PiXtend eIO Hardware Manual
5.7. Troubleshooting
If the PiXtend eIO system does not behave as expected, you will find some starting points
for troubleshooting here.
Problem
Nothing happens after connecting the power supply to PiXtend eIO. The green LED
"+5V" does not light up.
Troubleshooting & Solution
Check that the power supply is correctly polarized and set to a voltage between 19 and 30
V DC. It must be a power supply that outputs a stabilized DC voltage. Detailed
requirements for the power supply can be found in the chapter 6
Problem
After connecting the power supply with PiXtend eIO, the red ("ERR") and orange
"COM" LEDs flash briefly. Is that normal?
Troubleshooting & Solution
Yes, that is absolutely normal. It is an optical control that signals that the device's micro-
controller is programmed. We need this functionality in manufacturing and quality control.
If the red LED "ERR" flashes continuously, this is a sign that you have selected Modbus as
protocol / mode and set an invalid address. Change the address using the DIP block
"ADDRESS" and restart the device.
Problem
The digital outputs do not seem to work. In the "1" or "true" state there is no
voltage at the output or the connected consumer does not react. However, the LED
of the respective output lights up.
Troubleshooting & Solution
The digital outputs must be supplied separately with voltage (connections "VCC DO" (+)
and "GND" (-) on the respective connector "DIGITAL OUT"). Four digital outputs each
have a common supply connection (VCC DOx-x).
If no voltage is applied here, no voltage can be output at the outputs. The respective LED
"VCC-DOx-y" on PiXtend eIO signals the presence of a voltage at the associated
connection (range 5 - 30 V).
The status LEDs of the digital outputs also light up in the active state if no voltage was
applied to VCC-DOx-y.
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