🛑 Safety Voting Logic Explained Simply (SIS / ESD Systems)

In safety systems, voting logic determines when a shutdown should occur based on signals from multiple sensors.
The goal is to balance Safety and Plant Availability ⚙️.

Here are the common voting logics used in industry 👇

🟢 #1oo1 Voting Logic (One out of One)
➡️ Trip occurs if 1 sensor detects danger

⚡ Fastest response
🔧 No redundancy
⚠️ Sensor failure can cause false trip

🟢 #1oo2 Voting Logic (One out of Two)
➡️ Trip occurs