The ABB 2TLA010041R0600 — known as the Sentry BSR23 — is a safety‑expansion relay designed to increase the number of safe output contacts in a machine’s safety circuit when additional outputs are needed. It is intended to be used in conjunction with a main safety relay or safety PLC; it does not itself monitor safety inputs (emergency stops, light‑curtains, etc.), but provides additional failsafe relay outputs. The module is compact, DIN‑rail mountable, and uses screw‑terminal wiring, making it suitable for integration in control panels with limited space.
