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Description

The Allen-Bradley 855T-B24TL4 is a 70 mm Control Tower Stack Light LED module in the Bulletin 855T series, manufactured by Rockwell Automation. This part is also referenced without dashes as 855TB24TL4. Note: Rockwell Automation discontinued this product on October 1, 2019; the designated functional replacement is the 856T-BT4. Refer to manufacturer documentation to confirm compatibility with your specific application.

This module produces a steady red signal using an integrated LED light source — no replaceable bulb is included or required. It operates on Twenty-Four (24) Volts AC/DC full voltage, drawing 45 mA with a maximum power consumption of 7W. The black housing features a red colored lens and uses socket-mount installation, designed for modular stacking within 70 mm 855T series assemblies on compatible standard or DeviceNet bases (e.g., 855T-BSB, 855T-BCB, 855T-BPM10, 855T-BPM25, 855T-BPM40).

All 855T light modules are capable of absorbing up to 3 mA of leakage current from solid-state outputs without unintended module activation. Up to five light modules can be mounted on a single 855T DeviceNet base.

Technical Specifications

Brand: Allen-Bradley (Rockwell Automation)
MPN: 855T-B24TL4
Type: Stack Light LED Module
Series: Bulletin 855T — 70 mm Control Tower Stack Lights
Housing Color: Black
Lens Color: Red
Light Source: Steady LED (no replaceable bulb)
Operating Voltage: 24V AC/DC Full Voltage
Current Consumption: 45 mA
Maximum Power: 7W
Mounting Style: Socket Mount (modular stack)
Stack Diameter: 70 mm
IP Rating: IP65/IP66
NEMA Rating: 4/4X/13
Operating Temperature: -25°C to +70°C
Leakage Current Absorption: Up to 3 mA without activation
Lifecycle Status: Discontinued (October 1, 2019)
Functional Replacement MPN: 856T-BT4
Weight: 0.25 lbs
Country of Manufacture: United States

Condition: Used. This part was removed from a working production environment. This is a multi-qty listing. May have some light scratches etc. No breaks or cracks

Shipping & Handling

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Returns

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About ACME MRO Solutions

We started ACME MRO Solutions to fix something we kept running into as contractors — plants down, parts slow, surplus listings you couldn't trust. Our goal is simple: get YOU the right component fast, with an honest description, so you can get back to running.

We describe what we see. Used items show signs of use; if a part has visible wear, damage, or a missing component, the condition description will say so. We don't claim anything is tested unless we tested it — and we don't bench-test parts where testing isn't practical or revealing (feed-through modules, breakers, mechanical components). When we do test something, we'll say so explicitly.

If something is our fault, we don't work through it — we make it right. We are proud to serve American manufacturing. Your uptime is our bottom line.

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Questions? Talk to us.

Send a message through eBay. During business hours we typically respond within the hour. Whether you need to confirm compatibility before buying, request additional photos, ask about a cross reference, or work through something after delivery — message first and we'll figure it out together.