Issue
Which TAC Xenta I/O modules can operate as stand-alone LonWorks devices?
Product Line
EcoStruxure Buildings Operation, TAC Vista
Environment
- TAC Xenta 420A
- TAC Xenta 421A
- TAC Xenta 422A
- TAC Xenta 450A
- TAC Xenta 451A
- TAC Xenta 452A
Cause
Not all TAC Xenta 400 series I/O modules are capable of functioning independently as LonWorks devices. Only specific models with an “A” suffix are designed for stand-alone operation.
Resolution
Only the following TAC Xenta I/O modules are capable of acting as stand-alone LonWorks devices:
- TAC Xenta 421A
- TAC Xenta 422A
- TAC Xenta 451A
- TAC Xenta 452A
⚠️ Note: TAC Xenta 400 series modules without the “A” suffix (e.g., 420, 421, 422, etc.) cannot function as stand-alone LonWorks devices.
Once communication is successfully established with a compatible Xenta I/O module, the green status LED will blink on for 1 second every 10 seconds, indicating that the device is operating in stand-alone mode.
Additional Information
In EcoStruxure Building Operation, the LonWorks device list may display Xenta I/O modules without the “A” suffix. This can be misleading, as these non-“A” models are not capable of stand-alone operation. They are included in the list solely to allow manual addition as I/O modules to programmable Xenta controllers.
