ABB REF 54 Series Technical Reference Manual page 97

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Technical Reference Manual, General
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AI analogue input
CB circuit breaker
CBFP circuit-breaker failure protection
CPU central processing unit
CT current transformer
DI digital input
DO digital output
EMC electro-magnetic compatibility
GND ground
HMI human machine interface
HSPO high-speed power output
I/O input/output
IRF internal relay fault
LCD liquid-crystal display
LED light-emitting diode
®
LON Local Operating Network
L M TM L
ON ARK ON
world-wide industry association, which facilitates the
development and implementation of open, interoperable
LonWorks based control products and systems.
®
L W technology for intelligent distributed control
ON ORKS
L/R local/remote
LV low voltage
MIMIC a graphic configuration picture on the LCD of a relay
MV medium voltage
NO/NC normally open/ normally closed
PCB printed circuit board
PLC programmable logic controller
PO power output
POD protocol object dictionary
PS power supply
RTD resistance temperature device
SNVT standard network variable type
SO signal output
SMS substation monitoring system
SPA data communication protocol developed by ABB
SPACOM ABB product family
TCR thermal coefficient of resistance
TCS trip circuit supervision
VT voltage transformer
1) LON and L W are trademarks of Echelon Corporation registered in the United States and
ON ORKS
other countries. L M
ON ARK
1
M interoperability association is an independent
ARK
is a trademark of Echelon Corporation.
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