PCI
Peripheral component interconnect, a local data bus
PCM
Pulse code modulation
PCM600
Protection and control IED manager
PC-MIP
Mezzanine card standard
PELV circuit
Protected Extra-Low Voltage circuit type according to
IEC60255-27
PMC
PCI Mezzanine card
POR
Permissive overreach
POTT
Permissive overreach transfer trip
Process bus
Bus or LAN used at the process level, that is, in near
proximity to the measured and/or controlled components
PRP
Parallel redundancy protocol
PSM
Power supply module
PST
Parameter setting tool within PCM600
PTP
Precision time protocol
PT ratio
Potential transformer or voltage transformer ratio
PUTT
Permissive underreach transfer trip
RASC
Synchrocheck relay, COMBIFLEX
RCA
Relay characteristic angle
RISC
Reduced instruction set computer
RMS value
Root mean square value
RS422
A balanced serial interface for the transmission of digital data
in point-to-point connections
RS485
Serial link according to EIA standard RS485
RTC
Real-time clock
RTU
Remote terminal unit
SA
Substation Automation
SBO
Select-before-operate
SC
Switch or push button to close
SCL
Short circuit location
SCS
Station control system
SCADA
Supervision, control and data acquisition
1MRK 511 391-UUS C
Section 5
Glossary
670 series 2.2 ANSI
55
Communication protocol manual
Summary of Contents for Relion 670 series
Page 1: ...RELION 670 SERIES DNP 670 series Version 2 2 Communication protocol manual...
Page 2: ......
Page 30: ...24...
Page 54: ...48...
Page 65: ...59...