Sel 551 - Appendix B: Firmware Upgrade Instructions; Firmware; EPROM Firmware Upgrades

Date Code 20110408 Instruction Manual SEL-551 Relay
Appendix B
Firmware Upgrade Instructions
The SEL-551 Relay includes two firmware configurations:
➤ EPROM
➤ Flash
Upgrade EPROM firmware by replacing an integrated circuit (IC) component
on the SEL-551 main board. Upgrade Flash firmware by downloading the
firmware from a personal computer to the relay serial port. SEL ships EPROM
firmware upgrades in an IC and Flash upgrades on a diskette.
EPROM and Flash firmware may not be interchanged on a relay. To determine
the type of firmware in your relay, display the firmware version by pressing
the relay front-panel {STATUS} pushbutton. The relay displays the FID firmware
version string.
SEL-551 R100-series firmware versions are EPROM versions:
FID=SEL-551-R1xx-Vr-Dxxxxxx (for date codes prior to February 11,
2000)
or
FID=SEL-551-R1xx-Vr-Z001001 Dxxxxxxxx (for date codes February 11,
2000 or later)
SEL-551 R500-series firmware versions are Flash versions:
FID=SEL-551-R5xx-Vf-Dxxxxxx (for date codes prior to February 11,
2000)
or
FID=SEL-551-R5xx-Vf-Z001001 Dxxxxxxxx (for date codes February
11, 2000 or later)
EPROM firmware upgrade instructions are shown below. Flash firmware
upgrade instructions follow after.
EPROM Firmware Upgrades
Installing new EPROM firmware requires that you power down the relay,
remove the front panel, pull out the main circuit board, exchange an integrated
circuit (IC) component, and reassemble the relay. If you do not wish to
perform the installation yourself, SEL can assist you. Simply return the relay
and IC to SEL. We will install the new IC and return the unit to you within a
few days.
IMPORTANT NOTE
REGARDING SETTINGS:
The
firmware Upgrade Procedure may
result in lost relay settings due to the
addition of new features and changes
in the way memory is used. It is
imperative to have a copy of the
original relay settings available in case
they need to be re-entered. Carefully
following these upgrade instructions
will minimize the chance of
inadvertently losing relay settings.