| Indicators | Description |
|---|---|
| PWR (green) | Module power indicator: ON: the module is powered on normally; OFF: the module is not powered on; |
| RUN (green) | Communication indicator: ON: normal communication OFF: abnormal communication |
| I1~I16 (green) | Digital input indicator. The corresponding indicator will be on when a signal is detected. |
| Q1~Q16 (green) | Digital output indicator. The corresponding indicator will be on when a signal is detected. |