The SCHMERSAL AES 1102 series is a safety-monitoring module specifically engineered for integration with the BNS range of magnetic safety sensors. It serves as the critical interface between non-contact safety switches and the machine's safety-related control system, providing reliable monitoring of guard doors and protective equipment. The module is designed with a triple redundant structure, meaning that the safety function is maintained even after the occurrence of two independent faults—only a third fault could potentially lead to a hazardous situation. This architecture ensures that the requirements for fault tolerance according to EN 60947-5-3 are fully met, providing exceptional reliability for safety-critical applications.

From a safety classification perspective, the AES 1102 achieves Performance Level c (PL c) and Category 1 according to EN ISO 13849-1, and is suitable for applications up to Safety Integrity Level 1 (SIL 1) according to EN IEC 61508. The module provides one safety contact with STOP Category 0 functionality, meaning immediate removal of power to the hazardous motion. The output configuration includes two normally open (NO) contacts and four normally closed (NC) contacts, with a maximum switching capacity of 250VAC/8A using AgCdO contact material. The mechanical lifespan is rated for a minimum of three million operations under specified load conditions (max. 50,000 switching cycles per year and max. 80% contact load), with a mission time of 20 years. The PFH value is 1.14 × 10⁻⁶ per hour.

The AES 1102 incorporates several practical features that simplify commissioning and enhance operational safety. An automatic reset function eliminates the need for manual operator intervention after a safety event, while integrated wire breakage detection continuously monitors the integrity of the sensor connection. The module also features automatic reset after disconnection of the supply voltage and integral system diagnostics with a single LED status indicator for clear visual feedback. The series offers flexibility with five available operating voltage variants: 24 VDC (standard), 110 VAC, 230 VAC, 24 VAC, and 42 VAC, accommodating diverse industrial power architectures. The power consumption for the 24 VDC variant is 2.4 W.

Installation is designed for simplicity and reliability. The module snaps onto standard 35 mm DIN rails conforming to EN 60715, with compact dimensions of 22.5 mm width, 75 mm height, and 110 mm depth, and a gross weight of 120 g. Electrical connections are made via rigid or flexible screw terminals (M20 x 1.5) accommodating cable sections up to 2.5 mm², with a recommended tightening torque of 0.6 Nm. The enclosure provides IP40 protection, the mounting space requires IP54, and the terminals offer IP20 protection. The module operates reliably in ambient temperatures from 0°C to +55°C and withstands storage and transport temperatures from -25°C to +70°C. It meets rigorous electromagnetic compatibility and climatic stress standards including EN 60068-2-3 and BG-GS-ET-14. The AES 1102 is cULus certified and complies with a comprehensive suite of international standards including EN IEC 62061, EN IEC 60947-5-1/3/5, EN IEC 60204-1, and EN IEC 60947-1. The AES 1102 series is the ideal safety-monitoring solution for machine builders and system integrators seeking a certified, reliable, and easy-to-integrate interface for SCHMERSAL BNS magnetic safety sensors in guard door and access protection applications.

Technical Specifications