Allen-Bradley 445L-R4S1680YD Light Fixture

The Allen-Bradley 445L-R4S1680YD is the receiver unit in a GuardShield Safe 4 safety light curtain pair designed for machine guarding. When used with the matching 445L-T4S1680YD emitter, it delivers a 30 mm resolution over a protected height of 1680 mm and a sensing range of up to 18 meters. This receiver is part of the 445L family of safety light curtains and provides a rapid response time of approximately 42.3 milliseconds, enabling timely machine shutdown upon beam interruption. Typical applications include protecting personnel from hazardous moving machinery in industrial environments, where the beam curtain acts as a safety barrier to halt operations if the field is breached. The 445L-R4S1680YD is sold as part of a complete light curtain system, with the paired emitter and receiver weighing about 6.9 kg per pair, reflecting the compact yet robust design common to Safe 4 configurations. For proper operation, it should be paired with the corresponding emitter (T4S1680YD) and installed according to Rockwell Automation guidelines to ensure correct alignment, protection height, and range.