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A-B 855H-BCD24EDR4 Stack Light Module

A-B 855H-BCD24EDR4 Stack Light Module

A-B 855H-BCD24EDR4 Stack Light Module

  • Item NO.:

    855H-BCD24EDR4
  • Payment:

    T/T
  • Price:

    $365
  • Product Origin:

    USA
  • Color:

    NEW
  • Product weight:

    0.01KG
  • Lead Time:

    In stock

We will arrange delivery within 3-5 days after receiving the payment.

Our express delivery: DHL and FedEx.Quality packing for each product

                                                                                                                                                                                                                                                                    • A-B 855H-BCD24EDR4 Stack Light Module

                                                                                                                                                                                                                                                                       

                                                                                                                                                                                                                                                                       

                                                                                                                                                                                                                                                                      The Allen-Bradley 855H-BCD24EDR4 is not a traditional stack light module, but an industrial horn + beacon (audible + visual alarm device) from the 855H signaling series.


                                                                                                                                                                                                                                                                      Product Information

                                                                                                                                                                                                                                                                      • Brand: Allen-Bradley (Rockwell Automation)
                                                                                                                                                                                                                                                                      • Series: 855H Industrial Signaling Devices
                                                                                                                                                                                                                                                                      • Part Number: 855H-BCD24EDR4
                                                                                                                                                                                                                                                                      • Type: Horn + Beacon (Audio + Flashing Light Alarm)
                                                                                                                                                                                                                                                                      • Voltage: 24V DC
                                                                                                                                                                                                                                                                      • Function: Audible alarm + red strobe warning signal

                                                                                                                                                                                                                                                                      Electrical / Performance Data

                                                                                                                                                                                                                                                                      • Supply voltage: 24V DC
                                                                                                                                                                                                                                                                      • Sound level: up to ~124–126 dB (adjustable tones)
                                                                                                                                                                                                                                                                      • Light: Red xenon/LED strobe beacon (5 Joule flash type)
                                                                                                                                                                                                                                                                      • Protection rating: IP66 / NEMA 4X industrial enclosure
                                                                                                                                                                                                                                                                      • Operating temperature: approx. -25°C to +55°C range

                                                                                                                                                                                                                                                                      Function (Simple Explanation)

                                                                                                                                                                                                                                                                      This device combines two warning functions:

                                                                                                                                                                                                                                                                      • Horn (sound alarm): alerts operators with loud buzzer tones
                                                                                                                                                                                                                                                                      • Beacon (light alarm): red flashing strobe for visual warning

                                                                                                                                                                                                                                                                      It is used when machines need urgent status indication or safety alerts.


                                                                                                                                                                                                                                                                      System Role

                                                                                                                                                                                                                                                                      It is typically connected to:

                                                                                                                                                                                                                                                                      • PLC output modules (relay / transistor output)
                                                                                                                                                                                                                                                                      • Safety PLC / safety relay systems
                                                                                                                                                                                                                                                                      • Alarm circuits in machines

                                                                                                                                                                                                                                                                      It does not process signals — it only indicates status.


                                                                                                                                                                                                                                                                      Typical Applications

                                                                                                                                                                                                                                                                      • Machine fault alarm systems
                                                                                                                                                                                                                                                                      • Production line warning signals
                                                                                                                                                                                                                                                                      • Safety shutdown indication
                                                                                                                                                                                                                                                                      • Conveyor / packaging alarm systems
                                                                                                                                                                                                                                                                      • Industrial automation warning towers
                                                                                                                                                                                                                                                                      • Emergency status signaling

                                                                                                                                                                                                                                                                      Key Features

                                                                                                                                                                                                                                                                      • High decibel industrial horn
                                                                                                                                                                                                                                                                      • Bright red flashing beacon
                                                                                                                                                                                                                                                                      • Multiple selectable tones (up to dozens of patterns)
                                                                                                                                                                                                                                                                      • Rugged IP66 / 4X enclosure for harsh environments
                                                                                                                                                                                                                                                                      • Integrated audible + visual warning in one unit
                                                                                                                                                                                                                                                                      • Suitable for outdoor and industrial use

                                                                                                                                                                                                                                                                      Precautions

                                                                                                                                                                                                                                                                      • Very loud output — avoid close-range installation near operators
                                                                                                                                                                                                                                                                      • Must use correct 24V DC stable power supply
                                                                                                                                                                                                                                                                      • Not a stack light segment module (it is a combined horn/beacon unit)
                                                                                                                                                                                                                                                                      • Ensure proper mounting to avoid vibration damage
                                                                                                                                                                                                                                                                      • Follow local noise regulations in workplace environments

The structure and details of the product:

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