Federal Signal 504WB-120 - Vibrating Bell Assembly, 4", Weatherproof Back Box, UL and cUL, 120VAC
Federal Signal

504WB-120

Alternate Item Number: 504wb-506wb

UPC: 782979200987


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Installation InstructionsLine DrawingSpecification SheetWarranty

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Overview

The Federal Signal 504WB-120 Vibrating Bell Assembly is a compact, 4-inch industrial signaling device designed for reliable high-volume alerts in commercial and industrial environments. Operating on 120 VAC, it integrates seamlessly with standard industrial power systems, delivering a robust 98 dBa output at 10 feet (108 dBa at 1 meter). The unit features a Type 3R weatherproof back box, protecting internal components from dust, moisture, and temperature extremes ranging from -31°F to 150°F (-35°C to 66°C). Certified to UL and cUL standards, the 504WB-120 ensures compliance with safety regulations for use in factories, warehouses, utility facilities, and other demanding applications. Its heavy-duty, powder-coated housing and tempered gong provide long-lasting durability with minimal maintenance. The assembly includes an internal terminal block for simplified wiring, allowing uninterrupted single-run installations. With a net weight of 1.05 lbs (0.48 kg) and dimensions of 4.73" depth x 5.64" width, the compact design fits easily into tight spaces while delivering consistent, clear sound cues for alarms, status updates, or safety warnings.
  • 4" vibrating bell assembly with tempered gong for superior sound output
  • 98 dBa @ 10' (108 dBa @ 1m) for clear, high-volume alerts
  • 120 VAC operation with 0.08 amp current draw
  • Type 3R weatherproof back box protects against dust, moisture, and extreme temperatures
  • UL and cUL certified for safety compliance in industrial environments

Specifications

-31 to 150
DEG F
0.08
AMP
108
dBa
5.64 H x 5.64 W x 4.73 D
IN
98
dBa
Application
Indoor/Outdoor
Brand Name
Federal Signal
Color
Gray
dBa at 10ft
98 dBa
dBa at 1M
108 dBa
Dimensions
5.64 H x 5.64 W x 4.73 D IN
Enclosure
Type 3R
Loudness
98 DB
Mounting
Surface
Operating Current
0.08 AMP
Operating Temperature
-31 to 150 DEG F
Operating Voltage
120VAC
Special Features
Includes Gong, Vibrating Mechanism And Back Box
Standard
CSA,UL,cUL
Standard
UL Listed/cUL Listed/CSA Certified
Sub Brand
Vibratone
Type
Audible Signals
Package Dimensions (L x W x H)
7.83 IN x 5.75 IN x 6.25 IN
Package Dimensions (L x W x H)
19.8882 cm x 14.605 cm x 15.875 cm
Package Weight (Imperial)
1.650 L
Package Weight (Metric)
0.748 kg
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Frequently Asked Questions

What is included with the 504WB-120 bell assembly?

The 504WB-120 bell assembly includes the gong, vibrating AC mechanism, and a gasketed back box. It features heavy-duty, industrial-grade housing.

What is the operating voltage for the 504WB-120?

The 504WB-120 operates on 120VAC.

What is the gong size of the 504WB-120 model?

The 504WB-120 model features a four-inch gong.

What is the decibel output of the 504WB-120?

The 504WB-120 produces 98 dBa at 10 feet and 108 dBa at 1 meter.

What type of enclosure does the 504WB-120 have?

The 504WB-120 features a Type 3R enclosure.

What certifications does the 504WB-120 have?

The 504WB-120 is CSA Certified and UL and cUL Listed.

What is the operating current for the 504WB-120?

The operating current for the 504WB-120 is 0.08 amps at 120VAC.

What is the operating temperature range for the 504WB-120?

The 504WB-120 operates in temperatures ranging from -31°F to 150°F (-35°C to 66°C).

What is the recommended duty cycle for the bell?

The recommended duty cycle for the bell is 5 minutes ON followed by 5 minutes OFF.

What is the net weight of the 504WB-120?

The net weight of the 504WB-120 is 1.05 lbs (0.48 kg).

How to Install the 504WB Vibratone Bell

This guide provides step-by-step instructions for installing and wiring the 504WB Vibratone Bell safely and effectively.

