ABB RET670 Applications Manual page 883

1MRK504116-UUS C
Application manual
RS422
RS485
RTC
RTU
SA
SBO
SC
SCS
SCADA
SCT
SDU
SLM
SMA connector
SMT
SMS
SNTP
SPA
SRY
ST
Starpoint
SVC
TC
TCS
TCP
A balanced serial interface for the transmission of digital data
in point-to-point connections
Serial link according to EIA standard RS485
Real-time clock
Remote terminal unit
Substation Automation
Select-before-operate
Switch or push button to close
Station control system
Supervision, control and data acquisition
System configuration tool according to standard IEC 61850
Service data unit
Serial communication module. Used for SPA/LON/IEC/
DNP3 communication.
Subminiature version A, A threaded connector with constant
impedance.
Signal matrix tool within PCM600
Station monitoring system
Simple network time protocol – is used to synchronize
computer clocks on local area networks. This reduces the
requirement to have accurate hardware clocks in every
embedded system in a network. Each embedded node can
instead synchronize with a remote clock, providing the
required accuracy.
Strömberg protection acquisition, a serial master/slave
protocol for point-to-point communication
Switch for CB ready condition
Switch or push button to trip
Neutral/Wye point of transformer or generator
Static VAr compensation
Trip coil
Trip circuit supervision
Transmission control protocol. The most common transport
layer protocol used on Ethernet and the Internet.
Section 7
Glossary
877