Grundfos CU 362 Instrucciones De Instalación Y Funcionamiento página 15

5.4 Float switch connection
Install the float switches as recommended to ensure easy and correct installation. See fig.
Float switch installation
Pos. Description
A Connect float switch 1 (lowest switch) to terminals 10 (DI1) and 11 (GND).
B High-level float switch?
C Yes
D No
E Connect float switch 5 (high level) to terminals 12 (DI2) and 11 (GND).
F Connect float switch 2 to terminals 14 (DI3) and 13 (GND).
G Connect float switch 3 to terminals 46 (DI9) and 47 (GND).
H Connect float switch 4 to terminals 44 (DI8) and 47 (GND).
I Connect float switch 2 to terminals 12 (DI2) and 11 (GND).
J Connect float switch 3 to terminals 14 (DI3) and 13 (GND).
K Connect float switch 4 to terminals 46 (DI9) and 47 (GND).
L Connect float switch 5 to terminals 44 (DI8) and 47 (GND).
Installations with two pumps and five float switches
Example 1
Float switch Unit/module
Float switch 5 CU 362
Float switch 4 IO 351B-1
Float switch 3 IO 351B-1
Float switch 2 CU 362
Float switch 1 CU 362
Example 2
Float switch Unit/module
Float switch 5 IO 351B-1
Float switch 4 IO 351B-1
Float switch 3 CU 362
Float switch 2 CU 362
Float switch 1 CU 362
A
B
C
D
E
5
F
4
G 2
1
H
Signal (terminal)
DI2 (12), GND (13)
DI8 (44), GND (47)
DI9 (46), GND (47)
DI3 (14), GND (13)
DI1 (10), GND (11)
Signal (terminal)
DI8 (44), GND (47)
DI9 (46), GND (47)
DI3 (14), GND (13)
DI2 (12), GND (13)
DI1 (10), GND (11)
Float switch installation.
I
J
K
L
Description
High level
Start 2
Start 1
Stop
Dry running
Description
Start 2
Alarm
Start 1
Stop
Dry running
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