communication of the units switched in parallel takes place via the 25-pin parallel operation cable(s) included in the scope of delivery.

For this purpose, first remove the parallel port covers (no. 5, p. 26/27) and connect the UPS units with each other with one parallel operation cable each. Use one parallel operation cable for 2 units and two parallel operation cables for 3 units (do not create a ring structure!).

(Communicative) parallel operating connection

... for 2 units:

... for 3 units:

After connecting the parallel operation cables, fasten the previously removed parallel port covers. Turn these by 180° so that the slot of the cover is facing downwards.

The hardware-related installation is now complete.

9.3Operation of the UPS in a parallel system

The start-up process is uncomplicated, does not require any prior knowledge and is basically oriented to the procedure described in chapter 6. If you have obtained the parallel operation board from AEG Power Solutions, you can find further special instructions there. The displays in the parallel system function the same way as described for the individual UPS units in chapter 8.

9.3.1Start-Up

1.Make sure that all connections have been made according to the installation instructions.

2.Make sure that all loads are switched off.

3.Make sure that all “maintenance switch” manual bypass switches (no. 3, p. 26/27) on the back of

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