ABB Sentry TSR20 Safety Expansion Relay with Delayed Outputs, 24VDC, 3NO+1NC, Screw Terminals

The ABB Sentry TSR20 Safety Expansion Relay is designed to enhance the safety and efficiency of your operations. This advanced safety relay features delayed relay outputs with 3 normally open (NO) and 1 normally closed (NC) contacts, powered by a +24VDC supply. It is equipped with screw terminals for secure and easy installation. Ideal for monitoring safety devices with contacts, it supports 1 or 2 equivalent channels and is compatible with safety devices featuring OSSD outputs. The relay offers an OFF-delay time that can be easily selected between 0.5 seconds or 1.5 seconds via a switch on the front panel. The Sentry TSR20 is part of a comprehensive range of safety relays that cater to various safety applications up to PLe / SIL3 standards. While basic models ensure reliable supervision of simpler safety functions, the universal models, like the TSR20, provide advanced features and high flexibility. For added convenience, models with displays offer preset configurations and detailed information to simplify troubleshooting. The TSR20 also boasts a high accuracy timer function with an adjustable time setting range from 0 to 999 seconds and a high output current capacity of up to 6 A, eliminating the need for an intermediary contactor. Additionally, the multi-reset feature allows up to 10 safety relays to be connected to a single reset light-button. All models, including the TSR20, are available with detachable push-in or screw terminals, and accessories such as terminals and coding kits for marking removed terminals are also available.