When the device is powered, all LEDs play a short start-up animation. After that each LED shows the state of its own channel.
Device LEDs
- PWR: white while the device runs, green while a phone is connected over Bluetooth.
- BUS and ETH: show the RS-485 line and the Ethernet link. They are driven directly by the hardware and are not affected by settings.
Digital inputs (DI)
- Green: input active.
- Blue: input active in reverse mode.
- Orange flash: each pulse on an input used as a counter.
Universal inputs (UI)
- Green or blue blinking: analogue reading within range.
- Steady turquoise: reading at the top of the range.
- Orange: temperature sensor working normally.
- Red: sensor shorted (steady) or open (blinking); a 2–10 V or 4–20 mA signal below its lower limit.
Outputs (DO and FIO)
- DO: green or blue while the output is on.
- FIO analogue output: purple blinking within range, steady purple at the top.
- Orange FIO on FiO-40: communication was lost and the channel went to its defined default value.
Including what the LEDs show in a fault report helps to locate the source of the problem.
Detailed technical values are given in the product datasheet; our dealers can assist you with your project.