ABB RELION 615 Series Applications Manual page 219

1MAC109016-MB C
REF615 ANSI
Application Manual
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
Single-line Simplified notation for representing a three-phase power
diagram system. Instead of representing each of three phases with a
separate line or terminal, only one conductor is represented.
SLD Single-line diagram
SNTP Simple Network Time Protocol
SO Signal output
TCP Transmission Control Protocol
TCP/IP Transmission Control Protocol/Internet Protocol
TCS Trip-circuit supervision
UDP User datagram protocol
UL Underwriters Laboratories
VT Voltage transformer
WAN Wide area network
WHMI Web human-machine interface
Section 6
Glossary
213