Dell M3S2G8, Hardware Description Manual

Page: 41 / 64

Chapter 5. UBox Components 5-7
5.2.6. UBox PSU Numbering
Rear view
Mark Description
I UBox PSU 0
J UBox PSU 1
K UBox PSU 2
L UBox PSU 3
There are up to four PSUs installed in a UBox, according to the voltage range
and the UBox model.
System
configuration
Voltage
range
Population rule Redundancy
Two UNB modules
100-110V
•
PSU 0
•
PSU 1
•
PSU 2 or 3
2+1 redundancy
200-240V
•
PSU 0
•
PSU 1
1+1 redundancy
Four UNB modules
100-110V
•
PSU 0
•
PSU 1
•
PSU 2
•
PSU 3
3+1 redundancy
200-240V
•
PSU 0
•
PSU 1
•
PSU 2 or 3
2+1 redundancy
Important Regardless of the system configuration, voltage range and
PSU redundancy, the UBox cannot function if both PSU
0
and PSU 1 are absent.