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<strong>Grundfos</strong> E-<strong>pumps</strong><br />
4<br />
Wiring diagram<br />
1 x 200-240 V - 10 %/+ 10 %, 50/60 Hz<br />
External switch<br />
N<br />
L<br />
PE<br />
ELCB<br />
Max. 10 A<br />
Fig. 48 Wiring diagram, single-phase MLE motors<br />
Other connections<br />
N<br />
PE<br />
L<br />
Figure 49 shows the connection terminals of external<br />
potential-free contacts for start/stop and digital<br />
function, external setpoint signal, sensor signal,<br />
GENIbus and relay signal.<br />
Note: If no external on/off switch is connected,<br />
short-circuit terminals 2 and 3 using a short wire.<br />
Note: As a precaution, the wires to be connected to<br />
the following connection groups must be separated<br />
from each other by reinforced insulation in their entire<br />
lengths:<br />
• Group 1: Inputs<br />
– External start/stop (terminals 2-3)<br />
– Digital input function (terminals 1-9)<br />
– Setpoint (terminals 4, 5, 6)<br />
– Sensor signals (terminals 7-8)<br />
– Bus connection (terminals B, Y, A).<br />
All inputs (group 1) are internally separated from<br />
the power supply-conducting parts by reinforced<br />
insulation and galvanically separated from other<br />
circuits. All control terminals are supplied by<br />
protective extra-low voltage (PELV), thus ensuring<br />
protection against electric shock.<br />
• Group 2: Output<br />
– Relay signal (terminals NC, C, NO)<br />
The output (group 2) is galvanically separated<br />
from other circuits. A maximum supply voltage of<br />
250 volts can be connected to the output as<br />
desired.<br />
• Group 3: Power supply (terminals N, PE, L).<br />
A galvanically safe separation must fulfill the<br />
requirements for reinforced insulation including<br />
creepage distances and clearances specified in<br />
EN 60335.<br />
TM02 0792 0101<br />
NC C NO<br />
0/4-20 mA 0-10 V<br />
Group 2<br />
STOP<br />
RUN<br />
10K<br />
Fig. 49 Connection terminals<br />
N PE L<br />
6 5 4 3 2<br />
Group 3<br />
1: Digital input 2<br />
9: GND (frame)<br />
8: +24 V<br />
7: Sensor input<br />
6: GND (frame)<br />
5: +10 V<br />
4: Setpoint input<br />
3: GND (frame)<br />
2: Start/stop<br />
Group 1<br />
TM05 2984 0812<br />
Single-phase MLE motors<br />
45