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11.4 Electrical Data
Terminal
Designation
or Number
L, N, PE
A, Y, B
1 - 4
5
6
7
8
11 and 13
12
14
15
16
17
20 and 30
29
21, 22, 23, 24
25, 26, 27, 28
31 - 33
41 - 43
Terminal
Designation
or Number
L, N, PE
1, 2, 3
4, 5, 6
7, 8, 9
Function PFU 2000
Voltage supply for PFU 2000.
Communication among the units in the GRUNDFOS
Pump Management System 2000.
Analog/digital input for motor protection.
Motors 1, 2, 3, 4.
Monitoring of frequency converter.
Analog control signal for frequency converter.
Connection of external LED (fault).
Connection of external LED (operation).
DC 24 V supply for transmitter.
Analog input 1:
Actual value in the system.
Note: In systems without PMU 2000, pressure trans-
mitters with the following possible signal values are typ-
ically used: 0-10 V, 0-20 mA and 4-20 mA.
In systems with PMU 2000, pressure, differential-pres-
sure or temperature transmitters can be used.
Analog input 2:
Input for pressure, pre-pressure, flow-pipe and return-
pipe temperature measuring.
Note: In all systems without PMU 2000, this input is
always used for pre-pressure measuring.
Input signal can be inverted by means of the DIP 1 con-
tact 4.
Analog input 3:
Signal for remote setting of setpoint.
Note: In systems without PMU 2000, only DC 0-10 V
can be used.
Digital input 4: (Without PMU 2000)
For pressure boosting and water supply applications,
input 4 is laid out for a flow switch.
For heating, air-conditioning and ventilation systems,
input 4 is laid out for an external on/off switch.
Connection of external reset button, for instance in the
front cover of the control cabinet, or external potentio-
meter for the setting of setpoint.
Contactor coil voltage.
Frequency converter on/off.
On/off of motors 1, 2, 3, 4. Mains operation.
On/off of motors 1, 2, 3, 4.
Frequency converter operation.
Fault signal relay.
Operating signal relay.
Function PMU 2000
Voltage supply for PMU 2000.
Operating signal relay.
Fault signal relay.
Communication among the units in the GRUNDFOS
Pump Management System 2000.
Technical Data
1 x 230-240 V +6% /–10%, 50 Hz, PE.
GRUNDFOS BUS. RS-485, GRUNDFOS BUS proto-
col.
PTC or thermal switch (NC).
PTC according to DIN 44081 or 44082.
NC contact.
DC 0-10 V.
Positive (anode), maximum 5 mA.
Positive (anode), maximum 5 mA.
Maximum 70 mA.
0-10 V.
0-20 mA.
4-20 mA.
NTC 50:
Measuring range: –25 °C to +50 °C.
Resistance value at 25 °C: 30 kŸ.
NTC 150:
Measuring range: 0 °C to +150 °C.
Resistance value at 25 °C: 100 kŸ.
0-10 V.
0-20 mA.
4-20 mA.
On/off contact (digital).
NTC 50:
Measuring range: –25 °C to +50 °C.
Resistance value at 25 °C: 30 kŸ.
NTC 150:
Measuring range: 0 °C to +150 °C.
Resistance value at 25 °C: 100 kŸ.
DC 0-10 V.
0-20 mA.
4-20 mA.
Maximum contact load: 12 V / 12 mA.
Maximum contact load: 12 V / 12 mA.
Maximum contact load: 250 V / 8 A, AC1.
Maximum contact load: 250 V / 8 A, AC1.
Potential-free changeover contacts.
Maximum contact load: 250 V / 0.5 A, AC1.
Potential-free changeover contacts.
Maximum contact load: 250 V / 0.5 A, AC1.
Technical Data
1 x 230-240 V +6% /–10%, 50 Hz, PE.
Potential-free changeover contacts.
Maximum contact load: 250 V / 1.0 A, AC1.
Potential-free changeover contacts.
Maximum contact load: 250 V / 1.0 A, AC1.
GRUNDFOS BUS. RS-485, GRUNDFOS BUS proto-
col.
31
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