Installation and Getting Started Guide for HP 600/610/620/630 RPS/EPS 2011-04

5-33
Installing and Connecting the HP Redundant / External Power Supplies
Recommended Connection Topologies
The cable connectors are keyed so they must connect an output to an input.
You cannot connect an input to an input. When HP 610 EPS units are
connected in this manner, the first unit in the string provides backup power
to all the other connected units.
The illustration above shows an example of five HP 610 EPS units connected
in a closed-loop configuration.
Recommendations
The recommended installation is to connect all of the HP 610 EPS units into
one ring. The more units there are in a ring, the more efficient the redundancy.
For example, with three units in a ring the maximum total load for redundancy
is 2/3 of the maximum available power. However, with five units in the ring,
the maximum total load is 4/5 of the maximum available power.
Limitations (Calculating the required number of HP 610 EPS
units)
The total PoE load on all HP 610 EPS units must be less than the total power
available from N-1 of the power supplies, where N is the number of connected
units. The load on each HP 610 EPS must be no greater than the maximum
allowable for a single unit (850 W).
Internal
Power
Status
Out
Ready
In
Ready
EPS Backup Power Ports
Internal
Power
Status
Out
Ready
In
Ready
EPS Backup Power Ports
Multiple power sources disconnect both the AC cord and EPS Backup power cables to completely remove power from the unit.
Line: 50/60
Hz
110
240 V~
11 6 A
Internal
Power
Status
Out
Ready
In
Ready
EPS Backup Power Ports
Internal
Power
Status
Out
Ready
In
Ready
EPS Backup Power Ports
Multiple power sources disconnect both the AC cord and EPS Backup power cables to completely remove power from the unit.
Line: 50/60
Hz
110
240 V~
11 6 A
Internal
Power
Status
Out
Ready
In
Ready
EPS Backup Power Ports
Internal
Power
Status
Out
Ready
In
Ready
EPS Backup Power Ports
Multiple power sources disconnect both the AC cord and EPS Backup power cables to completely remove power from the unit.
Line: 50/60
Hz
110
240 V~
11 6 A
Internal
Power
Status
Out
Ready
In
Ready
EPS Backup Power Ports
Internal
Power
Status
Out
Ready
In
Ready
EPS Backup Power Ports
Multiple power sources disconnect both the AC cord and EPS Backup power cables to completely remove power from the unit.
Line: 50/60
Hz
110
240 V~
11 6 A
Internal
Power
Status
Out
Ready
In
Ready
EPS Backup Power Ports
Internal
Power
Status
Out
Ready
In
Ready
EPS Backup Power Ports
Multiple power sources disconnect both the AC cord and EPS Backup power cables to completely remove power from the unit.
Line: 50/60
Hz
110
240 V~
11 6 A
HP 610 EPS units
connected in a ring
AC power
EPS Backup Power cables