Siemens SENTRON PAC4200, Manual, Page: 247 / 252

SENTRON PAC4200
Manual, 09/2008, A5E02316180B-01
247
Glossary
100BaseT
Fast Ethernet standard (100 Mbit/s) for data transmission on twisted-pair cables.
10BaseT
Standard for the transmission of 10 Mbit/s Ethernet on twisted-pair cables.
Autonegotiation
Ability of a device to automatically detect the fastest possible transmission rate, and to send
and receive at this rate.
AWG
American Wire Gauge (AWG) is a specification for wire diameters that is mainly used in
North America.
Bus
Shared transmission path over which all devices on the communication bus are connected. It
has two defined ends. In the case of PROFIBUS, the bus is a twisted pair or optical fiber
cable.
Bus system
All nodes physically connected to a bus cable form a bus system.
Demand period
Period to which the calculation of the power demand refers. A demand period is typically 15,
30, or 60 minutes long.
A distinction is made between the current period and the instantaneous period. The current
period is the last completed period. The instantaneous period is the period still in progress
and has not yet been completed.
Equipotential bonding
Electrical connection (equipotential bonding conductor) which brings the bodies of electronic
equipment and foreign conductive bodies to an equal or approximately equal potential. This
prevents disruptive or dangerous voltages between these bodies.