Allen-Bradley 855H-R30C Audible Warning Device

The Allen-Bradley 855H-R30C is a rugged, 10–30 V DC frame C recordable horn designed for industrial signaling in harsh environments. It delivers a high-visibility audible alert with 101 dB(A) voice output and 110 dB(A) tone at 1 m, with 45 selectable tones across 4 output stages to suit varying alert requirements. Housed in a gray enclosure and rated UL Type 3R/4/4X/13 with IP66 protection, the 855H-R30C is built to withstand dust and water exposure while mounted on equipment or panels. This model is a pure horn device (no beacon) and is specifically designed for installations where a programmable, loud alarm is needed across manufacturing floors, process lines, or safety shutoff systems; its 10–30 V DC supply supports common industrial control voltages, and the four-stage sequence enables flexible signaling patterns without external modules. Ideal for OEMs and maintenance teams seeking a configurable, durable audible warning solution, the 855H-R30C pairs with standard signaling practices on Allen-Bradley control architectures and can be integrated into safety interlock and machine alarm schemes where a robust, programmable audio response is essential.