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26. Inputs and outputs
Ground reference, GND
All voltages refer to GND.
All currents return to GND.
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 to 9.0 VDC or less than 25 mADC.
Other input and output terminals: -0.5 to 26 VDC or less than 15
mADC.
Digital inputs, DI
Internal pull-up current greater than 10 mA at V
Internal pull-up to 5 VDC; currentless for V
Low logic level: V
less than 1.5 VDC.
i
High logic level: V
greater than 3.0 VDC.
i
Hysteresis: No.
2
Screened cable: 0.5 - 1.5 mm
, 28-16 AWG.
Maximum cable length: 1640 ft (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.
2
Screened cable: 0.5 - 1.5 mm
, 28-16 AWG.
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 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 equal to 292 Ω.
Current overload protection: Yes. Change to voltage signal.
Measurement tolerance: - 0/+ 3 % of full scale (maximum-point
coverage).
2
Screened cable: 0.5 - 1.5 mm
, 28-16 AWG.
Maximum cable length: 1640 ft (500 m), excl. 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:
•
•
•
Current signal:
•
•
•
Tolerance: - 0/+ 4 % of full scale (maximum-point coverage).
Screened cable: 0.5 - 1.5 mm
Maximum cable length: 1640 ft (500 m).
Pt100/1000 inputs, PT
Temperature range:
•
equal to 0 VDC.
i
•
greater than 5 VDC).
i
Measurement tolerance: ± 2.7 °F (1.5 °C).
Measurement resolution: < 0.54 °F (0.3 °C).
Automatic range detection, Pt100 or Pt1000: Yes.
Sensor fault alarm: Yes.
Screened cable: 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: 0.5 - 1.5 mm
Grundfos Digital Sensor input and output, GDS*
Use Grundfos Digital Sensor only.
* Not applicable for TPE, TPED pumps. The factory-fitted
Power supplies
+5 V:
•
•
•
+24 V:
•
•
•
Digital outputs, relays
Potential-free changeover contacts.
Minimum contact load when in use: 5 VDC, 10 mA.
Screened cable: 0.5 - 2.5 mm
Maximum cable length: 1640 ft (500 m).
Bus input
Grundfos GENIbus protocol, RS-485.
Screened 3-core cable: 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.
2
, 28-16 AWG.
Minimum -22 °F (-30 °C). 88 Ω/882 Ω.
Maximum 356 °F (180 °C). 168 Ω/1685 Ω.
2
, 28-16 AWG.
2
, 28-16 AWG.
differential-pressure sensor for TPE, TPED Series 2000 is
connected to this input.
Output voltage: 5 VDC - 5 %/+ 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.
2
, 28-12 AWG.
2
, 28-16 AWG.
57
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