Date Code 20171006 Instruction Manual SEL-400 Series Relays
Instruction Manual
APPENDIX B
Firmware Upgrade Instructions
These instructions guide you through the process of upgrading the firmware in
the device. Note that these instructions are only intended for upgrading firmware
from an older revision to a newer revision. Downgrading firmware—going from
a newer to an older revision—should not be attempted. It will result in the loss of
relay calibration, MAC addresses, and other device configuration information.
Please contact SEL if you need to downgrade the firmware in a relay.
The firmware upgrade will be either a standard release or a point release. A stan-
dard release adds new functionality to the firmware beyond the specifications of
the existing version. A point release is reserved for modifying firmware function-
ality to conform to the specifications of the existing version.
A standard release is identified by a change in the R-number of the device firm-
ware identification (FID) string.
Existing firmware:
FID=SEL-411L-R100-V0-Z001001-Dxxxxxxxx, or
FID=SEL-411L-1-R100-V0-Z001001-Dxxxxxxxx
Standard release firmware:
FID=SEL-411L-R101-V0-Z001001-Dxxxxxxxx, or
FID=SEL-411L-1-R101-V0-Z001001-Dxxxxxxxx
A point release is identified by a change in the V-number of the device FID string.
Existing firmware:
FID=SEL-411L-R100-V0-Z001001-Dxxxxxxxx, or
FID=SEL-411L-1-R100-V0-Z001001-Dxxxxxxxx
Point release firmware:
FID=SEL-411L-R100-V1-Z001001-Dxxxxxxxx, or
FID=SEL-411L-1-R100-V1-Z001001-Dxxxxxxxx
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