Allen-Bradley 855P-B30ME22 Panel Mount Sounder

The Allen-Bradley 855P-B30ME22 Panel Mount Sounder is a compact 45 mm-diameter alarm with a black polycarbonate housing that operates from 12–24 V AC/DC (8–26 V range, 50/60 Hz). It delivers 85–100 dB at its main 3300 Hz tone with pulsing output and stepless sound level adjustment, making it suitable for panel-mounted signaling in control cabinets. The unit mounts via central bore holes for 22 mm or 30.5 mm (with an adapter kit) and carries IP65/NEMA 4X protection. Its dimensions are 60 mm in height, 45 mm outer diameter, and about 35 g in weight; electrical connections use a plug-in terminal block up to 2.5 mm² (14 AWG), with IP2X terminal protection. The nominal current is 20 mA at 24 V (50/60 Hz).