ThyssenKrupp – SR2 Safety Circuit Module – Elevator Levelling/Safety Relay 24VDC

The ThyssenKrupp SR2 is an elevator safety circuit module designed to replace mechanical safety switches for door locking and levelling control. It monitors dual-channel sensors (light barriers, position switches), ensures synchronous operation, and safely interrupts the 230 V AC drive circuit in unsafe conditions. Manufactured to EN 81-20/1/2 safety standards and TÜV‑certified, it’s commonly used during open-door levelling operations in TKE/Tyssenkrupp elevator systems.  

 Key Features & Specifications

• Model: SR2 (ThyssenKrupp Aufzugswerke, also labeled 65190007497)  

• Function: Two-channel monitored safety relay for elevator drive circuits (levelling, open door)  

• Inputs: Dual sensor inputs (Channels 1 & 2) via terminals 2/5 and common return 6; front LEDs for H1–H4 status

• Outputs: 230 V AC safety interruption contacts between terminals 7 and 8; feedback loop/output pins 3 and 9 for PLC

• Supply Voltage: 24 V DC (terminals 1 & 6), 1 A max contact output @ 24 V PLC feedback  

• Approvals: TUV Rheinland type approval (RB‑97A128); compliant with EN 81‑1/2 annex F, EMC EN 12015/16  

• Housing: DIN-rail mount, IP20-rated, size ~99 × 25.5 × 114.5 mm, ambient −25…+65 °C  

• Safety Operation: Redundant channel logic, auto-relock prevention, and fault detection for sensor or relay failure