Overview
The Allen-Bradley 855T-B24TL8 is a Series C modular stack light indicator designed for industrial control towers and machine status display applications. This 70mm yellow steady LED module operates on 24V AC/DC and is housed in a durable black enclosure. Built for reliability in manufacturing, assembly, and automation environments, the 855T-B24TL8 provides clear visual feedback for machine operators and maintenance personnel. As a legacy product, it remains in demand for retrofit and replacement applications across legacy automation systems.
Key Features
- 70mm modular stack light design compatible with 855T series control towers
- Steady yellow LED output for persistent status indication
- 24V AC/DC dual voltage operation for flexible installation
- Black housing construction for industrial durability
- Socket mount connection for quick module replacement
- Series C engineering and component certification
Technical Specifications
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Model Number: 855T-B24TL8
- Series: C
- Module Type: Steady LED Light Module
- Color: Yellow
- Housing: 70mm Black
- Operating Voltage: 24V AC/DC
- Mounting Style: Socket Mount
- Product Category: Control Tower Stack Light
- Status: Discontinued by manufacturer (October 1, 2019)
- Weight: 0.20 lbs
Typical Applications
- Machine status indication on assembly lines and manufacturing cells
- Production machine condition alerts (warning, ready, run states)
- Press and injection molding machine safety indicators
- Automated warehouse and logistics control towers
- Industrial robot and automated guided vehicle (AGV) status displays
- Retrofit and replacement for legacy control tower systems
- Operator interface visibility in high-noise manufacturing environments
Compatibility & Replacements
Compatible With
- Allen-Bradley 855T series control towers and stack light bases
- 70mm modular stack light mounting systems
- 24V AC/DC industrial control circuits and PLC outputs
- Relay logic and discrete control systems
- Legacy automation platforms with 24V indicator requirements
Replaces / Drop-In Replacement For
- Series C 855T-B24TL8 yellow steady LED modules (exact replacement)
- Directly interchangeable within 855T series control tower assemblies
- Module-level replacements for failed or aging yellow indicator lights in existing towers
Works With
- 24V AC/DC industrial power supplies
- Allen-Bradley PLC discrete outputs
- Hardwired relay and contactor control circuits
- Industrial automation 24V signaling systems
- Legacy control systems predating EtherNet/IP and PROFINET adoption
