6-12 Installation Date Code 20011026
SEL-321/321-1 Instruction Manual
2. Connect the devices you desire to the SEL-321 Relay rear-panel DB-9 communication ports
using SEL cables, or their equivalents. Cable information is located earlier in this section.
3. Connect power and ground, alarm, IRIG-B, and other cabling on the rear panel.
4. Connect a terminal (or computer equipped with terminal emulation software) to the front-
panel connector Port 3 of the SEL-321 Relay using an SEL-C234A cable or equivalent.
5. Set the computer terminal or emulation software to operate at:
2400 baud, 8 data bits, 1 stop bit, no parity
6. Press <ENTER> and verify that a “=” prompt is returned.
7. Type ACCESS<ENTER> to change to Access Level 1. If you enabled password
protection, enter the factory-set password by typing OTTER<ENTER> at the password
prompt. You should now have a “=>” (Level 1) prompt
8. Type STATUS<ENTER> and verify that a status report appears on your terminal. Confirm
that IRIG-B, PORT, and I/O board connections/configurations match your expectations.
Change the SEL-321 Relay settings as desired/required to suit the application (as outlined in
other sections of this manual) and verify that their operation matches your expectations.
9. After you have installed the SEL-321 Relay, perform the checkout procedures in Section 7:
Maintenance and Testing. You may follow the suggestions there, or combine them with
your normal practice. Never implement recommendations prohibited by the rules of your
normal practice.
10. When local checkout is complete, check communications with the SEL-321 Relay via the
remote interface (if applicable). Make sure the automatic port is properly assigned and that
the desired timeout intervals are selected for each port. Lastly, be sure to record password
settings. This step completes installation of the SEL-321 Relay.
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