Technical information (continued)
Electrical data PFU and PMU
PFU Terminal
Designation or Function PFU 2000 Technical data
Number
L, N, PE Voltage supply for PFU 2000. 1 x 115V +/- 10%, 60 Hz, PE
1 x 230-240V + 6% / -10%, 60 Hz, PE
A, Y, B Communication among the units in the GRUNDFOS BUS, RS-485, GRUNDFOS BUS protocol
Grundfos Pump Management System 2000
1-4 Analog/digital input for motor protection PTC or thermal switch (NC)
5 Monitoring of variable frequency drive NC contact
6 Analog control signal for variable frequency drive DC 0-10V
7 Connection of external LED (fault) Positive (anode), maximum 5 mA
8 Connection of external LED (operation) Positive (anode), maximum 5 mA
11 and 13 DC 24V supply for transmitter Maximum 70 mA
ANALOG INPUT 1: DC 0-10V
12
Actual value in the system 0-20 mA 4 - 20 mA
14 ANALOG INPUT 2: DC 0-10V
Input for pre-pressure 0-20 mA
Input signal can be inverted by means of the 4-20 mA
DIP1, Contact 4 On/off contact (digital)
ANALOG INPUT 3: DC 0-10V
15 Signal for remote setting of set-point. Note: In 0-20 mA
systems without PMU 2000, only DC 0-10V 4-20 mA
can be used
16 DIGITAL INPUT 4: For remote on/off, flow Maximum contact load: 12V / 12 mA
switch, etc.
17 Connection of external reset button, for instance, Maximum contact load: 12V / 12 mA
in the front cover of the control cabinet, or
external potentiometer for selecting the set-point
20 and 30 Contactor coil voltage ____
29 Variable frequency drive on/off ____
21, 22, 23, 24 On/off of motors 1, 2, 3, 4. Mains-operation Maximum contact load: 250V / 8 A, AC1
25, 26, 27, 28 On/off of motors 1, 2, 3, 4. Maximum contact load: 250V / 8 A, AC1
Variable frequency drive operation
31 - 33 Fault signal relay Potential-free contacts
Maximum contact load: 250V / 0.5 A, AC1
41 - 43 Operating signal relay Potential-free contacts.
Maximum contact load: 250V / 0.5 A, AC1
Function PMU 2000
L, N, PE Voltage supply for PMU 2000 1 x 115V +/- 10%, 60 Hz, PE
1 x 230-240V + 6% / -10%, 60 Hz, PE
1, 2, 3 Operating signal relay Potential-free contacts
Maximum contact load: 250V / 1.0 A, AC1
4, 5, 6 Fault signal relay Potential-free contacts
Maximum contact load: 250V / 1.0 A, AC1
7, 8, 9 Communication among the units in the GRUNDFOS BUS, RS-485, GRUNDFOS BUS
Grundfos Pump Management System 2000 protocol.
Mains supply
Main Power Control 2000 See BoosterpaQ nameplate and electrical print for
Switch phase and voltage requirement.
38
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