Parts overview
- USB port, for connecting to the laptop and powering the unit
- PWR LED, green
- ERR LED, red
- RX LED, yellow
- TX LED, yellow
- MBus connection, the pluggable screw terminal
LED indications
PWR LED (green)
| Mode | Meaning |
|---|---|
| Permanently on | USB power connected |
| Permanently off | No USB power connected |
ERR LED (red)
| Mode | Meaning |
|---|---|
| Permanently on | Short circuit or overload on the MBus |
| Permanently off | Normal mode, idle |
| Short flash every second | No MBus slaves connected |
| Flashing for 1 second | MBus slave collision |
RX LED (yellow)
| Mode | Meaning |
|---|---|
| On or flashing | An MBus slave is transmitting data |
| Off | No MBus slave is transmitting |
TX LED (yellow)
| Mode | Meaning |
|---|---|
| On or flashing | The computer is transmitting data |
| Off | The computer is not transmitting |