17 Glossary
100BASE-FX A physical medium defined in the IEEE 802.3 Ethernet standard for local
area networks (LANs) that uses fiber optic cabling
100BASE-TX A physical medium defined in the IEEE 802.3 Ethernet standard for local
area networks (LANs) that uses twisted-pair cabling category 5 or higher
with RJ-45 connectors
AC Alternating current
ACT
1. Application Configuration tool in PCM600
2. Trip status in IEC 61850
CAT 5 A twisted pair cable type designed for high signal integrity
CAT 5e An enhanced version of CAT 5 that adds specifications for far end cross-
talk
CBB Cycle building block
COMTRADE Common format for transient data exchange for power systems. Defined
by the IEEE Standard.
CPU Central processing unit
CT Current transformer
CTS Clear to send
DAN Doubly attached node
DC
1. Direct current
2. Disconnector
3. Double command
DCD Data carrier detect
DFT Discrete Fourier transform
DHCP Dynamic Host Configuration Protocol
DNP3 A distributed network protocol originally developed by Westronic. The
DNP3 Users Group has the ownership of the protocol and assumes re-
sponsibility for its evolution.
DPC Double-point control
DSR Data set ready
DT Definite time
DTR Data terminal ready
EEPROM Electrically erasable programmable read-only memory
EIA-232 Serial communication standard according to Electronics Industries Asso-
ciation
EIA-485 Serial communication standard according to Electronics Industries Asso-
ciation
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1MRS758755 C Glossary
REC615 & RER615
Technical Manual
865
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