OVERVIEW

Official designation: Allen-Bradley 855T-B24TL4 (Bulletin 855T, Steady LED Light Module)

Role/Application: This 70 millimeter steady red 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 Red LED, 900 to 2240 mcd

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

Platform / Compatibility: 70 millimeter Bulletin 855T Stack Lights

Limit: 29 milliampere maximum current draw

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

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the minimum and maximum luminous intensity ratings for the red steady LED?

A: The luminous intensity ranges between 900 mcd minimum and 2240 mcd maximum.

Wiring & Installation:

Q: What is the recommended terminal torque and corresponding wire size for secure electrical connections?

A: Recommended terminal torque is 0.8 Newton meters using 0.5 millimeter squared wire.

Troubleshooting & Compatibility:

Q: What is the maximum current leakage the light module can tolerate without false activation?

A: The steady LED module is designed to tolerate a maximum leakage current of 3 milliamperes.

Replacement & Upgrades:

Q: What is the expected service life for the light source and the ingress protection rating?

A: Service life is 100,000 hours, with an ingress protection rating of IP66.