How to troubleshoot Allen-Bradley Accessories power indicator LED not lighting up?
- ZZachary MasonAug 2, 2025
If the power indicator LED on your Allen-Bradley Accessories doesn't light up, it could be due to a few reasons. First, ensure the power supply is switched on, unless there's a valid reason for it to be off, such as maintenance. If it is off, switch it on. Next, check the 4-pin M12 plug to ensure it's properly connected to the sensor and that the cap nut is tightened by hand. Lastly, inspect the wiring in the splitter or control cabinet for any faults and repair them as needed.