The Siemens 3TK2825-1BB40 is a SIRIUS safety relay from the 3TK28 series, designed for the evaluation of actuator and sensor circuits in accordance with DIN EN / IEC 60204-1 in monitored start mode. It provides safe disconnection in machine safety applications such as EMERGENCY-STOP, protective door monitoring, and the safeguarding of presses or punches. The unit features three NO instantaneous enabling contacts and two NC signaling contacts with screw terminal connections, operating from a 24 V DC control supply. With dual-channel monitoring, it achieves a maximum Safety Integrity Level of SIL 3 and Performance Level PL e, dependent on external wiring. Its compact 45 mm housing and DIN-rail mountable SIRIUS design save control cabinet space, while feedback and start inputs enable flexible integration into machinery safety architectures. Item Details Brand Name: Siemens Manufacturer: Siemens AG Item Type Name: Safety Relay Product Family / Series: SIRIUS 3TK28 Safety Relays Sub Brand: SIRIUS Function: Safety relay with relay enabling circuits (EC) Ean: 4011209380691 Upc: 754554483412 Product Specifications rated_control_supply_voltage: 24 V DC control_voltage_tolerance: 0.85 to 1.1 x Ue enabling_circuits: 3 NO (instantaneous) signaling_circuits: 2 NC delayed_enabling_circuits: 0 overall_width: 45 mm electrical_connection: Screw terminal start_mode: Autostart / Monitored start feedback_input: Yes start_input: Yes cascading_input: No max_operating_cycles: 1000 1/h switching_capacity_AC-15_at_230V: 6 A switching_capacity_DC-13_at_24V: 6 A thermal_current_max: 6 A mechanical_service_life: 10,000,000 cycles electrical_service_life: 100,000 cycles max_SIL: SIL 3 (IEC 61508) max_PL: PL e (EN ISO 13849-1) conductor_size: 2 x 14-20 AWG (2 x 16-24 AWG fine-stranded) mounting: DIN rail (Screw and Snap-On) Additional Details Country of Origin*: Germany Lifecycle Status: Active Applications: EMERGENCY-STOP devices, protective door monitoring, press/punch safety Standards: DIN EN / IEC 60204-1, IEC 61508, EN ISO 13849-1 Protection Rating Housing: IP20 Protection Rating Terminals: IP20 Ambient Operating Temperature: -25 to +60 °C Ambient Humidity: 10 to 95% RH *Country of origin may vary. Measurements Dimensions: 44.8 x 102 x 120 mm (W x H x D)
