Connecting
4.8 Adjusting the fan voltage (FSGX)
Power Module PM240
Hardware Installation Manual, 07/2009, A5E00807525B AD
47
4.8 Adjusting the fan voltage (FSGX)
Fine-tuning the supply voltage of the fan
The power supply for the device fan (1 AC 230 V) in the Power Module is generated from the
line supply using a transformer.
The transformer is fitted with primary taps so that it can be fine-tuned to the supply voltage.
When delivered, the taps are always set to the highest level. With a low supply voltage, the
appropriate transformer tap must be activated.
99 99
Figure 4-5 Setting terminals for the fan transformer PM240 FSGX
The setting terminals must be connected to "0" and the supply voltage.
The supply voltage assignments for making the appropriate setting on the fan transformer
are indicated in the following tables.
Table 4- 6 Supply voltage assignments for setting the fan transformer
Supply voltage Fan transformer tap
380 V ± 10% 380 V
400 V ± 10% 400 V
440 V ± 10% 440 V
480 V ± 10% 480 V
NOTICE
If the terminals are not reconnected to the actual supply voltage:
• The required cooling capacity cannot be provided because the fan rotates too slowly;
• The fan fuses may blow due to an overcurrent.
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