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Tonya HuynhAug 12, 2025
Why do Honeywell Motherboard RS-485 users not function?
- DDerek PattersonAug 13, 2025
There are several reasons why the RS-485 users might not function: * The user may not have an RS-485 address yet. To resolve this, activate address assigning mode. * The end-of-line resistors on the RS-485 bus may not be active. Check the JP15 plug-in bridge and provide EOL resistors in front of the users at each end of the bus line if necessary. * The current drain might be too high on connection U_BDT, as the current limitation is activated at approximately 200 mA. In this case, supply consumers via U_ext.
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