there is no separate timeout for the Event dashboard.
The time out is defined for each datasource in the ncwDataSourceDefinitions.xml in below section.
<!--
Data source connection parameters eg. timeout for query statements -->
<ncwConnectionParameters>
<ncwStatementParameters>
<ncwQueryTimeout baseTime="60"/>
</ncwStatementParameters>
</ncwConnectionParameters>
#Netcool#Support#SupportMigration