Fujitsu BX900 S1 User Manual

130

Operating Manual

 BX900 S1

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If a power supply unit fails in a non-redundant configuration of power 
supply units, and the remaining power supply units do not provide 
sufficient power, the system unit is shut down immediately.

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Make sure that the individual power supply units are connected to 
different phases. This ensures additional phase redundancy for high 
availability configurations. If only one phase fails, the power supply units 
connected to the other phases remain operational. You can achieve full 
phase redundancy with three power supply units. If more power supply 
units are installed, up to two power supply units must be connected to 
each individual phase (for information on the electrical connections, see 
the technical manual for the PRIMECENTER rack). 

Phase redundancy is possible in regions where the single phase 
provides 200 - 240V; in other regions with lower single-phase voltage, 
two phases have to be coupled, which means that full phase redundancy 
is not possible.

3  +  1

1

5

4

4

4

3

2

3  +  1

2

5

4

4

4

3

2

3 + 3

0

5

4

4

4

3

2

4 + 0

0

8

7

6

7

6

3

4  +  0

1

8

7

6

7

6

3

4  +  0

2

8

7

6

7

6

3

4 + 1

0

8

7

6

7

6

3

4  +  1

1

8

7

6

7

6

3

5 + 0

0

12

10

8

10

8

4

5 + 0

1

12

10

8

10

8

4

5 + 1

0

12

10

8

10

8

4

6 + 0

0

15

12

10

13

10

5

Table 6: Fitting rules for Standard PSUs (Japan Version) connected to 100 ... 120 VAC