Allen Bradley 855E Series Sounder unit, 24 V ac/dc, AC, DC

Sound modules have continuous and pulsing tones. Maximum sound output is 103 dB at 1 m (3.3 ft). A reduced volume setting is available by changing the position of the volume DIP switch, which produces a sound output of 88 dB(A) at 1 m (3.3 ft). Maximum sound output is 80 dB(A) at 1 m (3.3 ft).

The Rockwell Automation control tower stack sound module has black housing and 24V AC/DC full voltage.

Single circuit piezo