Bridging the Gap: Why your PL (Performance Level) doesn't matter if your SPD (Surge Protection) fails.
Here is the hard truth: A lightning strike 100 meters away, or switching a heavy inductive load inside your plant, can generate a 6kV surge. That surge doesn't care about your safety rating. It will weld contacts, fry logic, and degrade sensitive semiconductors in your safety relays and PLCs. pl spd tool
Don't let a $50 surge destroy a $50,000 safety system. Bridging the Gap: Why your PL (Performance Level)
But there is a silent assassin that destroys all that hard work: and DCavg religiously.
We spend a lot of time calculating Performance Levels (PLr) for safety circuits under ISO 13849-1. We verify the Category, MTTFd, and DCavg religiously.