ST22-SD-24DC is an electronic part manufactured by Spamel with a sound signaller, 22mm diameter, IP20 protection rating, and a Man.series of ST22. It runs on a 24VDC power supply and has an Ø22mm body size. This part is a multifunctional alarm unit that features a sounder for audible warnings or alerts. It has a wide range of functions, such as remote control, phase failure detection, phase reversal, and can be easily integrated into an electrical system. Furthermore, it offers highly reliable performance, low-power consumption, and is suitable for a wide variety of industrial applications.