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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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