ADLINK cPCI-3510 Series - Manual (Page 133)

BIOS Setup Utility 119
cPCI-3510
8.6 Security Setup
Administrator, User Password
If only the administrator's password is set, then this only limits
access to setup and is only asked for when entering setup.
If only the user's password is set, then this is a power on password
and must be entered to boot or enter setup. In setup the user will
have administrator rights.