Double button green/red, LED 24V Harmony XB4 XB4BW73731B5

Application and Design

This dual control button from the Harmony XB4 series is a reliable solution for control and signaling in industrial, automation, and other applications requiring robust and intuitive operation. Equipped with two independent elements — a green button with the symbol "I" (on) and a red button with the symbol "O" (off) — it ensures intuitive handling and quick function identification. Additionally, the 24V AC/DC LED backlighting enhances visibility even under poor lighting conditions.

Construction and Installation

The button is designed for mounting in holes with a diameter of 22.5 mm. Its solid construction with a metal front ring provides high resistance to mechanical damage, while screw-type connections ensure safe and stable electrical contact. Thanks to its IP66 and NEMA 4X protection rating, the button is resistant to dust and water ingress, enabling use in harsh industrial environments. The use of high-quality materials guarantees long-term, fault-free operation.

Functionality and Specifications

The button features a contact configuration of 1NO (normally open) + 1NC (normally closed), allowing its use in various control circuits. The C-characteristic contacts provide delayed response to transient current surges, which is particularly important when starting motors or other devices generating high inrush currents. The 24V AC/DC LED backlighting ensures clear status indication. Mechanical endurance of up to 1000000 cycles guarantees a long service life even under intensive use. The button complies with multiple safety and quality standards, including EN/IEC 60947-1, EN/IEC 60947-5-1, and CSA C22.2 No 14, confirming its reliability and compliance with applicable regulations.