ADTRAN MX2820 System Manual page 280

MX2820 System Manual
a. Determine which fuse or circuit breaker pairs are to supply power and return to the
shelf.
b. Remove the fuses or turn off circuit breakers for the pair determined in the preceding
step.
c. Cut four lengths of wire to reach from the terminals on the fuse or circuit breaker pairs
to the power terminals on the shelf. Be sure to include enough length to allow for tying
the wire neatly to the frame as specified by CO Standard Operating Procedures (SOP).
Wire color should differentiate between –48/±24 VDC supply and the return, according
to CO SOP.
d. Use the crimping tool to connect an appropriate ring lug to each end of the wires.
e. Use a screwdriver appropriate for the fuse panel or circuit breakers, and a straight-slot
screwdriver for the MX2820 power terminals to connect the ends of one wire between
the "A" CO ±24/–48 VDC supply and the PWR A terminal on the Barrier Strip
connector. see
f. Use the other three wires to connect:
• "A" CO ±24/–48 VDC return to RET A
• "B" CO ±24/–48 VDC supply to PWR B
• "B" CO ±24/–48 VDC return to RET B
See Figure 7-2.
4. Fan Module power connection.
• This subsection applies to the MX2820 Fan Module.
• If utilizing a Pusher Fan, go to
• If not incorporating active cooling, go to
The Fan Module is powered by dual independent power supplies from the CO. The
MX2820 Fan Module comes with a one amp fuse mounted on the fan frame and draws
less than 200 milli-amps.
a. Determine which pair of fuses or circuit breakers are to supply power to the Fan
Module.
b. Remove the fuses or turn off circuit breakers from the A and B slots in the fuse panel or
circuit breaker panel determined in the preceding step.
c. Cut four lengths of appropriately-sized wire to reach from the terminals on the fuse
panel or circuit breaker panel to the power terminal strip on the Fan Module. Be sure to
include enough length to allow for tying the wire neatly to the frame as specified by CO
SOP. Wire color should differentiate between VDC supply and return according to CO
SOP.
d. Use a crimping tool to connect an appropriate ring lug to each end of the four wires.
e. For the MX2820 Fan Assembly, connect the power. Use a screwdriver appropriate for
the fuse panel or circuit breaker panel and a #1 phillips-head screwdriver for the Fan
Module terminals. Connect the Fan Module as follows:
• –48 VDC A CO supply to the –48 VDC A Fan Module terminal
• –48 VDC A CO return to the –48 VDC RET A Fan Module terminal
7-22
Figure 7-2.
step 5.
step 6.
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