Grundfos MGE Series User Manual

English (GB)
59
24. Inputs and outputs
Earth reference
All voltages refer to earth. All currents return to
earth.
Absolute maximum voltage and current limits
Exceeding the following electrical limits may result in
severely reduced operating reliability and motor life:
Relay 1:
Maximum contact load: 250 VAC, 2 A or 30 VDC, 2
A.
Relay 2:
Maximum contact load: 30 VDC, 2 A.
GENI terminals: -5.5 - 9.0 VDC or less than 25
mADC.
Other input/output terminals: -0.5 - 26 VDC or less
than 15 mADC.
Digital inputs
Internal pull-up current > 10 mA at V
i
= 0 VDC.
Internal pull-up to 5 VDC (currentless for V
i
> 5
VDC).
Certain low logic level: V
i
less than 1.5 VDC.
Certain high logic level: V
i
greater than 3.0 VDC.
Hysteresis: No.
Screened cable: 0.5 - 1.5 mm
2
/ 28-16 AWG.
Maximum cable length: 500 m.
Open-collector digital outputs (OC)
Current sinking capability: 75 mADC, no current
sourcing.
Load types: Resistive or/and inductive.
Low-state output voltage at 75 mADC: Maximum 1.2
VDC.
Low-state output voltage at 10 mADC: Maximum 0.6
VDC.
Overcurrent protection: Yes.
Screened cable: 0.5 - 1.5 mm
2
/ 28-16 AWG.
Maximum cable length: 500 m.
Analog inputs (AI)
Voltage signal ranges:
• 0.5 - 3.5 VDC, AL AU.
• 0-5 VDC, AU.
• 0-10 VDC, AU.
Voltage signal: R
i
greater than 100 kΩ at 25 °C.
Leak currents may occur at high operating
temperatures. Keep the source impedance low.
Current signal ranges:
• 0-20 mADC, AU.
• 4-20 mADC, AL AU.
Current signal: R
i
= 292 Ω.
Current overload protection: Yes. Change to voltage
signal.
Measurement tolerance: - 0/+ 3 % of full scale
(maximum-point coverage).
Screened cable: 0.5 - 1.5 mm
2
/ 28-16 AWG.
Maximum cable length: 500 m, excluding
potentiometer.
Potentiometer connected to +5 V, GND, any AI:
Use maximum 10 kΩ.
Maximum cable length: 100 m.
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 (maximum-point
coverage).
Screened cable: 0.5 - 1.5 mm
2
/ 28-16 AWG.
Maximum cable length: 500 m.

Grundfos MGE Series Specifications

General

Brand	Grundfos
Model	MGE Series
Category	Engine
Language	English