Indicator Description
| Indicator | Description |
| PWR (Green) |
Coupler power indicator: On: Module is powered normally; Off: Module is not powered or powered abnormally. |
| PWR_IO (Green) |
IO power indicator: On: IO power supply is normal Off: IO power is not supplied or abnormal |
| BF (Red) |
Bus fault indicator: Steadily lit: Configuration error Off: Module Normal |
| RUN (Yellow) |
Bus communication indicator: Flashing: Module normal Off: Communication abnormal |