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Appendix 1 Expanding Power Inputs
During expanding and routing new external power cables, ensure that at least one power supply (active power
or standby power) input to the subrack is normal according to the preceding operation. Therefore, the existing
subracks are working normally.
If new equipment is not configured with sufficient external power inputs according to the standard
configurations of a cabinet, Instead, if it is configured with external power inputs according to the number of
actually configured subracks and is not configured with external power cables for subsequent expansion in
advance, you need to refer to this operation guide during increasing the number of subracks.
This appendix takes TN81PDU for example, introduce the expansion of two power supplies to four power
supplies. You can refer to this example during expansion of four power supplies to eight power supplies, but
short-circuit copper bars are not needed.
Route the required external power cables during subrack expansion from the PDU to the power distribution
1
cabinet and stick a temporary label onto each cable.
Area A is powered off, and remove
2
the protection cap in Area A..
B
A
4
Install short-circuit copper bars and
blue (-) power cables.
3
Install short-circuit copper bars and black (+) power cables.
B
A
Install the protection cap and power on Area A. For the
5
installation method of Area B, see that of Area A.
B
A
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B
A
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