Power Synchronized Connections
This section describes the connections to automatically turn the ETERNUS AF on or off from a server.
In order to control powering the ETERNUS AF on and off with servers, the power control of the ETERNUS AF must
be linked with all of the connected servers.
Power Synchronized Connections (PWC)
■
Power Synchronized Unit
A power synchronized unit enables the ETERNUS AF to be powered on and off with a server. The power
synchronized unit detects changes in the AC power output of a UPS unit that is connected to a server (server UPS
unit) and automatically turns on and off the ETERNUS AF. In addition to server UPS units, units that control the
AC socket power output can also be connected. When three or more servers are connected, power can be
synchronized by adding an AC sensor unit.
●
Power Synchronization via a Server UPS Connection
The power synchronized unit detects the AC power output of the target devices for power synchronization
and instructs the ETERNUS AF to synchronize the power with the target devices.
When the power synchronized unit detects the AC power output of a server's UPS unit, the power
synchronized unit instructs the ETERNUS AF to turn on.
When the power synchronized unit does not detect AC power output in any of the server's UPS units, the
power synchronized unit instructs the ETERNUS AF to turn off.
The server UPS unit must have a function in the management software that controls the AC power output
according to when the server powers on and off. The server UPS unit must have one unused outlet to
connect to the power synchronized unit.
•
When connecting one or two servers
Figure 77
Power Supply Control Using a Power Synchronized Unit (When Connecting One or Two
Servers)
RS232C cable
Server
ETERNUS AF
PWC
UPS setting
Power synchronized unit
PWC
UPS
UPS
management
software
An instruction is
issued to turn
on/off the ETERNUS
AF when AC
output/no AC
output is detected.
Turns on: 1
Turns off: 2
Turns on: 2
Turns off: 1
3
4
Powering on sequence
1
Power on of all the server UPS units
3. Connection Configuration
Power Synchronized Connections
134
Design Guide
Summary of Contents for ETERNUS AF S3 Series
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