Allen-Bradley 855T-B24DN3 – Stack Light Module

Allen-Bradley 855T-B24DN3 – 70 mm Stack Light Module (Green, Incandescent)

The Allen-Bradley 855T-B24DN3 is a modular Control Tower™ Stack Light Module designed for clear visual indication of machine status in industrial environments. This 70 mm diameter unit features a steady incandescent lamp with a green lens, ensuring high visibility. Operating on 24 V AC/DC and featuring a black housing, this module is a standard component for building custom signaling towers in applications requiring robust and reliable status indication.

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Quick Navigation

• About This Stack Light Module
• Applications
• Why ROMA Industrial Company
• Technical Specifications
• Key Features & Benefits

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About This Stack Light Module

This product is a module from the Allen-Bradley Bulletin 855T Control Tower series, commonly referred to as a **Tower Light** or **Signal Column**. It functions as a single light element within a stackable column, providing a continuous (steady) green light signal. Its modular design allows it to be combined with other light or sound modules (up to five high) to represent various machine states (e.g., Run, Stop, Fault). The 70 mm diameter is a standard industrial size, and the incandescent lamp provides a traditional, highly visible signal.

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Applications

This Stack Light Module is suitable for providing visual machine status in a variety of industrial environments, including:

• Manufacturing and Assembly Line Status Indication (e.g., “Ready” or “Safe”)
• Machine Tool Operation Monitoring (CNC machines)
• Process Control and Packaging Equipment
• Quality Control Stations

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Why ROMA Industrial Company

ROMA Industrial is your trusted partner for a full range of industrial supplies across categories like Motion Control & Mechatronics, Electrical & Automation, and Fluid Power & Control. We are committed to providing top-tier products and service to keep your operations running smoothly. We partner with world-class shipping providers like FedEx, DHL, and UPS to ensure fast and reliable delivery worldwide. We accept returns to fulfill your satisfaction and accept variable payments methods including PayPal, credit cards, and more. We are a supplier in Europe, USA, and Saudi Arabia.

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Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)
• Part Number: 855T-B24DN3
• Product Type: Stack Light Module / Tower Light
• Diameter: 70 mm
• Light Type: Steady Incandescent
• Lens Color: Green
• Housing Color: Black
• Voltage: 24 V AC/DC
• Power Rating: 7 W
• Current Draw: 0.271 A
• Protection Rating: IP66 (when properly installed)
• Weight: N/A

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Key Features & Benefits

• Clear Status Indication: Provides a steady green light signal for clear machine status communication.
• Modular Design: The 70 mm stackable module allows for easy customization and expansion of the signal tower.
• Wide Voltage Compatibility: Operates on standard 24 V AC/DC control voltage, simplifying integration.
• Durable Construction: Robust housing and high IP rating (IP66) ensure reliable performance in harsh industrial settings.