H3C CR19000-16, Руководство по установке

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10-10
Table10-4 Information on labels affixed to DC power cords
Content Meaning
MN(BC)-–48Vn
•
Loaded cabinet side —Only MN is used to identify the cabinet number (row
number and column number in the equipment room).
•
Power cabinet side —MN identifies the row and column number of the power
distribution equipment like the control cabinet and distribution box. 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). RTN and PGND have no row and column number for
identification.
•
n —Power port number in down-top and left-right order, in the range of 1 to 3.
MN(BC)-RTN
MN(BC)-PGND
The label only carries location information about the peer equipment, control cabinet, or distribution
box, while the information of the local end is not necessary.
Table10-4 lists the information of two –
48 V power supplies on the label. The information for other DC voltages (such as 24 V, 60 V) must be
given in similar methods.
Make sure labels are affixed in the correct direction. After the cable ties are bundled onto the cable,
the identification plates with the labels must face up, and the text on the labels in the same cabinet
must be in the same direction, as shown in
Figure10-12 .
Figure10-12 Example of labels on a DC power cord
•
A01/B08––48V2 (loaded cabinet side) —The cable is –48V2 DC supply, which is from the 8
th
connecter on the second row of –48V bus bar in the cabinet on Row A, and Column 1 in the
equipment room.
•
B03––48V2 (distribution box side) —The cable is –48V2 DC supply, which is from the loaded
cabinet on Row B, Column 03 in the equipment room.
In the power distribution box (or the first power cabinet of a row in the transmission equipment room),
every endpoint block on the –48V 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 endpoint
block.
PGND and RTN are two copper bars, on which the endpoint blocks are short-circuited, so which
endpoint is connected makes no difference. You only need to give the row and column numbers of
the power distribution box, instead of giving the specific serial number of the endpoint block on the
copper bar. For example, if the label on the loaded cabinet side is "A01-RTN", it means that the
power cord is an RTN that connects RTN copper bar in the power distribution box on Row A, Column
01 in the equipment room. Information on the labels for PGND cables must be given in the similar
way.
TO:
A01 -48V2
B08
TO:
B03 -48V2