8 SL4-SWD and SL7-SWD base modules for signal towers8.1 INTRODUCTIONSmartWire-DT module IP20 01/20 MN05006001Z-EN www.eaton.com 2038 SL4-SWD and SL7-SWD base modules for signal towers8.1 INTRODUCTIONThe SL4-SWD and SL7-SWD base modules for signal towers are mountedfirmly on equipment by using a rapid mounting and wiring system. Up to 5light or acoustic modules can be interconnected on a base module in order toform a signal tower.A variety of light and acoustic modules are available for this purpose.With a high IP66 degree of protection, signal towers can be used in adverseenvironments. Moreover, their rapid mounting and wiring system makes iteasy to remove them and then mount them again after transportation.Finally, a variety of mounting configuration options and a choice between adiameter of 40 mm or 70 mm ensures that signal towers can be easilyadapted to any application.8.2 Surface mountingFigure 69: Lateral view of base modules→ The interoperability requirements for these SmartWire-DT mod-ules are described in → Section 13.6, „SWD module interoper-ability requirements“, page 259.SL4 SL7