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Chapter 33. Uninterruptible power supply
You might decide to purchase an external uninterruptible power supply (UPS) for
your NAS Gateway 500. A UPS provides emergency backup power for a specified
amount of time when local power fails. This power comes from batteries housed
within the UPS. The actual amount of run time depends on the number and type of
feature codes installed and the capacity of the batteries in the UPS.
The Redundant or Interruptible Power for the IBM NAS Gateway 500 Technical
Note lists a set of supported UPS units.
Configuring a UPS on the NAS Gateway 500
You must complete the product setup and installation instructions that came with
your UPS before continuing. Your UPS batteries must be fully charged and the unit
operational. To configure your UPS:
1. Install the UPS in the rack by following the installation instructions that came
2. Connect the NAS Gateway 500 power cords to the appropriate output
3. Determine how you are going to monitor the NAS Gateway 500. Non-clustered
4. The power management software is now configured on the NAS Gateway 500.
To test the ability of your UPS to signal a shutdown:
1. Disconnect the electrical power supply for the UPS.
2. Wait for the UPS to signal the NAS Gateway 500 to shutdown.
© Copyright IBM Corp. 2004
with your UPS.
receptacle or receptacles on the UPS.
systems can use either serial port or Ethernet signaling. Clustered systems
must use Ethernet signalling.
a. If you are using serial port 3 (non-clustered systems only):
1) Connect the NAS Gateway 500 to the UPS communication port using
the communication cable that came with your UPS.
2) Turn on the UPS.
3) Install the necessary power management software (for example:
LanSafe for LanSafe III) on the NAS Gateway 500.
4) Configure the power management software on the NAS Gateway 500.
b. If you are using Ethernet signaling
1) Connect an active Ethernet cable to the Ethernet port on the UPS.
2) Turn on the UPS.
3) Configure the Ethernet interface (for example: Assign a IP address)
using the documentation that came with your UPS.
4) Install the necessary power management software (for example:
NetWatch) on the NAS Gateway 500.
5) Configure the power management software on the NAS Gateway 500.
To ensure that the NAS Gateway 500 is protected from power failures, test it by
simulating a power failure.
a. Disconnect the electrical power supply for the UPS. Do not disconnect the
NAS Gateway 500 from the UPS.
b. The NAS Gateway 500 should remain operational.
c. Restore the main power to the UPS.
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