How to change the timeout of EM console in SOA 11g ?
1. In your SOA installation look for "emoms.properties" file
The path should be somewhere in your SOA_HOME under domains folder
SOA_HOME/user_projects/domains/base_domain/servers/AdminServer/tmp/_WL_user/em/hsz5x1/META-INF/emoms.properties
2. Edit the file and add the line
oracle.sysman.eml.maxInactiveTime= < value >
where Value it's in minutes
4. Restart Admin & SOA server.