Schweitzer Engineering Laboratories SEL-421-4 - Page 828

3.10
SEL-400 Series Relays Instruction Manual Date Code 20171006
Basic Relay Operations
Access Levels and Passwords
WARNING
If an incorrect password is entered three times, the relay asserts the BADPASS
and SALARM Relay Word bits for one second and displays on a communica-
tions terminal screen the following error message:
WARNING: ACCESS BY UNAUTHORIZED PERSONS STRICTLY PROHIBITED
In addition, you cannot make further access level entry attempts for 30 seconds.
The relay terminates the communications connection after the third failed attempt
when you use Ethernet via an Ethernet card, DNP3 (Distributed Network Proto-
col version 3.0), or M
IRRORED BITS communications virtual terminal mode. For
more information on these protocols, see Section 15: Communications Interfaces
and Section 16: DNP3 Communication.
If your connection to the relay has an inactivity time-out (in the SET P port set-
tings), the relay automatically closes the communications connection and
changes to Access Level 0 when the time-out occurs.
Passwords
Valid passwords are character sequences of as many as twelve characters. Valid
password characters are any printable ASCII character. HMI password entry is
limited to upper- and lowercase letters, numbers, underscore, and period, so you
must limit your password to these characters if you need to do privileged opera-
tions from the front panel. Passwords are case-sensitive.
This device is shipped with default
passwords. Default passwords should
be changed to private passwords at
installation. Failure to change each
default password to a private pass-
word may allow unauthorized access.
SEL shall not be responsible for any
damage resulting from unauthorized
access.
It is important that you change all of the passwords from their default values.
This will protect you from unauthorized access.
Use strong passwords. Strong passwords contain a mix of the valid password
characters in a combination that does not spell common words in any portion of
the password.
Changing the Default Passwords in the Terminal
Step 1. Confirm that the relay is operating (see Establishing Communication on
page 3.3).
Step 2. Establish communication with the relay (see Making an EIA-232
Serial Port Connection on page 3.4 to learn how to use a terminal to
communicate with the relay).
Step 3. Enter Access Level C (level 2 is sufficient except when changing the
level C password).
a. Using a communications terminal, type ACC <Enter>.
b. Type the Access Level 1 password OTTER and press <Enter>.
You will see the Access Level 1 => prompt.
c. Type 2AC <Enter>.
NOTE: Passwords are case sensitive;
you must enter passwords exactly as
set.
d. At the password prompt, type TAIL <Enter>.
e. You will see the Access Level 2 =>> prompt.
f. Type CAL <Enter>.
g. At the password prompt, type Sel-1 <Enter>.
You will see the Access Level C ==>> prompt.
Step 4. To set a new password for Access Level 2, type the following:
PAS 2 <Enter>.