CTM Lyng MBD R 1 POLT 16A is a motion sensor with a single-pole potential-free (volt-free) relay output rated 16 A. The device is intended for automatic switching of external loads such as lighting circuits and small appliances via an isolated contact. Volt-free operation allows integration with heating, ventilation, and building-management systems that supply their own signalling voltage. Typical installation is in corridors, stairwells, technical rooms, and commercial premises where presence-based control is required.