Sentry Safety Relays Connection Diagrams

This document provides general connection diagrams for ABB Sentry safety relays, including models such as BSR10, BSR11, BSR23, SSR10, SSR20, SSR32, SSR42, TSR10, TSR20, USR10, and USR22. It covers various configurations, such as expansion relays, connections with Pluto, Inca1, Smile, and other safety devices, with the caveat that these are recommendations and the machine builder is responsible for achieving appropriate functional safety levels.