Other Technical Data; Sound Pressure Level - Grundfos CRE Series Installation And Operating Instructions Manual

Analog output (AO)
Current sourcing capability only.
Voltage signal:
• Range: 0-10 VDC.
• Minimum load between AO and GND: 1 kΩ.
• Short-circuit protection: Yes.
Current signal:
• Ranges: 0-20 and 4-20 mADC.
Maximum load between AO and GND: 500 Ω.
•
• Open-circuit protection: Yes.
Tolerance: - 0/+ 4 % of full scale (max-point coverage).
Screened cable: 28-16 AWG / 0.5 - 1.5 mm
Maximum cable length: 1640 ft.
Pt100/1000 inputs (PT)
Temperature range:
Minimum -30 °C (88 Ω/882 Ω).
•
Maximum +180 °C (168 Ω/1685 Ω).
•
Measurement tolerance: ± 2.5 °F.
Measurement resolution: < 0.5 °F.
Automatic range detection (Pt100 or Pt1000): Yes.
Sensor fault alarm: Yes.
Screened cable: 28-16 AWG / 0.5 - 1.5 mm
Use Pt100 for short wires.
Use Pt1000 for long wires.
LiqTec sensor inputs
Use Grundfos LiqTec sensor only.
Screened cable: 28-16 AWG / 0.5 - 1.5 mm
Grundfos Digital Sensor input and output (GDS)
Use Grundfos Digital Sensor only.
Power supplies (+5 V, +24 V)
+5 V:
• Output voltage: 5 VDC - 5 %/+ 5 %.
• Maximum current: 50 mADC (sourcing only).
• Overload protection: Yes.
+24 V:
• Output voltage: 24 VDC - 5 %/+ 5 %.
• Maximum current: 60 mADC (sourcing only).
• Overload protection: Yes.
Digital outputs (relays)
Potential-free changeover contacts.
Minimum contact load when in use: 5 VDC, 10 mA.
Screened cable: 28-12 AWG / 0.5 - 2.5 mm
Maximum cable length: 1640 ft.
Bus input
Grundfos GENIbus protocol, RS-485.
Screened 3-core cable: 28-16 AWG / 0.5 - 1.5 mm
Maximum cable length: 1640 ft.

20. Other technical data

EMC (electromagnetic compatibility)
EN 61800-3.
Residential areas, unlimited distribution, corresponding to CISPR
11, class B, group 1.
Industrial areas, unlimited distribution, corresponding to CISPR
11, class A, group 1.
Contact Grundfos for further information.
Enclosure class
Standard: IP55 (IEC 34-5).
Optional: IP66 (IEC 34-5).
2
.
Insulation class
F (IEC 85).
Torques
Terminal
L1, L2, L3, L, N
NC, C1, C2, NO
1 to 26 and A, Y, B
2

20.1 Sound pressure level

.
Motor
[kW]
2
.
0.25 to
2
.
2
.
The grey fields indicate that the motor is not yet available in this
MLE motor range, but is available in the previous MLE motor
range.
Thread size
M4
M2.5
M2
Max. speed
stated on Speed
-1
nameplate [min
-1
[min ]
1500
2000
2000
3000
4000
0.75
4000
4000
5900
5900
1500
2000
2000
3000
1.1 4000
4000
4000
5900
5900
1500
2000
2000
3000
1.5 4000
4000
4000
5900
5900
1500
2000
2000
3000
2.2 4000
4000
4000
5900
5900
Max. torque
[lb. ft]
1.3
0.37
0.37
Sound pressure level
ISO 3743
[dB(A)]
]
1-phase 3-phase
motors motors
38 38
42 42
53 53
58 58
58 58
68 68
38
42
53 53
58 58
58 58
68 68
57 57
64 64
58 58
68 68
57
64
58
68
39