Key Technical Parameters General & Safety Model / Part Number: ABB BSR11 24 VDC Series: Sentry Safety Relays Device Type: Safety relay / expansion relay Supply Voltage: 24 V DC Function: Safety monitoring and expansion of safe outputs Mounting: DIN‑rail (IEC TH35) Protection Degree: IP20 Outputs & Contacts Contact Configuration: 4 normally open (4 NO) relay outputs Output Rating: ~5 A operational current (AC‑15) ~6 A operational current (DC‑13) Contact Type: Mechanical relay outputs with screw terminals Control & Operation Safety Inputs: Designed to connect safety switches such as emergency stops directly into the supply circuit Reset Mode: Selectable reset (e.g., manual/automatic multi‑reset options depending on wiring/configuration) Indicators: LED status indicators for outputs and diagnostics Electrical & Environmental Rated Frequency: DC supply (no AC frequency dependency) Terminal Capacity: Suitable for conductors ~0.2–3.3 mm² (solid/stranded with ferrules) Tightening Torque: ~0.7 N·m (recommended) Operating Temperature Range: Approximately −25 °C to +65 °C Storage Temperature Range: Approximately −40 °C to +70 °C Physical Width: ~22.5 mm Height: ~120 mm Depth: ~120 mm Weight: ~0.19 kg Applications Safety Monitoring: Emergency stops and safety interlocks Output Expansion: Increasing safe output count of safety PLCs/relays Machine Safety Controls: Industrial machinery requiring reliable safety switching Control Panels: Integration in safety control and automation panels