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16. Signal relay
The pump has one output for potential-free signal via
an internal relay.
You can set the signal output to Operation, Pump
running, Ready, Alarm and Warning.
The functions of the signal relay appear from the
table below:
Description
Grundfos Eye
The power is
off.
The pump
runs in
Normal mode.
Green, rotating
The pump
runs in
Manual mode.
Green, rotating
The pump is
in operating
mode Stop.
Green, steady
Warning, but
the pump is
running.
Yellow, rotating
Warning, but
the pump runs
in Manual
mode.
Yellow, rotating
Warning, but
the pump was
stopped via a
Stop
Yellow, steady
command.
Alarm, but the
pump is
running.
Red, rotating
Alarm, but the
pump runs in
Manual mode.
Red, rotating
The pump is
stopped due
to an alarm.
Red, flashing
The pump is
stopped due
to Low-flow
Green, steady
stop function.
Contact position of signal relays when activated
Operation
C
NO
NC
Off
C NO NC
C NO NC
NO
NC
C
C NO NC
C NO NC
NO
NC
C
C NO NC
C NO NC
NO
NC
C
C NO NC
Pump
Ready
Alarm
running
NO
NC
NO
NC
NO
C
C
C
C NO NC
C NO NC
NO
C
C NO NC
NO
NC
NO
C
C
C NO NC
NO
NC
NO
C
C
C NO NC
C NO NC
C
NO
C NO NC
C
NO
NC
NO
C
C NO NC
NO
NC
NO
C
C
C NO NC
C NO NC
NO
NC
C
C NO NC
C
NO
NC
C NO NC
C NO NC
NO
NC
NO
NC
C
C
C NO NC
C
NO
NC
C
NO
Operating
mode
Warning
-
NC
NO
NC
C
Normal,
Min. or
Max.
NC
NO
NC
C
Manual
NC
NO
NC
C
Stop
NC
NO
NC
C
Normal,
Min. or
Max.
C NO NC
NC
Manual
C NO NC
NC
Stop
NC
C NO NC
Normal,
Min. or
Max.
NO
NC
C
Manual
NO
NC
C
Stop
NO
NC
C
Normal
NC
C
NO
NC
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