Modbus TCP/IP Modbus RTU protocol which uses TCP/IP and Ethernet
to carry data between devices
NC Normally closed
NO Normally open
PCM600 Protection and Control IED Manager
PO Power output
PRP Parallel redundancy protocol
PTP Precision Time Protocol
RCA Also known as MTA or base angle. Characteristic angle.
REF615 Feeder protection and control relay
RIO600 Remote I/O unit
RJ-45 Galvanic connector type
RS-232 Serial interface standard
RS-485 Serial link according to EIA standard RS485
RSTP Rapid spanning tree protocol
RTD Resistance temperature detector
RTU Remote terminal unit
SAN Single attached node
SLD Single-line diagram
SMV Sampled measured values
SNTP Simple Network Time Protocol
SO Signal output
Single-line diagram Simplified notation for representing a three-phase
power system. Instead of representing each of three
phases with a separate line or terminal, only one
conductor is represented.
TCP/IP
Transmission Control Protocol/Internet Protocol
TCS Trip-circuit supervision
VT Voltage transformer
WAN Wide area network
WHMI Web human-machine interface
1MRS756378 S Section 6
Glossary
REF615 395
Application Manual
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