LED displays

| LED | Color | Meaning | |
|---|---|---|---|
| Run | green | This LED indicates the terminal's operating state: | |
| on | Normal operation | ||
| off | The RUN LED goes out if no process data is transmitted to the terminal from the Bus Coupler for 100 ms. | ||
| Error | red | General error is signaled | |
| Send | green | Data transmission on the M-Bus | |
| Receive | green | Data transmission on the M-Bus | |