NEC 5020M-16, NX7700i Emergency System Shutdown with AC SW, AC-LINK Auto Control, operation

Operation Procedure

3.3.Emergency System Shutdown with AC SW

The switches on the switch panel are provided for forced power off in the event that an emergency power shutdown is required. Do not use these switches in normal operation.

See 2.2.1 Cabinet for the location of the switch panel. See 2.2.6 Power Bay for the location of the AC switch on the base module and expansion power bay. The number of switches on the switch panel depends on the number of installed base modules and expansion power bays. Take care of the association between these switches and base modules and expansion power bays during switch operation.

The power can be shut down by pressing the AC switch on the switch panel at the front top of the cabinet. See 2.2.1 Cabinet for the location of the AC switch. When a UPS is connected, the power switch of the UPS does the same as the AC switch on the switch panel.

Use the power switch of the UPS for emergency power shutdown. Refer to the UPS manual for the power-off procedure. With basic configuration, if a UPS is connected, do not operate the switch panel.

CAUTION	Data may be destroyed when the AC switch is turned off during
	operation.
CAUTION	Provide criteria for operating the AC switch and use the switch
	according to the criteria.

3.4.AC-LINK (Auto Control)

When connecting a UPS or a new AOC to the system, you need to decide whether it is controlled automatically or manually, and if you select automatic control, ask our maintenance personnel to enable automatic control.

SP command	AC link mode	Description
SG	On	AC LINK is enabled (it is
		disabled by default).

The SP console screen for confirming and executing AC LINK is shown below.

CAUTION

When an automatic control system such as the rack management system is installed, wait for more than two minutes after OS shutdown to perform AC power-off control.

*If the AC power-off control starts within two minutes after OS shutdown, an error will occur during system shutdown, or the system will not start normally next time.

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