Uninterruptible power supply

To meet the power protection needs of IBM® servers, uninterruptible power supplies are available for System i®, System p®, and Power Systems™ configurations. The uninterruptible power supply is the IBM type 9910.

The IBM 9910 uninterruptible power supply solutions are compatible with the power requirements for System i and System p servers and have passed IBM testing procedures. The uninterruptible power supplies are intended to provide a single source for purchase and protection of IBM servers. All 9910 uninterruptible power supplies include a premium warranty package that is designed to enhance the potential for return on investment over the uninterruptible power supplies available on the market today.

Type 9910 uninterruptible power supply solutions are available from Eaton.

1827 service processor communications port to uninterruptible power supply cable for System i5®, System p5, and Power Systems

The 1827 is a 140 mm (5.5 in.) service processor communications port to uninterruptible power supply cable for System i5, System p5®, and Power Systems models. Uninterruptible power supply communications is supported through a designated service processor communications port through the 1827 cable. See the following figures.

Figure 1. Models 520 and 52A rear view with cable installation location

Figure 2. Models 550 and 55A rear view with connection port

Figure 3. Models 570, 561, and MMA rear view with connection port

Note:

On some models, a label by the ports shows the serial port symbol and a number 2 or S2 instead of the location P1-T2 or P1-T4. Here are examples: On a model 9409-M50, figure 249 shows the UPS port as P1-T2. On the frame of the M50, this will be the serial symbol and the number 2. In Figure 248, a model M25 shows the connection as P1-T4. The label on the back will be the serial symbol and S2.

The cover of the system has a label that matches the figures in this section.

Figure 4. Models 570, 561, and MMA drawer layout

Figure 5. IBM Power 520 (8203-E4A, 9407-M15, 9408-M25) System Serial Cable 2 (P1-T4)

Figure 6. IBM Power 550 (8204-E8A and 9409-M50) System Serial Port 2 (P1-T2)

Figure 7. Model 9406-595 and 9194 base PCI-X expansion tower rear view with J14 connection port

Note: The 8-core, 12-core, and 16-core processor configurations for the model 570 consist of several 4-core processors connected together. At a minimum, the 1827 uninterruptible power supply converter cable must be connected to the 4-core drawer that has the operator’s panel on the front of the unit. If models 570 and 561 have the redundant FSP option, the uninterruptible power supply converter cable should be connected to P1-T2 on the Secondary 1 drawer, see the previous figure. Model MMA comes with a redundant FSP and the 1827 should be connected to both the primary and secondary 1 drawers.

The service processor communications port supports two modes: RS-232 service processor communications port mode and uninterruptible power supply mode. Only one mode is supported at a time. The service processor will detect the presence of an uninterruptible power supply attached through service processor communications port through the 1827 cable when the server is started and set the control hardware to condition the signals for the uninterruptible power supply. The mode cannot be changed unless the system is started again. The following figure shows the converter cable wiring.

Note: Serial ports are rendered useless for AIX® use when an Hardware Management Console (HMC) is connected. However, platform connection to the UPS, which is managed by the FSP, is independent of an HMC being attached. Whether or not an HMC is connected, the designated serial port for UPS attach will setup correctly in feature code 1827 is connected before power is applied to the server (UPS attach is detected on FSP IPL). The serial ports are not standard EIA-232 ports. Therefore, the UPS must be attached through the 1827 cable and a relay contact interface (such as IBM type 9910, feature code 2939) via the UPS to use the IBM platform managed solution.

To use a standard UPS manufacturer serial interface and UPS monitoring application for the AIX operating system, an asynchronous adapter (such as 2943 and 5723) must be installed and configured in AIX. The IBM i operating system only supports the IBM platform managed solution.

For the 9194, the 1827 convertor cable is not needed. Plug the System i uninterruptible power supply communications cable provided by the uninterruptible power supply supplier into the J14 port.

Figure 8. 1827 converter cable schematic for System i5 servers

Both ends of the cable have a female 9-pin D-shell connector. The following figure shows the serial to uninterruptible power supply converter cable end (designated B) that plugs into the service processor communications port on the 9406-520, 9406-550, and the 9406-570. It has external threads that mate with the cable retention on the service processor communications port. The other end of the cable (designated A) plugs into the uninterruptible power supply vendor-supplied cable for System i communications. It has threads that mate with the cable external threads on the uninterruptible power supply.

Figure 9. Uninterruptible power supply connector for the uninterruptible power supply communications cable

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Last updated: Tue, June 17, 2014