Siemens – 3TK2840-2BB40 – SIRIUS Safety Relay w/ Electronic Enabling Circuits

The Siemens 3TK2840-2BB40 is a compact safety relay from the SIRIUS 3TK28 family. It features electronic enabling circuits (EC) for safe monitoring of emergency stops, guard switches, or safety gate circuits. Designed for use in functional safety systems, it provides reliable switching logic and diagnostic feedback in safety control loops.