Version: 2020-09-04
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Maintenance: Replacing a single a BACS module
Part 1 – Replace a single module
This example describes a problem with BACS module 3 Since the module 3 comes with a ring wiring, the modules 2 and 4 are still
available and work properly. By comparison, if module 19 would fail, modules 17 and 18 would have been equally affected - the
connection design is not a ring structure.
However, in case of a failure, the BACS webmanager will report a problem at module 3
How to proceed First open the battery separator to avoid an electric shock, safe your work place and take enough time to obey the
security rules for working on live parts.
1. Identify the harmed BACS module
Locate the BACS module with the associated battery and remove the BACS data cable. It is important in this context that the
exact ID of the BACS module is known so that you do not accidentally replace the wrong module
2. Remove the BACS data and measurement cables
Remove the BACS data cable as well as the measurement cable Please note that the BACS measuring cables installed on
battery side do not need to be removed - the changed BACS module will be re-connected.
3. Install the spare BACS module
First connect the BACS moduleto the measuring cables and proceed to connect the BACS data cables. After the module has
been initialized, press the button on the BACS module for about 10-15 seconds:
This forces the replaced module into a reset and it reverts to ID 0. This procedure will have effect on this specific spare
module and not the entire BACS installation. After reset, the module should now slowly flash red as an indication that its now
running on ID 0.
4. Open the build-in BACS programmer and configure the spare module
The module is currently with ID 0 in factory default state. Due to the fact there is only one module that provides ID 0, it is
possible to set manually ID 0 to the ID oft he broken BACS module. After leaving the BACS programmer mode, BACS will
initiate and the new module is active.
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