IBM Partner Pavilion DS4100 manual Power cabling, Power cord locations

Power cabling

The DS4100 base storage server uses two standard power cords, and the single-controller storage server uses only one. You can connect the power cords to a primary power unit inside the rack cabinet, such as a properly grounded ac distribution unit, or to an external source, such as a properly grounded electrical outlet.

The DS4100 storage server does not ship with power cords. Refer to Appendix C, “Power cords,” on page 125 for the list of IBM-approved power cords for your region. Depending on your model, the DS4100 storage server does ship with one or two line jumper cords for connecting the DS4100 power supply or power supplies to an IBM-approved rack power distribution unit.

If you have not already done so, attach the power cords by using Figure 55 for the location of the component parts.

Lever

AC power	Strain-relief-	AC power
connector	clamp	switch

f10ug027

Figure 55. Power cord locations

Perform the following to cable the power cords:

1.Connect the power cord to the power supply.

2.Remove the nut that holds the power cable strain-relief clamp, and then remove the strain-relief clamp.

3.Wrap the strain-relief clamp around the power cord approximately 20 cm (8 in.) from the power supply connection end. Leave some slack between the clamp and the power-supply end of the power cord.

4.Replace the power cable strain-relief clamp, and tighten it securely with the nut.

5.Plug the power cord into a properly grounded electrical outlet.

Note: To maintain power redundancy, plug the storage server’s right and left power supplies into two independent external power circuits through ac distribution units inside a rack cabinet or directly into external receptacles. Similarly, the right and left power supplies of the DS4000 storage expansion units attached to the DS4100 should be plugged into the same two independent external power circuits as the DS4100.

It is recommended that you determine the maximum surge current possible when all devices in the power circuit are started at the same time. Based on the total number of devices on a power circuit, find the maximum (worst-case) specification value in order to prevent the circuit from tripping. When both power supplies are connected and the storage server is powered on, each power supply unit will handle approximately

Chapter 3. Cabling the storage server 61