The ABB CL2‑523C is a compact illuminated pilot light designed for panel mounting and visual signaling in industrial control systems, automation panels, and machinery operator stations. It features an integrated LED light source with a clear (transparent) lens, providing bright and long‑life indication at 230 V AC supply. The pilot light comes in a compact 30 mm diameter housing and uses screw terminals for easy installation and secure connection. Its robust construction supports high resistance against dust and water ingress on the front face, making it suitable for demanding indoor and outdoor industrial environments.