Juniper PTX5000 Hardware Manual page 204

Table 70: Power Zone 2 Fault Tolerance
Number of FPCs Nonredundant Configuration
Up to four FPCs One PSM2 or PSM3 in either
PDU can provide
The PSMs must
nonredundant power.
be in different
PDUs for full PSM2 and PSM3 in the same
power PDU are nonredundant.
redundancy.
Five to eight Two PSMs, one in each PDU
FPCs can provide nonredundant
power.
PSM2 and PSM3 in the same
PDU is nonredundant.
CAUTION: Three PSMs
are nonredundant.
SEE ALSO
PTX5000 Hardware Component Overview | 7
PTX5000 AC Power Distribution Unit LEDs | 58
PTX5000 DC Power Distribution Unit LEDs | 99
PTX5000 AC Power Supply Module LEDs | 70
PTX5000 DC Power Supply Module LEDs | 105
Redundant Configuration
PDU0
Two PSMs in this zone are
required for full power
redundancy.
One PSM2 or PSM3 must be
installed in PDU0 and fully
functional.
If PSM2 or PSM3 in PDU0 is
powered off or fails, the
configuration becomes
nonredundant.
All four PSMs in this zone
are required for full power
redundancy.
PSM2 and PSM3 in PDU0
must be present and fully
functional.
If PSM2 or PSM3 in PDU0 is
powered off or fails, the
configuration becomes
nonredundant.
If all four PSMs in this zone fail, all FPCs are powered off.
PDU1
Two PSMs in this zone are
required for full power
redundancy.
One PSM2 or PSM3 must be
installed in PDU1 and fully
functional.
If PSM2 or PSM3 in PDU1 is
powered off or fails, the
configuration becomes
nonredundant.
All four PSMs in this zone
are required for full power
redundancy.
PSM2 and PSM3 in PDU1
must also be present and
fully functional.
If PSM2 or PSM3 in PDU0 is
powered off or fails, the
configuration becomes
nonredundant.
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