Dc Cable Wire Color Coding; Dc Power Supply Input Requirements - IBM Storwize V5000 Gen2 Quick Installation Manual

Use the supplied cables to connect the DC PSUs to the power sources. Use only
the IBM supplied DC power cable (IBM part number 00AR087) to connect the unit
to a DC power source.
Each PSU cable must be protected by a 20A circuit breaker. These instructions
assume that the circuit breaker is separate from the DC power distribution unit.
Refer to the DC power distribution unit documentation and the circuit breaker
documentation for details. Follow the instructions that are given there for
connecting the circuit breaker to the power distribution unit and for connecting the
DC power cable to the circuit breaker.
One end of the cable ends in a plug that fits the DC PSU. At the other end of the
cable, each individual wire ends with a 6 mm diameter ring terminal that is
designed to fit an M6 stud. Provide adequate strain relief after you attach the ring
terminals to the power source. Table 9 lists the wire colors.
Table 9. DC cable wire color coding
Color
Blue
Green / Yellow
Brown
The DC power cable is 4 m long. Connect it to the DC power source before you
connect it to the PSU. The PSU does not have a power switch, so its outputs and
the enclosure become live as soon as power is connected.
The supplied power must meet the input requirements that are listed in Table 10.
Table 10. DC power supply input requirements
Requirement
Voltage (V DC)
Instantaneous (V DC for < 1 second)
Inrush current at initial turn on (-48V DC)
Out of spec time before power off is signaled
The connection to the DC power source must be made by trained service
personnel. Ensure that the connection is made in accordance with all the
requirements of the equipment that is being used.
The DC power cable must be totally contained in a single rack and must not
extend outside the rack to another rack.
If it is necessary to replace the ring terminals with a different connector, choose a
suitably sized and rated UL-listed connector that is appropriate for the wire gauge
and available current. Install the ring terminals according to the instructions
provided by the manufacturer.
Direct current power replaceable units
The DC power supply model has two replaceable units.
14
Storwize V5000 Gen2: Quick Installation Guide
Function
Return
Ground
-48V
Min
-48
-36
Max
-60
-75
34 A
5 ms