E-Pump Electrical Connections - Grundfos CRE Serie Notice D'installation Et De Fonctionnement

Group 2: Output (relay signal, terminals NC, C, NO)
The output (group 2) is galvanically separated from other circuits.
Therefore, the supply voltage or protective extra-low voltage can
be connected to the output as desired.
Group 3: Power supply (terminals L1, L2, L3)
Connection terminals
Fig. 6
A galvanic separation must fulfill the requirements for reinforced
insulation including creepage distances and clearances specified
in EN 61800-5-1.
20: PT 100 B
19: PT 100 B
18: PT 100 A
17: PT 100 A
16: GND (frame)
15: +24 V
14: Sensor input 2
13: GND
12: Analog output
11: Digital input 4
10: Digital input 3
1: Digital input 2
9: GND (frame)
8: +24 V
7: Sensor input
B: RS-485B
Y: Screen
A: RS-485A
6: GND (frame)
5: +10 V
4: Setpoint input
3: GND (frame)
2: Start/stop
3.4.10 Signal cables
• Use screened cables with a conductor cross-section of min.
28 AWG and max. 16 AWG for external on/off switch, digital
input, setpoint and sensor signals.
• Connect the screens of the cables to frame at both ends with
good frame connection. The screens must be as close as
possible to the terminals. See fig. 7.
Stripped cable with screen and wire connection
Fig. 7
• Always tighten screws for frame connections whether a cable
is fitted or not.
• Make the wires in the pump terminal box as short as possible.

3.5 E-pump electrical connections

3.5.1 Connection of E-pump to Danfoss pressure sensor
MBS3000
The blue wire of the pressure sensor is connected to the #7
terminal of the E-pump. The brown wire of the pressure sensor is
connected to the #8 terminal of the E-pump.
See section 3.4.10 Signal cables for additional details.
Danfoss pressure sensor
Fig. 8
9