Fujitsu BX400 S1 用户手册

BX400 S1

Operating Manual

119

The BX400 S1 system unit has 4 bays for hot-plug power supply units (PSU 
1-4). The power supply units adapt automatically to any voltage within the range 
100 V - 127 V / 200 V - 240 V.

All bays for power supply units are fitted with flaps which close automatically. 
This ensures sufficient cooling of the system components when you replace a 
power supply unit or fan module during operation.

The PSU bays must be fitted according to their numbering. Unoccupied PSU 
bays must be fitted with fan modules to ensure that the system components are 
properly cooled, see 

Figure 42: Numbering of the power supply unit bays

In the minimum configuration, the BX400 S1 system unit contains one hot swap 
power supply unit (PSU1). This enables a fully populated BX400 S1 system unit 
to run in low power mode. Full power mode requires at least two PSUs in 200 
V environments or three PSUs in 100 V environments.

To provide a redundant power supply, a third or fourth power supply unit can be 
installed (PSU3 and PSU4) in 200 V environments. In 100 V environments a 
fourth power supply unit (PSU4) is required to provide a redundant power 
supply. If one of the four power supply units fails, the other two/three units will 
ensure the system unit continues to operate normally. The defective power 
supply unit can be replaced while the system unit is still running (hot swap).

PSU 1

PSU 2

PSU 3

PSU 4