This Harmony ZB, red light block operates with an integral LED. It is supplied with 230V to 240V AC and uses screw clamp terminals. It has a plastic body. This light block allows fast and easy replacement and configuration of your signaling units. It is easily installed and replaced on compatible illuminated push-button or selector switch units via clip together assembly and connected with simple screw-clamp connections. It enables visual distinction of signaling units via illumination by integral LED. It protects operators from unexpected contact with live circuits thanks to its IP20 protection index. It features high endurance LED lighting for less replacement and process downtimes. Vibration resistant screw clamp connection terminals ensure high vibration resistance making product suitable installation on high impact machine.