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Figure 42: Connecting the DC Cable
NOTE: To connect the DC source to an ACX7348 router, use a 6 AWG and 90 °C
temperature-rated stranded copper wire.
a. Secure the positive (+) DC source power cable lug to the RTN (return) terminal.
b. Secure the negative (–) DC source power cable lug to the –48V/-60V (input) terminal.
CAUTION: Ensure that each power cable lug seats flush against the surface of the
terminal block as you are tightening the nuts. Ensure that each nut is properly
threaded into the terminal. Applying installation torque to the nuts when
improperly threaded can result in damage to the terminal.
CAUTION: You must ensure that power connections maintain the proper polarity.
The power source cables might be labeled (+) and (–) to indicate their polarity.
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 terminal studs on each power supply.
8.
Place the terminal block cover on and tighten the screw. See
9.
Verify that the power cables are connected correctly, that they are not touching or blocking access
to router components, and that they do not drape where people could trip on them.
10. Repeat Step
4
through Step
9
for connecting the other PSM to power.
Figure 42 on page
86.
86
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