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Dewatering
Pos.
Description
1
High level
2
Start level P2: start level for pump 2
3
Start level P1: start level for pump 1
4
Stop level
5
Dry-running level
The pump starts to empty the tank or well when Start level P1 is
reached.
A second pump starts when the liquid level reaches Start level P2.
The pump stops when the liquid level is lowered to Stop level.
If the inflow of liquid exceeds the capacity of the installed pump, the
level in the tank or well starts to rise. Eventually, the High level
sensor registers a high liquid level in the tank or well. If set, the
signal from the High level sensor can be used to activate an output
relay which can then be used to give a visual or acoustic alarm or
send a signal to a SCADA system.
If the pump is running and the liquid level in the tank or well falls
below the dry-running level, the dry-running protection stops the
pump to ensure that it is not damaged mechanically.
Fill
Pos.
Description
1
High level
2
Stop level
3
Start level P1: start level for pump 1
4
Start level P2: start level for pump 2
5
Dry-running level
In the filling application, the pump is installed in a tank or well from
where it pumps the liquid. The liquid is pumped into a second tank
where the level sensors are installed.
The pump starts to fill the second tank when Start level P1 is
reached.
A second pump starts when the liquid level reaches Start level P2.
The pump stops when the liquid level reaches Stop level.
If the pump for some reason does not stop at Stop level and the
liquid level keeps rising, the High level sensor eventually
registers this. If set, the signal from the High level sensor can be
used to activate a relay output which can then be used to give a
visual or acoustic alarm or send a signal to a SCADA system via a
communication interface.
If the pump is running and the liquid level in the tank falls below the
dry-running level, the dry-running protection stops the pump to
ensure that it is not damaged.
1
Related information
6.1 Setting the application type with Grundfos GO Remote
2
6.16.1 Automatic operation
3
4.5 Terminals
4
5
33
32
31
30
29
28
27
26
Pos.
1
1
2
2
3
3
4
4
5
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
1
2
3
4
ON
1 2
IO 242
GENI
Max. 2A
480Y / 277V
AC
25
24
23 22
21 20 19 18 17 16 15 14 13
Remember to separate potentially low-voltage cables
from potentially high-voltage cables when connecting
them to the control unit.
Description
Current transformer, pump 1. Optional.
Current transformer, pump 2. Optional.
GENIbus
Switch for termination resistor, SW1
Not in use
Supply voltage, 24 VDC
User-configurable output relay 4, normally closed
User-configurable output relay 4, common
User-configurable output relay 4, normally open
User-configurable output relay 3, normally open
User-configurable output relay 3, common
User-configurable output relay 3, normally closed
Supply voltage for sensors, 24 VDC, max. 50 mA
Ground, GND
User-configurable analog or digital input
Ground, GND
Digital input 4
Ground, GND
Digital input 3
Ground, GND
Digital input 2
Ground, GND
5
6
Max. 2A
7
8
9
10
11
12
13
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