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Electrical connections, Cleaning / repairing the unit – JULABO F38-EH Refrigerated and Heating Circulators User Manual

Page 29

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EH

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8. Electrical

connections

Notice:

Use shielded cables only.
The shield of the connecting cable is electrically connected to the plug housing.

/ Control output

The

connector may be used for control of JULABO refrigerated

circulators or as output for alarm messages.

1

3

2

4

5

Circuit:

Operation

= relay powered

Alarm

= relay not powered

Pin assignment:
Pin

Signal

1

+24 V (I max. current 25 mA)

2

0 V

3 Alarm

relay

4

Reserved - do not use!

5

Reserved - do not use!


9. Cleaning / repairing the unit

Caution:

 Always turn off the unit and disconnect the mains cable from the power

source before cleaning the unit.
Prevent humidity from entering into the circulator.

 Electrical connections and any other work must be performed by qualified

personnel only.

To maintain the full cooling performance, clean the condenser from
time to time.

 Switch off the unit, disconnect mains power cable.
 Hold the venting grid, pull out and remove.
 Clean the ribbed condenser with a vacuum cleaner.
 Replace the venting grid.
 Switch on the unit.