Grundfos CRE Series - Page 86

• 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: +/- 4 % of full scale.
Screened cable: 0.5 - 1.5 mm
2
/ 28-16 AWG.
Maximum cable length: 500 m.
Pt100 or Pt1000 inputs (Pt)
Temperature range:
• Minimum -50 °C (80 Ω/803 Ω).
• Maximum 204 °C (177 Ω/1773 Ω).
Measurement tolerance: +/- 1.5 °C.
Measurement resolution: less than 0.3 °C.
Automatic range detection (Pt100 or Pt1000): Yes.
Sensor fault alarm: Yes.
Screened cable: 0.5 - 1.5 mm
2
/ 28-16 AWG.
Use Pt100 for short wires.
Use Pt1000 for long wires.
LiqTec sensor inputs
Use a Grundfos LiqTec sensor only.
Screened cable: 0.5 - 1.5 mm
2
/ 28-16 AWG.
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 % to +5 %
• Maximum current: 60 mADC, sourcing only
• Overload protection: Yes.
+24 V
• Output voltage: 24 VDC -5 % to +5 %
• Maximum current: 200 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: 0.5 - 2.5 mm
2
/ 28-12 AWG.
Maximum cable length: 500 m.
Bus input
Grundfos GENIbus protocol, RS-485.
Grundfos Modbus protocol, RS-485.
Screened 3-core cable: 0.5 - 1.5 mm
2
/ 28-16 AWG.
Maximum cable length: 500 m.
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English (GB)