M10I Router Redundant Power Supplies - Juniper JUNOS - NETWORK OPERATION GUIDE REV1 Network Operation Manual

JUNOS Internet Software Network Operations Guide: Hardware

M10i Router Redundant Power Supplies

Figure 201: M10i Router Redundant Power Supplies
M10i router rear
FAN TRA Y
1
PEM3
PEM2
!
510
Understanding Redundant Power Supplies
The M10i router uses either AC or DC power. You can install up to four load-sharing
power supplies at the bottom rear of the chassis. Figure 201 shows the M10i router
power supplies and where they are installed in the chassis.
The AC power supplies are fully redundant. If one power supply fails or is removed,
the remaining power supplies instantly assume the entire electrical load. Two power
supplies can provide full power for as long as the router is operational. Three power
supplies are required for redundancy. Power supplies must be present in slots P/S 0
and P/S 1 for the router to operate.
The DC power supplies are fully redundant. The DC power supplies in slots P/S 0
and P/S 1 can provide full power to the router. Likewise, the DC power supplies in
slots P/S 2 and P/S 3 can also provide full power. The DC power supplies in slots
P/S 2 and P/S 3 jointly serve as the backup to the DC power supplies in slots P/S 0
and P/S 1 . Power supplies must be present in slots P/S 0 and P/S 1 for the router
to operate.
Power supplies
C-FE B 0
C-FE B 1
P/S 3
P/S 1
P/S 2
P/S 0
NOT E:
P/S 0 AND FAN TRA Y
P/S 1 MUS O
T BE PRE
FOR NOR
MAL OPE SEN T
RAT ION .
PEM1
PEM0
NOTE: AC and DC power supplies are required in slots P/S 0 and P/S 1 for the
router to operate.
The DC power supplies in slots P/S 0 and P/S 1 must be powered by dedicated
power feeds derived from feed A, and the DC power supplies in slots P/S 2 and
must be powered by dedicated power feeds derived from feed B. This
P/S 3
configuration provides the commonly deployed A/B feed redundancy for the
system.
AC power supply
DC power supply