IBM SY44-5902-05 Hardware information, System power overview Power supply, Battery power unit

Ethernet/IEEE 802.3 transceiver adapter cable		PCI communications card wrap connector
and card wrap	. 264	wiring	. .	.	.	266
Facsimile adapter cable wrap connector wiring	265	Communications signal voltage levels .	. .	.	.	267
DDI transceiver adapter cable and card wrap	265

Hardware information

The iSeries system consists of the system unit and the various attached hardware.

For more information on system hardware, see the following:

vChapter 2, “Hardware Service Manager” on page 45

vChapter 3, “Product Activity Log” on page 99

v“System power overview”

v“Resource names” on page 242

v“Type, Model, and Part Number List” in the Problem Analysis information for your system.

vLocations and addressing sections in the Problem Analysis information for your system.

v“Configuration Rules” in the AS/400e server 170, 250, 6xx, 7xx, and Sxx System Installation and Upgrade information.

Note: Configuration rules information is not available for all system types.

System power overview

Power supply

Power for the iSeries systems is supplied using the distributed power concept or by a centralized power supply. The power supply in a distributed power system provides a single voltage to the system bus and device regulators. Power supplied by a centralized power supply provides all the voltages that are needed in the system. For information on the power distribution, see “Locations and Addresses” in the Problem Analysis information for your system.

Battery power unit

The battery power unit is available on most iSeries models that have system power control network (SPCN) installed and some iSeries models without SPCN until release V5R1 (dual line cord power backup is available on most models later than release V5R1). It provides temporary auxiliary power to the system in the event of an ac power loss.

When you install or replace a battery power unit in a non-SPCN model, you should update the system information by selecting the Battery power unit information option from the Hardware Service Manager display. This option allows you to display the location of the battery power units on the system and update the manufacture dates.

To update this information on a system that contains SPCN, select System Power Control Network (SPCN) from the Hardware Service Manager display.

For more information on the Battery Power Unit Information option, see “Battery power unit information” on page 55.

230Service Functions V5R2