Grundfos CMBE - Mechanical Installation; Mounting the Tank

• 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.
The inputs and outputs are internally separated from the mains-
conducting parts by reinforced insulation and galvanically separated
from other circuits. All control terminals are supplied with protective
extra-low voltage (PELV), ensuring protection against electric
shock.
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.
Connection terminals for the power supply
Phases Terminals
Three-phase L1, L2, L3, PE
Connection terminals for inputs and outputs
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.
NC
C1
NO
N
L
N
L
PE
NC
C2
NO
10
4
2
5
6
A
Y
B
DI3/OC1
AI1
DI1
+5 V
GND
GENIbus A
GENIbus Y
GENIbus B
GND
+24 V
+24 V
+5 V
GND
GDS TX
GDS RX
AI2
3
15
8
26
23
25
24
7
+5 V
+
+
+
+
+24 V/+5 V+24 V+24 V
+24 V/+5 V+24 V
+24 V GND
OC DI
+24 V
2 3 41
1 2
3 4
TM077676
9
English (US)