Allen Bradley 2-Circuit Light/Sound Red 855T-B24DD4 /B

Allen Bradley 855T-B24DD4 2-Circuit Light/Sound Module

The Allen Bradley 855T-B24DD4 is a 70 mm stack light module designed to provide both visual and audible signals in industrial environments. This module features a steady incandescent red light combined with a piezo sounder, making it ideal for applications requiring clear status indication and alerting.

Key Features

• Visual Indication: Steady incandescent red light with a light output of 2.5 MSCP (31.4 lumens), ensuring high visibility in various lighting conditions.
• Audible Alert: Integrated piezo sounder with adjustable volume levels ranging from 88 dBa to 103 dBa, measured at a distance of 1 meter.
• Voltage Compatibility: Operates at 24V AC/DC (±10%), accommodating a range of industrial power systems.
• Durability: Constructed with a black polycarbonate housing, offering robust protection against environmental factors.
• Environmental Protection: Rated NEMA 4X and IP65, providing resistance to dust and water ingress, suitable for harsh industrial settings.
• Operating Conditions: Functions effectively within a temperature range of -25°C to 40°C, ensuring reliability in diverse environments.

Applications

The 855T-B24DD4 module is suitable for various industrial applications, including:

• Manufacturing facilities for machine status indication and alerting.
• Process control systems requiring clear visual and audible signals.
• Safety systems where immediate attention is necessary.

Specifications

• Lens Color: Red
• Outer Diameter: 70 mm
• Degree of Protection: NEMA 4X, IP65
• Recommended Wire Size: 0.5 mm²
• Recommended Terminal Torque: 0.8 Nm
• Shock Resistance: 35 G (for a 5-module stack)
• Vibration Resistance: 0.75 G (for a 5-module stack)
• Sound Module Rating: 20,000 hours
• Tone Frequency: Preset at 2400 Hz or 3300 Hz
• Lamp Life Rating: 7,000 hours
• Current Consumption: 65 mA at 24V AC/DC
• Leakage Current Impact: Can absorb up to 3 mA of leakage current from solid-state outputs without module activation
• Housing Color: Black
• Module Type: 2-circuit steady incandescent & sound
• Function Continuous Light: True
• Operating Temperature: -25°C to 40°C
• Storage Temperature: -40°C
• Materials: Polycarbonate housing

For detailed installation instructions and technical data, refer to the official documentation provided by the manufacturer.