This Harmony XB5 lighting block with body/fixing collar uses a BA9s Base Integral LED. It is powered by 110 to 120VAC and has screw terminals. It has 1 x normally closed + 1 x normally open contacts and a plastic body and is compatible with the Harmony XB5 indicator lights. This light block allows for quick and easy replacement and configuration of your signaling devices. It is easy to install and replace on compatible illuminated pushbuttons or selector switch units via a plug-in assembly and connected with simple screw terminal connections. It allows visual differentiation of signaling devices by lighting with the BA9s Base Integral LED. With an IP20 rating, it protects the operator from unexpected contact with live circuits.