Huawei S2700 Hardware Installation And Maintenance Manual page 177

S2700&S3700&S5700&S6700 Switch
Hardware Installation and Maintenance Guide
Content
MN(BC)-B-
PGND
The label only carries location information about the destination direction of the power cable
whereas information about the local end is unnecessary. That is, the label only carries location
information about the opposite equipment, the control cabinet, or the distribution box.
13-43
other DC voltages, such as 24 V and 60 V should be given in similar methods.
Make sure that labels are affixed in the correct direction. That is, after the cable ties are
bundled onto the cable, the identification plates with the labels should face up, and the text on
the labels in the same cabinet should be in the same direction. For details, see
Figure 13-93 Example of the labels for DC power cables
The meaning of the label in
l
l
PGND and BGND are two copper bars, on which the terminal blocks are short-circuited.
Therefore, it makes no difference which terminal is connected to them. It is only necessary to
give the row and column of the power distribution box, instead of giving the specific serial
number of the terminal block on the copper bar. For example, if the label on the loaded
Issue 13 (2017-11-20)
Meaning
On the power cabinet side, MN identifies the row and column number
of the power distribution equipment like a control cabinet and
distribution box, and BC identifies the row and column number of the
-48 V connector. If there is no row number or column number, or the
connector can be identified without them, BC can be omitted. It is
unnecessary to identify the row and column number for BGND and
PGND.
lists the information on two -48 V power supplies on the label. The information on
On the loaded cabinet side, the label "A01/B08--48V2" on the cable indicates that the
cable is -48 V DC supply, which is from the eighth connector in row B of -48 V bus bar
in the cabinet in row A, and column 1 in the equipment room.
On the distribution box side, the label "B03--48V2" indicates that the cable is -48 V DC
supply, connected to DC power socket 2 in row B, column 03 in the equipment room.
NOTE
In the power distribution box or the first power cabinet of a row in a transmission equipment room,
every terminal block on the -48 V connector bar has a numeric identification. For example, in the above
label of "A01/B08--48V2", "08" (or sometimes "8") is the numeric identification of the terminal block.
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Figure 13-93 is as follows:
13 Appendix
Table
Figure 13-93.
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