Grundfos Hydro Multi-E Series Installation And Operating Instructions Manual page 42

Digital inputs (DI)
The internal pull-up current is above 10 mA when the initial
voltage (Vi) is equal to 0 VDC.
The internal pull-up current is zero when the initial voltage (Vi) is
greater than 5 VDC.
Certain logical low: Vi below 1.5 VDC.
Certain logical high: Vi over 3.0 VDC.
Hysteresis: No.
Screened cable: 28-16 AWG (0.5 - 1.5 mm
Maximum cable length: 1640 ft (500 m).
Open-collector digital outputs (OC)
Current sinking capability: 75 mADC, no current sourcing.
Load types: Resistive and/or inductive.
Low-state output voltage at 75 mADC: Max. 1.2 VDC.
Low-state output voltage at 10 mADC: Max. 0.6 VDC.
Overcurrent protection: Yes.
Screened cable: 28-16 AWG (0.5 - 1.5 mm
Maximum cable length: 1640 ft (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: Ri is greater than 100 kΩ at 77 °F (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: Ri is equal to 292 Ω.
Current overload protection: Yes. Change to voltage signal.
Measurement tolerance: - 0/+ 3 % of full scale (maximum-point
coverage).
Screened cable: 28-16 AWG (0.5 - 1.5 mm
Maximum cable length: 500 m (exclusive of potentiometer).
Potentiometer connected to +5 V, GND, any AI:
Use maximum 10 kΩ.
Maximum cable length: 328 ft (100 m).
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Analog output (AO)
Current sourcing capability only.
Voltage signal:
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Current signal:
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Tolerance: - 0/+ 4 % of full scale (max-point coverage).
Screened cable: 28-16 AWG (0.5 - 1.5 mm
Maximum cable length: 1640 ft (500 m).
Pt100/1000 inputs (PT)
Temperature range:
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Measurement tolerance: ± 34.7 °F (1.5 °C).
Measurement resolution: Less than 32.54 °F (0.3 °C).
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:
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+24 V:
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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 (500 m).
Bus input
Grundfos GENIbus protocol, RS-485.
Screened 3-core cable: 28-16 AWG (0.5 - 1.5 mm
Maximum cable length: 1640 ft (500 m).
Range: 0-10 VDC.
Minimum load between AO and GND: 1 kΩ.
Short-circuit protection: Yes.
Ranges: 0-20 and 4-20 mADC.
Maximum load between AO and GND: 500 Ω.
Open-circuit protection: Yes.
Minimum -22 °F (-30 °C) (88/882 Ω).
Maximum 356 °F (180 °C) (168/1685 Ω).
Output voltage: 5 VDC ± 5 %.
Maximum current: 50 mADC (sourcing only).
Overload protection: Yes.
Output voltage: 24 VDC - 5 %/+ 5 %.
Maximum current: 60 mADC (sourcing only).
Overload protection: Yes.
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