62 Upgrade and Maintenance Manual TX1320 M4
Basic hardware procedures
Redundant power supply
Ê Connect the power cords to the PSUs.
Ê If applicable, connect the mains plug to a grounded mains outlet in the in-
house power supply network.
I To provide true phase redundancy, the second PSU should be
connected to a different AC power source from the other PSU. If one
AC power source should fail, the server will still continue to run.
Ê Ensure that the status indicator on the PSU is lit green, see section
"Indicator on hot-plug PSU" on page 333.
Figure 15: Locking the cable clamp of a PSU
Ê Pull the cable clamp up (1).
Ê Thread the power cord through the cable clamp (2).
Ê Press the cable clamp down until it engages to secure the cable (3).
I It will take about 60 seconds until the server can be powered on.
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