Grundfos IO 50 SQFlex Installation And Operating Instructions Manual page 7

Explanation
The jumpers are necessary in order to meet the demands of the circuit
breaker due to the complexity of handling DC currents. This means that
contact sets in series connection are required.
Warning
Never make any connections in the IO 50 unless the power
supply has been disconnected. The IO 50 must be connected
in accordance with the rules and standards in force for the
application in question.
Use appropriate compression fittings to ensure watertight
cable entries.
The IO 50 must be earthed.
The DC supply voltage is stated on the nameplate. Make sure that the IO 50
is suitable for the power supply on which it will be used.
3. Technical data
System voltages
• DC: Maximum 300 V, PE.
• AC: Maximum 254 V, 50/60 Hz, PE.
All four relay contacts must be used to meet the rated DC
Note
voltage. See the wiring diagrams on page 20.
Maximum current
8.4 A.
Ambient temperature
T : -30 °C to 50 °C.
amb.
Enclosure class
IP55 or NEMA 3R.
4. Disposal
This product or parts of it must be disposed of in an environmentally sound
way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company or service
workshop.
Subject to alterations.
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