Specifications General Type: Stackable Signal Tower Light / Indicator Series: ABB NSL Model: NSL40E-88 Application: Visual signaling in industrial control and automation systems Mounting: Panel mount, pole mount, or stackable modular assembly Electrical Characteristics Rated Voltage: 24 V AC/DC, 110 V AC, or 230 V AC (depending on variant) Power Consumption: 2–6 W per module (LED), 3–5 W per module (incandescent) Light Source: LED or incandescent (depending on model) Color: Red (88 indicates red), other colors available in the NSL series Current Draw: Typically 20–50 mA (LED), higher for incandescent Mechanical & Construction Housing Material: Polycarbonate or thermoplastic Lens Type: Transparent or diffused Module Diameter: 40 mm (NSL40 series) Stackable Height: Modular, supports multiple 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 construction for industrial environments Compact 40 mm module diameter for NSL40 series Easy installation and maintenance Compatible with ABB NSL series tower lights