ABB RELION 670 Series Communication Protocol Manual page 61

1MRK 511 391-UUS C
670 series 2.2 ANSI
Communication protocol manual
PCI
PCM
PCM600
PC-MIP
PELV circuit
PMC
POR
POTT
Process bus
PRP
PSM
PST
PTP
PT ratio
PUTT
RASC
RCA
RISC
RMS value
RS422
RS485
RTC
RTU
SA
SBO
SC
SCL
SCS
SCADA
Peripheral component interconnect, a local data bus
Pulse code modulation
Protection and control IED manager
Mezzanine card standard
Protected Extra-Low Voltage circuit type according to
IEC60255-27
PCI Mezzanine card
Permissive overreach
Permissive overreach transfer trip
Bus or LAN used at the process level, that is, in near
proximity to the measured and/or controlled components
Parallel redundancy protocol
Power supply module
Parameter setting tool within PCM600
Precision time protocol
Potential transformer or voltage transformer ratio
Permissive underreach transfer trip
Synchrocheck relay, COMBIFLEX
Relay characteristic angle
Reduced instruction set computer
Root mean square value
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
Short circuit location
Station control system
Supervision, control and data acquisition
Section 5
Glossary
55