Modern relays can check some basic functions like the power supply, processor, temperature, and circuit board components and create an alarm if any of those parts fail. That’s a small part of the relay’s construction and function, but it is a start. If the relay fails this test, there is no point in continuing; so we’ll do it first.
Watch this video to see what I look for when verifying the self-test results on various relay models.
Click “Mark Complete” below after watching the video so you can keep track of your progress.