that are taken to
protect a system from damage due
to overvoltages from lightning.
low resistance connection massExpression used to describe all
interconnected inactive components
that do not become live due to a
fault.
master Station or subscriber in a bus system
that controls the communication
between other bus subscribers.
master/slave mode Mode of operation in which one
station takes over the control of the
system as a master.
module With
WIN
bloc, this is identical to a
bus system subscriber.
multi-master mode Operating mode in which all
stations in the system have equal
rights.
operational parts,
electrical All objects that produce, convert,
transmit, distribute or utilize
electrical power (e.g. conductors,
cable, machines, control devices).
PLC Programmable Logic Controller -
storage programmed control.
potential compensation The matching of electrical levels of
the bodies of electrical parts and
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