IBM DS4000 EXP810, Инструкция по установке, использованию и обслуживанию

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4. Complete the wiring from the disconnect device to the terminal marked -48V of
the Reliably grounded safety extra low voltage (SELV) dc power source.
Connect the POS RTN and ground lines of the dc power cable to the terminals
marked POS RTN and GND on the dc power source, as shown in Figure 42.
For maximum protection against power loss, connect each of the two dc power
supplies to a different power source.
2 3 1
4
5
exp81034
Figure 42. The dc wiring from EXP810 to disconnect device and dc power source
Table 30. The dc power source wiring descriptions
Number Description
1 Pin 1: -48 V DC
2 Pin 2: POS RTN
3 Pin 3: GND
4 dc power source
5 Disconnect device
5. Continue with “Powering on the EXP810” on page 69 for the initial startup of the
storage expansion enclosure.
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IBM System Storage DS4000 EXP810 Storage Expansion Enclosure: Installation, User’s and Maintenance Guide