Procedure; Follow-Up Procedures - ADTRAN MX2820 System Manual

MX2820 System Manual
To prevent electrical shock, do not install equipment in a wet loca-
tion or during a lightning storm.
Electronic modules can be damaged by static electrical discharge.
Before handling modules, wear an antistatic discharge wrist strap
to prevent damage to electronic components. Place modules in
antistatic packing material when transporting or storing. When
working on modules, always place them on an approved antistatic
mat that is electrically grounded.

PROCEDURE

1. Measure and pre-cut wire.
Determine and cut the length of wire necessary to reach from the RS-485 wire-wrap post
in the first shelf in the chain to the RS-485 wire-wrap post in the second shelf. Allow for
stripping the ends of the wire, routing the wires out of the shelf, and tying down in
accordance with CO Standard Operating Procedures (SOP).
2. Make wire-wrap connections to the host shelf.
Use the wire-wrap tool to connect the shielded, twisted-pair interconnect wire to the RS-
485 wire-wrap post on the MX2820 backplane. Connect the two conductors to the positive
and negative terminals, and connect the shield wire or drain wire to the ground post.
3. Make wire-wrap connections to the next shelf.
Run the interconnect wire to the backplane of the next shelf in the chain. Use the wire-
wrap tool to connect the two conductors of the interconnect wire to the RS-485 wire-wrap
post on the backplane of the client shelf. Wire the two conductors to the positive and
negative terminals, and wire the ground or shielded wire to the ground post. Be sure to
connect the positive terminals of each shelf together and the negative terminals of each
shelf together. Do not cross the polarities. The drain wire should be connected at only one
end of the ground post, but not both.
4. Connect any additional shelves.
If there are more shelves to be connected, repeat
the chain. Disregard the designation of host and client for the additional shelves. Each
shelf after the first one is a client shelf on the daisy chain.

FOLLOW-UP PROCEDURES

Once this procedure is complete, return to the procedure which called out this DLP and
continue with the tasks indicated.
7-74
WARNING
CAUTION
steps 1 - 3 for each shelf to be added to
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