Signal Relays - Grundfos CRE Series Installation And Operating Instructions Manual

15. Signal relays

The motor has two outputs for potential-free signals via two
internal relays.
The signal outputs can be set to "Operation", "Running", "Ready",
"Alarm" and "Warning".
The functions of the two signal relays appear from the table
below:
Description
Power off.
Pump running in "Normal"
mode
Pump running in "Manual"
mode.
Pump in operating mode
"Stop".
Warning, but the pump is
running.
Warning, but the pump is
running in "Manual" mode.
Warning, but the pump
was stopped via "Stop"
command.
Alarm, but the pump is
running.
Alarm, but the pump is
running in "Manual" mode.
Pump stopped due to an
alarm.
Contact position for signal relays when activated
Grundfos Eye
Operation Running
Off
NO
C
Green, rotating
C NO NC
C NO NC
Green, rotating
Green, steady
NO
C
C NO NC
Yellow, rotating
Yellow, rotating
C NO NC
Yellow, steady
NO
C
Red, rotating
C NO NC
Red, rotating
C NO NC
Red, flashing
NO
C
Ready Alarm
NC NO NC NO NC
C C C
C NO NC C NO NC
C
C NO NC
NO NC
C C
C NO NC
NC NO NC
C C
C NO NC C NO NC
C
C NO NC
C NO NC C
C NO NC
NC NO NC
C C
C NO NC C NO NC
NO NC
C
C NO NC C NO NC
NO NC
C
C NO NC
NC NO NC NO NC
C C
Operating
mode
Warning
-
NO NC NO NC
C
Normal, Min.
or Max.
NO NC NO NC
C
Manual
NO NC NO NC
C
Stop
NO NC NO NC
C
Normal, Min.
or Max.
C NO NC
NO NC
Manual
C NO NC
NO NC
Stop
C NO NC
NO NC
Normal, Min.
or Max.
NO NC
C
Manual
NO NC
C
Stop
NO NC
C
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