Description
2.8 Communication and system connection
3WA1 air circuit breaker
142 Equipment Manual, 02/2023, 92310000002-06
Firmware update
You always perform a firmware update of an 3WA air circuit breaker via the SENTRON
powerconfig configuration software.
To perform the firmware update you must:
• for a 3WA circuit breaker, connect an input device with the current version of the
SENTRON powerconfig configuration software installed to the USB-C interface of the
ETU600.
• for a 3WA non-automatic circuit breaker, transmit the update to the non-automatic
circuit breaker via a communications module.
Firmware file
There are different electronic modules for the 3WA air circuit breaker.
The respective firmware required for the individual modules is combined in a common
firmware container. Therefore, only one firmware file is needed.
The SENTRON powerconfig configuration software checks the respective firmware
versions and updates each module automatically with the correct firmware.
Signed firmware
The firmware of the 3WA air circuit breaker is signed by Siemens with a private key.
During the firmware update, the signature in the device is checked with the public key.
Manipulations or errors are detected immediately and reliably prevent a firmware update
in such a case. The Siemens private key is stored and protected on a high-security
server.
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