Electrical Considerations; Power Wiring And Fusing; Fan Module Power; Frame Ground - ADTRAN MX2820 System Manual

ELECTRICAL CONSIDERATIONS

The MX2820 shelf supports dual-feed –48 VDC or ±24 VDC power inputs.

Power Wiring and Fusing

MX2820 power connections, including return connections, should be provided from the fuse
panel using insulated wire and the appropriate fuse (see
cation requirements, power can be provided by a –48 VDC or ±24 VDC supply. A separate wire
should be run from the fuse panel for each –48 VDC or ±24 VDC input and for each VDC
return. Power wire with red insulation is recommended for the voltage feeds, and power wire
with black insulation is recommended for the return feeds.
Applications which include STS-1 multiplexers should be –48 VDC
only.

Fan Module Power

Refer to the appropriate Installation and Maintenance Practice and/or Job Aid for Fan instal-
lation.

Frame Ground

Each MX2820 shelf requires a connection to frame ground using the appropriate AWG wire
size. See Table 2-7 on page 2-6.

FOLLOW-UP PROCEDURES

Once the Central Office preparation described in this section of the manual is complete, the
MX2820 shelves are ready for the installation. "NTP-001,
the instructions for installing the shelves.
61186003L1-1D
Section 4, Site Preparation - Electrical Considerations
Table 2-7
NOTE
Shelf and SCU Installation"
on page 2-6). Per appli-
provides
4-3