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REM 543 Protection,
Monitoring and Control
Page 61
Technical Reference Manual
Part 1, General
ABB Network Partner
8.
Glossary
AI
analogue input
BI
binary input
BO
binary output
CB
circuit breaker
CBFP
circuit-breaker failure protection
CPU
central processing unit
CT
current transformer
EMC
electro-magnetic compatibility
HSPO
high-speed power output
I/O
input/output
IRF
internal relay fault
LCD
liquid-crystal display
LED
light-emitting diode
LON®
Locally Operating Network
*)
L/R
local/remote
LV
low voltage
MIMIC
a graphic configuration picture on the LCD of a relay
MMI
man-machine interface
MV
medium voltage
NO/NC
normally open/ normally closed
PCB
printed circuit board
PLC
programmable logic controller
PO
power output
PS
power supply
SO
signalling output
SPA
data communication protocol developed by ABB
SPACOM
ABB product family
TCS
trip circuit supervision
VT
voltage transformer
*) LON is a trademark of Echelon Corporation registered in the United States and other countries.