Password Feature - Siemens 7SR224 Description & Operation

(1) Description of Operation 7SR224
6.10 P F
ASSWORD EATURE
The relay incorporates two levels of password protection – one for settings, the other for control
functions.
The programmable password feature enables the user to enter a 4 character alpha numeric code to
secure access to the relay functions. The relay is supplied with the passwords set to NONE, i.e. the
password feature is disabled. The password must be entered twice as a security measure against
accidental changes. Once a password has been entered then it will be required thereafter to change
settings or initiate control commands. Passwords can be de-activated by using the password to gain
access and by entering the password NONE. Again this must be entered twice to de-activate the
security system.
As soon as the user attempts to change a setting or initiate control the password is requested before
any changes are allowed. Once the password has been validated, the user is 'logged on' and any
further changes can be made without re-entering the password. If no more changes are made within
1 hour then the user will automatically be 'logged off', re-enabling the password feature.
The Settings Password prevents unauthorised changes to settings from the front fascia or over the
data comms channel(s). The Control Password prevents unauthorised operation of controls in the
relay Control Menu from the front fascia.
The password validation screen also displays a numerical code. If the password is lost or forgotten,
this code should be communicated to Siemens Protection Devices Ltd. and the password can be
retrieved.
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