1-4 Issue 1 November 1998
363-208-011, Appendix 1
NJ00675A-2 Dual Power Feed Unit Installation Procedure
I = This item may be ordered from Lucent Technologies-IMDARC by the
installer.
R = This item is required for installation of and is packaged with the DPFU.
Reference Documents
Reference Document List
Engineering Information
Engineering Notes
■ The unit is 2.0” high, 8.0” deep and mounts in a 23” frame. The mounting
brackets are removable and mount in two different positions to accommo-
date various mounting arrangements. For rear mounted, rear cabled COT
arrangement the brackets would be mounted in the rear mounting holes
(with bracket leg parallel to the side of the DPFU facing forward).
■ The unit is convection cooled and consequently no heat baffles or external
cooling is required.
■ The DPFU should be mounted at the top of the SLC-2000 frame for the
Central Office Terminals (J1C265B-1 and C-1). In addition, it is recom-
mended that for possible future change outs of the DPFU (hot swap) a
space of 2” be reserved directly below the unit. Connecting cables have
been designed to facilitate this eventuality.
■ The normal operation of the DPFU is to protect the A and B primaries feed-
ing the DPFU from the BDFB. That is, if one primary fails the other will
assume the full load and cause no failure of either secondary, each of
which powers a portion of the SLC-2000 frame. In a situation with a pri-
mary failed the Alarms LED representing that primary (A or B) will light and
remain lighted until the fault is corrected. On the other hand, if an abnormal
fault occurred, for example, such as a diode failure or a control board mal-
function and an Alarm LED lighted with all primary and secondary voltages
Document Number Description
NJ00675A-2 Dual Power Feed Unit (specification)
NS00675-02 Dual Power Feed Unit (circuit)
NT-00675-31 Dual Power Feed Unit (wiring diagram)
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