IBM 71453RU manual Installing optional devices

vThe IBM MAX5 for System x memory expansion module comes with one or two 675-watt hot-swap 12-volt output power supplies (depending on the model). The input voltage is 110 V ac or 220 V ac auto-sensing. Two power supplies must be installed for redundancy support.

Note: You cannot mix 110 V ac and 220 V ac power supplies in the memory expansion module; it is not supported.

vThese power supplies are designed for parallel operation. In the event of a power-supply failure, the redundant power supply continues to power the server. The memory expansion module supports a maximum of two power supplies.

Statement 5

CAUTION:

The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

Statement 8

CAUTION:

Never remove the cover on a power supply or any part that has the following label attached.

Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a with one of these parts, contact a service technician.

To install a hot-swap power supply in the memory expansion module, complete the following steps:

1.Read “Safety” on page v and “Installation guidelines” on page 38.

Chapter 2. Installing optional devices 89