ACS850 Prevention of Unexpected Startup Safety Function Implementation Guide

This technical document details the design and implementation of a Prevention of Unexpected Startup (POUS) safety function using an ABB ACS850 drive with integrated Safe Torque Off (STO) and a safety relay. It covers compliance with machinery safety standards (EN/IEC 62061, EN ISO 13849-1, EN 1037, ISO 14118), provides SIL/PL calculations using ABB's Functional Safety Design Tool, and outlines the safety function loop, verification, and validation process.