Grundfos CRE User Manual

3.5 Signal relays
The pump has two outputs for potential-free signals via two internal relays.
You can set the signal outputs to "Operation", "Pump running", "Ready", "Alarm" and "Warning".
The functions of the two signal relays appear from the table below:
Description Grundfos Eye
Contact position of signal relays when activated
"Operating
mode"
"Operation"
"Pump
running"
"Ready" "Alarm" "Warning"
The power is off.
Off
NCNOC
NCNOC
NCNOC
NCNOC
NCNOC
-
The pump runs in
"Normal" mode.
Green, rotating
C NCNO
C NCNO
C NCNO
NCNOC
NCNOC
"Normal", "Min."
or "Max."
The pump runs in
"Manual" mode.
Green, rotating
C NCNO
C NCNO
NCNOC
NCNOC
NCNOC
"Manual"
The pump is in
operating mode "Stop".
Green, steady
NCNOC
NCNOC
C NCNO
NCNOC
NCNOC
"Stop"
Warning, but the pump
is running.
Yellow, rotating
C NCNO
C NCNO
C NCNO
NCNOC
C NCNO
"Normal", "Min."
or "Max."
Warning, but the pump
runs in "Manual" mode.
Yellow, rotating
C NCNO
C NCNO
NCNOC
NCNOC
C NCNO
"Manual"
Warning, but the pump
was stopped via a
"Stop" command.
Yellow, steady
NCNOC
NCNOC
C NCNO
NCNOC
C NCNO
"Stop"
Alarm, but the pump is
running.
Red, rotating
C NCNO
C NCNO
NCNOC
C NCNO
NCNOC
"Normal", "Min."
or "Max."
Alarm, but the pump
runs in "Manual" mode.
Red, rotating
C NCNO
C NCNO
NCNOC
C NCNO
NCNOC
"Manual"
The pump is stopped
due to an alarm.
Red, flashing
NCNOC
NCNOC
NCNOC
C NCNO
NCNOC
"Stop"
The pump is stopped
due to "Low-flow stop
function".
Green, steady
C NCNO
NCNOC
C NCNO
NCNOC
NCNOC
"Normal"
10
English (US)

Grundfos CRE Specifications

General

Protection Class	IP55
Material	Stainless Steel
Applications	Water supply, pressure boosting, irrigation
Impeller Material	Stainless Steel
Pump Housing Material	Stainless Steel
Connection Size	DN32 to DN200 (depending on model)
Power Supply	3-phase
Control	Integrated frequency converter