The Dc Power Supply And Fan Unit Cabling Scheme - Dual-Level Redundancy; The Dc Power Supply Connector - Pin Positions; The Dc Power Supply Connector - Pin Descriptions - IBM DS4000 EXP810 Installation, User's, And Maintenance Manual

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Figure 40. The dc power supply and fan unit cabling scheme - dual-level redundancy
Complete the following steps to connect the dc power supply cable:
1. Using the supplied strap, tie the power supply cord to the rail to provide strain
relief for the power cord.
2. Connect the dc power cable to the power supply. See Figure 41 for the dc
power supply connector PIN positions.
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Figure 41. The dc power supply connector - PIN positions
Table 29. The dc power supply connector - PIN descriptions
Number Description
1 Pin 1: -48 V dc
2 Pin 2: POS RTN
3 Pin 3: GND
3. Connect the - 48V line of the dc power cable to an approved and rated
disconnect device. The disconnect device must be easily accessible from the
back of the EXP810 storage expansion enclosure.
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Chapter 3. Cabling the EXP810
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