Specifications General Type: Stackable Signal Tower Light / Indicator Series: ABB NSL Model: NSL31E-88 Application: Visual signaling in industrial control, automation, and process systems Mounting: Panel mount or pole mount, stackable modular assembly Electrical Characteristics Rated Voltage: 24 V AC/DC, 110 V AC, or 230 V AC (depending on variant) Power Consumption: 1–5 W per module (LED), 3–5 W per module (incandescent) Light Source: LED or incandescent (depending on model) Color: Red (88 indicates red color), other colors available in the NSL series Current Draw: Typically 20–40 mA (LED), higher for incandescent Mechanical & Construction Housing Material: Polycarbonate or thermoplastic Lens Type: Transparent or diffused for clear visibility Module Diameter: Standard 31 mm for NSL31 series Stackable Height: Modular, up to several modules stacked Protection Class: IP65 (front), IP20 (rear) Environmental Conditions Operating Temperature: –25 °C to +55 °C Storage Temperature: –40 °C to +70 °C Humidity: 0–95% RH, non-condensing Standards & Certifications Standards Compliance: IEC 60947-5-1 Safety & EMC: CE marked, industrial-grade EMC compliance Approvals: UL, CSA depending on region Features Stackable modular design for multi-level signaling High-visibility LED or incandescent options Durable and robust construction for industrial environments Compact module size compatible with NSL31 series Easy installation and maintenance