OVERVIEW

Official designation: Allen-Bradley 855T-B24TL3 (Bulletin 855T, Steady LED Light Module)

Role/Application: This 70 millimeter steady green LED light module provides clear, energy-efficient visual status indication for operational readiness and machine conditions within the modular Control Tower system.

KEY SPECS SUMMARY

Power: 24 Volts AC/DC Full Voltage

Interfaces / Ports: Internal terminal blocks

Indicators: Steady Green LED, 900 to 1800 mcd

Operating Temp: Minus 25 degrees C to plus 70 degrees C

Platform / Compatibility: 70 millimeter Bulletin 855T Stack Lights

Limit: 35 milliampere maximum current draw

Lifecycle: Discontinued by manufacturer 10/1/2019, Series C

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the estimated lifespan of the green LED light source in the 855T-B24TL3 module?

A: The green LED light source is rated for a typical lifespan of 100,000 hours.

Wiring & Installation:

Q: What is the recommended terminal torque and wire gauge for secure wiring connections?

A: Recommended terminal torque is 0.8 Newton meters using 18 to 22 AWG wire gauge.

Troubleshooting & Compatibility:

Q: What are the ingress protection and UL Type ratings for this stack light module?

A: The module is rated IP65 with UL Type 4/4X/13 protection for harsh environments.

Replacement & Upgrades:

Q: What is the maximum current that can leak from an output without activating the module?

A: The module offers leakage immunity, tolerating a maximum leakage current of 3 milliamperes.