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.
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.
But there is a silent assassin that destroys all that hard work:
Bridging the Gap: Why your PL (Performance Level) doesn't matter if your SPD (Surge Protection) fails.
Don't let a $50 surge destroy a $50,000 safety system.
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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.
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
But there is a silent assassin that destroys all that hard work: We spend a lot of time calculating Performance
Bridging the Gap: Why your PL (Performance Level) doesn't matter if your SPD (Surge Protection) fails. 000 safety system.
Don't let a $50 surge destroy a $50,000 safety system.
