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Figure 20. Installing the uninterruptible power supply power cable
10. All front panel indicators of the UPS 5125 flash for a short time while the UPS
Figure 21. Power switch and indicators on the uninterruptible power supply 5125
46
IBM TotalStorage SAN Volume Controller: Installation Guide
1
1
Main power cable
If possible, ensure that the two uninterruptible power supplies are not both
connected to the same power source.
Attention:
Ensure that you comply with the following requirements for
uninterruptible power supplies:
v Each UPS 5125 should be connected to a separate branch circuit.
v A UL listed 15 A circuit breaker must be installed in each branch circuit that
supplies power to the UPS 5125.
v The voltage supplied to the UPS 5125 must be 200 – 240 V single phase.
v The frequency supplied must be between 50 and 60 Hz.
Note: If the UPS 5125 is cascaded from another UPS, the source UPS must
have at least 3 times the capacity per phase and the total harmonic
distortion must be less than 5% with any single harmonic being less
than 1%. The UPS 5125 should also have input voltage capture that
has a slew rate faster than 3 Hz per second and 1 msec glitch rejection.
5125 runs a self-test. When the test is complete, the mode indicator
flashes to show that the UPS 5125 is in standby mode. See Figure 21.
Press and hold the UPS 5125 on button
(approximately one second). The mode indicator stops flashing and the load
level indicators display the percentage of load that is being supplied by the
UPS 5125. The UPS 5125 is now in normal mode, and is charging its battery.
See Figure 21.
+ -
1
Mode indicator
2
On button
2
until you hear the UPS 5125 beep
1 1
100%
+ -
25%
1
2
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