Siemens 8WD4420-0EA Signalling Column Acoustic Module 24V DC 70mm

The Siemens 8WD4420-0EA is a high-performance 70mm diameter acoustic signalling module engineered for industrial automation and process control environments. As part of the SIRIUS 8WD modular system, this siren element provides reliable audible status indication, ensuring that operators are alerted to critical process changes or safety conditions. The device is designed to operate at 24V AC/DC and features a robust construction that withstands demanding industrial conditions, including exposure to shocks and vibrations.

Advantages

This acoustic module offers exceptional versatility through its ability to produce both continuous and modulated tones, allowing for distinct signalling patterns based on specific operational requirements. The unit is built with a high degree of protection, rated at IP65, which ensures reliable performance even in harsh environments where dust or moisture may be present. Installation is streamlined by a secure bayonet mechanism, which facilitates quick assembly and efficient replacement of components within a signalling column. Furthermore, the device allows for manual adjustments to both tone and volume, providing users with the flexibility to tailor the audible output to the specific noise levels of their facility.

Suitable for

• Industrial manufacturing lines
• Process control monitoring systems
• Safety and emergency warning installations
• Automated machinery status indication

This module may not be suitable for environments requiring extremely high-decibel output beyond the 95-105 dB range or for applications where a specific non-standard signal frequency is mandated by local safety regulations. It is also not intended for standalone use without the corresponding base and mounting components of the SIRIUS 8WD modular system.

Key specifications

• Diameter: 70 mm
• Operating voltage: 24 V AC/DC
• Sound pressure level: 95 - 105 dB
• Signal types: Continuous tone and modulated tone
• Protection rating: IP65
• Mounting system: Bayonet mechanism

The module is installed as part of a modular signalling column. Simply align the bayonet connection with the preceding module or base unit, insert, and twist to lock the component into place. Ensure that the electrical contacts are properly seated to maintain the IP65 seal. Once installed, the tone and volume can be adjusted according to the specific needs of the application using the integrated controls.

What to consider before purchase

• Verify that your existing signalling column base supports the 70mm diameter standard.
• Ensure the 24V AC/DC power supply is compatible with your current control cabinet configuration.
• Confirm that the required sound pressure level is appropriate for the ambient noise level of the installation area.

For optimal performance and longevity, ensure the module is mounted in a position that allows for clear sound propagation and is protected from direct high-pressure water jets, despite its IP65 rating.