Audible Signalling Device for Hazardous Atmospheres and Rugged Environments

Introducing the YA11 sounder, R. STAHL (Germany) has extended its Yodalex line of signalling devices. The YA11 is designed to be mounted in panels used in Zone 2 or 22 hazardous areas. It provides an audible signal that could be used to alert operators to malfunctions, process breakdowns or draw the operator's attention to the panel. The lightweight, low-profile aluminium enclosure of the YA11 can be mounted to panels, bulkheads, and any suitable surface of an enclosure or control station. With a height of merely 28 mm, it requires little installation space. Electronics are encapsulated to provide protection; and impact or entry is prevented by the use of a tamper-proof protective cover. The YA11 sounder is pre-wired with a 3 m cable, making installation quick and cost-effective. The unit is certified to a level of IP66 / NEMA 4X and when installed, this level of protection is maintained between the sounder and the panel by means of a closed foam gasket and stainless steel fixings which are included as standard. A replacement installation kit is available if the YA11 needs to be removed and then re-attached.

The YA11 has a factory adjustable alarm generator. Users can choose from a selection of 32 international sound tones, to be specified at point of ordering. The unit is operated with a nominal supply voltage of 24 V DC (18 - 32 V DC), with a sound output of 100 dB at a 1 m distance and a nominal current consumption of only 70 mA. Suitable for a temperature range of -40 to +70 °C and featuring certifications for global use (ATEX, IECEx, UL and ULC), the YA11 is a competitive and technically attractive solution for OEMs, panel builders and specifiers worldwide.