Main Power Switch Module; System Unit Main Switch - IBM 7013 J Series Operator's Manual

Main Power Switch Module

The power system provides power and power regulation for all units of the 7013 J Series.
It enables you to power on and power off (also under operating system control) individual
units. This is particularly useful for handling power outages or to gracefully shutdown the
system in case of problems.
The power supply complex consists of:
the Main Power Switch Module
the Power Supply.
Each unit is equipped with one power supply capable of powering the maximum number of
devices that can be configured in a unit.
Each system unit houses one Main Power Switch Module on the rear left corner in the lower
part of the unit; this module contains the unit main breaker for the general AC power
ON/OFF control.
Attention: Before powering on the base system unit, be sure that the expansion unit main
power switch is set to on (I). If you attempt to power the base unit on when the expansion
unit is set to off (O), the power on will fail and an error code will be displayed in the operator
panel display.
Rear View of Base Unit Showing Main Power Switch Module

System Unit Main Switch

Attention: Data can be lost if you use the basic unit main switch to turn off the power to the
system unit without first using an appropriate shutdown command to stop the operating
system. Refer to "Powering Down Procedure" on page 2-11 for more information about the
shutdown command.
The System Unit Main Switch at the rear of the system unit can be used to switch off power
to all the components of the system unit.
The switch has the symbols (I) for ON and (O) for OFF.
Main Power Switch
Module with System
Unit Main Switch
Description of the 7013 J Series System
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