OLT6 and 1134 Description Installation and Turnup Guide
Page 26 of 50
1.4.4. DC Power Installation
Use the following procedure to install 48VDC:
1. This procedure should
ONLY
be used for
48V DC installations
of the shelf. This
procedure should be skipped for shelves using 120/240VAC shelves.
2. Insert the shelf into the desired position and push it straight back until the
mounting brackets are flush against the mounting rails.
3. The shelf is secured with four #12-24 screws. First insert the two upper mounting
screws. Do not tighten the mounting screws until the lower two screws have been
added as some amount of play is needed to align all the holes.
4. Insert the two remaining screws into the bottom mounting holes and tighten as
required. Tighten the two upper mounting screws to ensure the shelf is secure.
5. Locate the Tellabs® OLT6 power cable (which contains –48V A and B Feeds,
Returns, and Digital Grounds). Typically, the -48V A and B should be fed from
different circuits with different inputs and circuit breakers to ensure the system
continues running even if a single feed fails. The digital ground should NEVER
be connected to the -48V power supply return as this will introduce noise and
safety concerns for the product. The digital ground should be connected to the
rack earth ground.
6. Remove the Tellabs® shelf cover if it is is currently in place.
7. Connect P4 to the Tellabs® OLT6 input power connector.
