Grundfos CRE Installation And Operating Instructions Manual page 17

• two analog inputs
• two digital inputs or one digital input and one open-collector
output
• Grundfos Digital Sensor input and output
• two signal relay outputs
• GENIbus connection.
See fig. Connection terminals, optional for CRE, CRIE, CRNE,
CRKE, SPKE, MTRE and CME pumps.
Digital input 1 is factory-set to be start-stop input where
open circuit results in stop. A jumper has been factory-
fitted between terminals 2 and 6. Remove the jumper if
digital input 1 is to be used as external start-stop or any
other external function.
DANGER
Electric shock
Death or serious personal injury
‐
Make sure that the wires to be connected to the
connection groups below are separated from each
other by reinforced insulation in their entire lengths.
• Inputs and outputs
All inputs and outputs are internally separated from the power
supply-conducting parts by reinforced insulation and galvanically
separated from other circuits. All control terminals are supplied by
protective extra-low voltage (PELV), thus ensuring protection
against electric shock.
• Start-stop: (Digital input 1) = Terminals 2 and 6
• Pressure sensor: (Analog input 1) = Terminals 4 and 8
• Pressure switch: (Digital input 3) = Terminals 6 and 10
• External analog signal input: (Analog input 2) = Terminals 7 and
23
GENIbus Terminals A, Y and B
• Signal relay outputs
- Signal relay 1:
LIVE:
You can connect supply voltages up to 250 VAC to the
output.
PELV:
The output is galvanically separated from other circuits.
Therefore, you can connect the supply voltage or protective
extra-low voltage to the output as desired.
- Signal relay 2:
PELV:
The output is galvanically separated from other circuits.
Therefore, you can connect the supply voltage or protective
extra-low voltage to the output as desired.
• Power supply (terminals N, PE, L or L1, L2, L3, PE).
OC
+24 V* GND
+24 V* +24 V* +24 V*/5 V*
+
+24 V* +24 V* +24 V*/5 V*
* If you use an external supply source, there must be a connection
to GND.
Connection terminals, optional for CRE, CRIE, CRNE, CRKE,
SPKE, MTRE and CME pumps
Terminal Type
Normally closed
NC
contact
C1 Common
Normally open
NO
contact
Normally closed
NC
contact
C2 Common
Normally open
NO
contact
10 DI3/OC1
4 AI1
2 DI1
5 +5 V
6 GND
A GENIbus, A
NC
C1
NO
NC
C2
NO
DI
10 DI3/OC1
4 AI1
2 DI1
+
5
+5 V
6 GND
A
GENIbus A
Y
GENIbus Y
B
GENIbus B
3
GND
15
+24 V
8
+24 V
26
+5 V
23
GND
25
GDS TX
24 GDS RX
+5 V*
7
AI2
Function
Signal relay 1
(LIVE or PELV)
Signal relay 2
(PELV only)
Digital input/output,
configurable.
Open collector: Max. 24 V
resistive or inductive.
Analog input:
0-20 mA / 4-20 mA
0.5 - 3.5 V / 0-5 V / 0-10 V
Digital input, configurable
Supply to potentiometer and
sensor
Ground
GENIbus, A (+)
17