Juniper CBL-M40-PWR-AU10 ユーザーズマニュアル
Replace a DC Power Supply
M40 Internet Router Hardware Guide
146
12. Slide the power cable lugs onto the terminal studs on the power supply faceplate (see
Connect the positive (+) source cable lug to the return terminal, which is labeled
RTN
.
Connect the negative (–) source cable lug to the input terminal, which is labeled
–48V
.
Run the power cables to the left on the left power supply, and to the right on the right
power supply. This arrangement enables you to replace a power supply without having
to detach the cables from the other power supply.
power supply. This arrangement enables you to replace a power supply without having
to detach the cables from the other power supply.
Figure 61: Attach Cables to a DC Power Supply
13. Secure the cable lug to the terminal studs, first with locking washers, then nuts. Using a
7/16-in. nut driver or wrench, tighten the nuts.
14. Verify that the power cabling from the source DC breaker to the power supply is correct.
There is no standard color coding for DC power cables. The
color coding used by the external DC power source at your
site determines the color coding for the leads on the power
cables that attach to the circuit breaker box. You must
ensure that the connections at the circuit breaker box
maintain the proper polarity. The power source DC cables
might be labeled
color coding used by the external DC power source at your
site determines the color coding for the leads on the power
cables that attach to the circuit breaker box. You must
ensure that the connections at the circuit breaker box
maintain the proper polarity. The power source DC cables
might be labeled
(+)
and
(–)
to indicate their polarity.
.
1131
Grounding studs
Terminal studs
Input
Return
Cable lug
Locking
washers
washers
Nuts
Do not substitute a metric nut driver or wrench. 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.
does not fit the nuts exactly can damage them. If a 7/16-in.
tool is not available, use pliers or an adjustable wrench.