Connection Diagram; Connection To External Controllers; Input/Output Communication - Grundfos MAGNA3 Montage- Und Betriebsanleitung

4.3 Connection diagram

ELCB
Fig. 9 Example of typical connection, 1 x 230 V ± 10 %, 50/60 Hz

4.4 Connection to external controllers

Fig. 10 Connection diagram
Warning
Wires connected to supply terminals, outputs
NC, NO, C and start/stop input must be separated
from each other and from the supply by
reinforced insulation.
Concerning demands on signal wires and signal transmitters,
see section 18. Technical data.
Use screened cables for external on/off switch, digital input,
sensor and setpoint signals.
All cables used must be heat-resistant up to
+85 °C.
Note
All cables used must be installed in accordance
with EN 60204-1 and EN 50174-2:2000.

4.5 Input/output communication

• Relay outputs
Alarm, ready and operating indication via signal relay.
• Digital input
– Start/Stop (S/S)
– Min. curve (MI)
– Max. curve (MA).
• Analog input
0-10 V or 4-20 mA control signal.
To be used for external control of the pump or as sensor input
for the control of the external setpoint.
The 24 V supply from pump to sensor is optional and is
normally used when an external supply is not available.
External switch
Fuse
(min. 10 A, time lag)
3
Max.
24 V DC
24V
N
22 mA
Vcc
Signal
0-10 V DC
Vcc
Signal
4-20 mA
2
M
M
S/S
A
Max.
250 V AC
2 A AC1
Min.
5 V DC
20 mA
NC NO C
1
17