ABB 2TLA010053R0400 Safety Relay

ABB SENTRY SSR42 safety relay, model 2TLA010053R0400, is a 24 VDC safety interface designed for DIN-rail mounting in industrial control panels. It provides four safety contacts: two standard normally-open outputs and two delayed normally-open outputs (OFF-Delay), with an OFF-delay of about 1.5 seconds, enabling staged safety control for emergency stops, safety interlocks, and safety-rated actuators, while wiring is done via screw terminals for secure field connections. The device belongs to ABB's Jokab Safety family of safety relays and is documented in ABB safety catalogs as the SSR42 variant 2TLA010053R0400, suitable for monitoring safety devices and driving safe shutdown sequences in automation systems. This configuration supports robust safety logic in machine safety circuits, offering reliable isolation and straightforward integration with other safety components in control panels.