Wiring Diagram - Grundfos UPED 50-12 Montage- Und Betriebsanleitung

4.2 Wiring diagram

Signal output
1 2 3
NC NO C
Fig. 5
Note:
• A possible external controller is to be connected
to the master pump (terminals 7 to 12).
• If the pump is to be connected to a PMU 2000 or
PCU 2000, it must be set to single-pump opera-
tion, see supplement to these instructions.
• If no external on/off switch is connected, the con-
nection across terminals 7 and 8 should be main-
tained.
• If the 0-10 V input is used (terminals 11 and 12),
there must be a connection across terminals
7 and 9 (the input for the min. curve must be
closed).
• All cables used must be heat-resistant up to at
least +85°C.
• All cables used must be installed in accordance
with EN 60204-1.
4
1 2 3
Differential pres-
sure and temper-
ature sensor
Bus signal
used for
master/slave
communication
A Y B
4 5 6 7 8
Stop
L3
5 6 7 8 9 10 11 12
Mains connection
Start/stop
Min. curve
(night-time duty)
Max. curve
Analog 0-10 V
input
9 10 11 12
DC 0-10 V
Min. Max.
• Wires connected to
- outputs 1 to 3,
- inputs 4 to 12,
- supply terminals and
- differential pressure and temperature
sensor
must be separated from each other and
from the supply by reinforced insulation.
• All leads connected to a terminal block
must be tied up at the terminals.
Concerning demands on signal wires and signal
transmitters, see section 10. Technical data.
A connection example can be found on page 172.
L2 L1
L3 L2
L1
129