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3rt841b Firmware 2021 -

Once you have installed the 2021 firmware, follow these guidelines:

Go to the official Siemens support site. Search “3RT841B firmware 2021”. Ensure the article date is 2021 and version matches your exact article number (e.g., 3RT841B-1AP00). Do not use firmware from other models—it will brick the device.

Before diving into the software, it is crucial to identify the hardware correctly. The 3RT841B typically refers to a SIRIUS Solid-State Contactor (often confused with the 3RW soft starter series due to similar naming conventions). While soft starters (3RW) ramp voltage up and down, solid-state contactors (3RT) are designed for extremely high switching frequencies and noiseless operation.

Regardless of whether you are dealing with a 3RT solid-state contactor or a 3RW soft starter, the principles of firmware management remain the same: Firmware fixes bugs, improves compatibility with modern communication protocols (like PROFINET or EtherNet/IP), and ensures functional safety standards are met. 3rt841b firmware 2021

  • For AS-Interface Modules: Use an AS-i master programmer (e.g., Siemens 3RK1922-1AA00) to send the new firmware via the bus. This takes ~90 seconds.
  • Verify Update: Repeat the version check in TIA Portal. Successful update will show the 2021 version (e.g., V2.1.4 for 3RB3).

    • Caution: Never interrupt power during the firmware update. A corrupted bootloader will render the electronic module unusable, requiring return to Siemens.

    Cause: The 2021 firmware requires an initial password setup.
    Fix: Perform a factory reset using the DIP switch combination (see manual). Then assign a new password immediately.

    As of 2021, the firmware is not for the contactor coil but for the accompanying electronics. Below is the official table of firmware versions released for devices that mount onto or communicate with the 3RT841B: Once you have installed the 2021 firmware, follow

    | Component | Firmware Version (2021) | Release Date | Key Fixes | |-----------|------------------------|--------------|------------| | 3RB3 Electronic Overload Relay (Basic) | V2.1.4 | March 2021 | Fixed incorrect tripping on harmonic distortion | | 3RB3 with IO-Link | V1.3.0 | June 2021 | Added ISDU parameter download stability | | AS-Interface Module for 3RT8 | V3.0.1 | September 2021 | Resolved slave address loss after power cycle | | SIRIUS Soft Starter 3RW44 (used with) | V2.2.8 | December 2021 | Profinet RT cyclic data delay fix |

    Important: Do not attempt to “flash” the contactor itself. You cannot update firmware on a standalone 3RT841B mechanical contactor.

    After reboot:

    Throughout 2021, Siemens released multiple Product Information Notices addressing:

    Consequently, end-users began searching for firmware updates to resolve these specific issues, coining the search term.