Juniper CBL-M40-PWR-AU ユーザーズマニュアル
Power System Requirements and Specifications
M40 Internet Router Hardware Guide
48
For complete instructions, see “Connect Power to a DC-Powered Router” on page 123.
System Power Requirements
Table 14 lists the power requirements for the individual hardware components. The values in
this table are listed under typical voltage conditions. The power requirements are the same
for both the DC and AC power supplies.
this table are listed under typical voltage conditions. The power requirements are the same
for both the DC and AC power supplies.
Table 14: System Power Requirements
The numbers listed in Table 14 are fairly accurate for larger, typical configurations. When the
total power consumption is calculated to be less than 600 watts, you should increase the
number by 10 percent because the efficiency of the power supply is lower when supplying
less current. The 10 percent reduction at lower power levels is an approximation. The actual
reduction in efficiency is nonlinear and depends on the particular mix of PICs.
total power consumption is calculated to be less than 600 watts, you should increase the
number by 10 percent because the efficiency of the power supply is lower when supplying
less current. The 10 percent reduction at lower power levels is an approximation. The actual
reduction in efficiency is nonlinear and depends on the particular mix of PICs.
Do not substitute a metric nut driver or wrench for the
7/16-in. nut driver or wrench needed to tighten and loosen
the nuts on the terminal studs. A tool that does not fit the
nuts exactly can damage them. If a 7/16-in. tool is not
available, use pliers or an adjustable wrench.
7/16-in. nut driver or wrench needed to tighten and loosen
the nuts on the terminal studs. A tool that does not fit the
nuts exactly can damage them. If a 7/16-in. tool is not
available, use pliers or an adjustable wrench.
Component
Power (Watts)
Base system (all items except the FPCs and PICs, with the fans running in normal
mode
mode
287
(approximate)
(approximate)
Fans at full speed (additional power consumed when all the fans are running at their
maximum)
maximum)
144
(approximate)
(approximate)
FPC
23.7
Because of variation in components, temperature, and
supply voltage, we recommend you provision at least 35A
@ 48V DC for a DC-powered router, or 8A @ 208V AC for
an AC-powered router. This allows you to operate the
router in any configuration without upgrading the power
infrastructure.
supply voltage, we recommend you provision at least 35A
@ 48V DC for a DC-powered router, or 8A @ 208V AC for
an AC-powered router. This allows you to operate the
router in any configuration without upgrading the power
infrastructure.