GSA63100-11 is a DuplineSafe Safety Input Module designed to monitor the status of a single potential-free contact in safety devices such as emergency stops or pull-cord switches. The module is bus-powered by the Dupline network and transmits safety signals using two Dupline channels with dynamic signaling to ensure redundancy and continuous status updates. It features an IP67-rated compact housing (57.5 × 36.0 × 16.4 mm) constructed from Valox PBT material, making it suitable for decentralized installation at the actual location of safety switches. The module is approved according to IEC/EN 61508-SIL3, IEC/EN 62061-SIL3, and ISO/EN 13849-1 PL e by TÜV Rheinland Group and cULus, with response times of maximum 300 ms for contact opening and 600 ms for contact closing. This module is typically used in conjunction with the DuplineSafe Safety Relay GS38300143230 and is ideal for safety-critical applications requiring certified fault detection and continuous monitoring.