SIGNAL WORD
Description of the hazard
Consequence of ignoring the warning
• Action to avoid the hazard.
1.3 Notes
The symbols and notes below may appear in
Grundfos installation and operating instructions,
safety instructions and service instructions.
Observe these instructions for explosion-
proof products.
A blue or grey circle with a white graphical
symbol indicates that an action must be
taken.
A red or grey circle with a diagonal bar,
possibly with a black graphical symbol,
indicates that an action must not be taken
or must be stopped.
If these instructions are not observed, it
may result in malfunction or damage to the
equipment.
Tips and advice that make the work easier.
1.4 Abbreviations and definitions
AI Analog input.
AL Alarm, out of range at lower limit.
AO Analog output.
AU Alarm, out of range at upper limit.
CIM Communication interface module.
Current
sinking
The ability to draw current into the
terminal and guide it towards earth in
the internal circuitry.
Current
sourcing
The ability to push current out of the
terminal and into an external load
which must return it to earth.
DI Digital input.
DO Digital output.
ELCB Earth leakage circuit breaker.
FM Functional module.
GDS
Grundfos Digital Sensor, factory-
fitted.
GENIbus
Proprietary Grundfos fieldbus
standard.
GFCI Ground fault circuit interrupter.
GND Protective earth.
Grundfos
Eye
Status indicator light.
LIVE
Low voltage with the risk of electric
shock if the terminals are touched.
OC
Open collector: Configurable open-
collector output.
PE Protective earth.
RCCB Residual-current circuit breaker.
RCD Residual-current device.
SELV
Safety extra-low voltage. A voltage
that cannot exceed ELV under normal
conditions and under single-fault
conditions, including earth faults in
other circuits.
STO
Safe Torque Off. A sub safety
function, where a drive does not
actively generate any torque and
coasts freely.
6
English (GB)
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