Estimated time: 45m

Tools needed:

Screwdriver, Wire strippers, Multimeter

Supplies needed:

Mounting screws, Terminal connectors

  1. Prepare the mounting location

    Use the rear enclosure of the bell as a template to mark the location of the mounting ears on the mounting surface. Ensure the area is clear of obstructions.

  2. Mount the bell

    Secure the bell to the mounting surface using user-supplied fasteners suitable for the mounting surface. Ensure the bell is level and firmly attached.

  3. Connect the supply wires

    Remove the four screws securing the bell to the rear enclosure and detach the bell. Attach the supply wires to the terminal block as shown in the provided diagrams, ensuring that stranded wires are twisted together before insertion.

  4. Reassemble the bell

    Reattach the bell to the rear enclosure using the screws that were removed earlier. Ensure all connections are secure.

  5. Perform a final check

    Before powering on, verify that all screws and connections are tight. Ensure the front of the gong is clear of any obstructions to optimize sound distribution.

Frequently Asked Questions about Federal Signal

What certifications and standards do Federal Signal products comply with?

Federal Signal products are certified across multiple international standards, including UL (Underwriters Laboratories) in the USA, CSA (Canadian Standards Association), CE (European Community), UKCA (United Kingdom), EAC (Russia), and C-Tick (Australia and New Zealand). Their products meet rigorous safety and performance standards for industrial environments, with specific compliance in electrical equipment enclosures, functional safety, and environmental protection ratings.

What is Federal Signal's warranty policy?

Federal Signal offers a comprehensive limited warranty covering most products for 1-5 years from the date of delivery, with specific terms varying by product category. Mechanical sirens, beacons, speakers, and sounders typically receive 5-year parts and labor coverage, while electronic sirens and controllers generally have 2-year warranties. All warranties require return to the factory for service, and on-site services are not included. Certain components like domes, lenses, lamps, and batteries are specifically excluded from warranty coverage.

What industries and applications are Federal Signal products used for?

Federal Signal products are used across multiple critical industrial and municipal sectors for notification, communication, and safety systems. Their product lines cover essential applications including fire alarm systems, public address and telephony, outdoor warning systems, visual and audible signals, and emergency communication networks. Key industries served include manufacturing, municipal emergency services, industrial facilities, and infrastructure environments where clear, reliable communication and safety signaling are paramount.

What technical support does Federal Signal offer?

Federal Signal offers comprehensive technical support through their dedicated [email protected] email and direct phone line at +1 708.534.4756. Their support covers a wide range of notification and communication solutions, including technical assistance for products in public address, telephony, fire alarm, visual and audible signals, outdoor warning systems, and intercoms.

What are the main product lines offered by Federal Signal?

Federal Signal offers comprehensive notification and communication solutions across multiple product lines, including Visual Signals, Audible Signals, Telephony, Intercoms, Fire Alarm, Outdoor Warning Systems, Public Address, and Initiating Systems. Their product range is designed to provide clear communications and critical process notifications that enhance safety and compliance in industrial and public environments.

What are the key features of Federal Signal products?

Federal Signal products are comprehensive notification solutions designed to enhance safety and communication across industrial environments. Their key features include visual and audible signals, fire alarm systems, outdoor warning systems, public address capabilities, telephony, and intercoms. These products provide critical process notifications, ensure safety compliance, and offer advanced technologies like secure encrypted communication, cloud-based control systems, and customizable emergency response interfaces.

What environmental ratings do Federal Signal products have?

Federal Signal products offer robust environmental ratings across multiple standards, including UL 508A, CSA, NEMA, and IEC 60529. Their enclosures are rated for Type 1, 2, 3, 4, 4X, 12, and 13 environments, with IP66 protection, and can operate in temperatures ranging from -40°F to 266°F. These ratings ensure superior protection against dust, water, corrosion, and extreme conditions for indoor and outdoor industrial applications.

What accessories are available for Federal Signal products?

Federal Signal offers multiple accessories for their signaling products, including coupling kits, cable entry adapters, indicator rings, legend plates, and mounting brackets. Key accessories include E-Box endcap kits with M20 and M25 openings, U-Brackets for dual configurations, and color-coded indicator rings in black, blue, green, magenta, red, and yellow. Additional options like adapters for NPT connections and specialized mounting hardware are also available for their Global Series signaling platforms.

What communication protocols do Federal Signal products support?

Federal Signal supports multiple industrial communication protocols including PROFIBUS DP, PROFINET, EtherNet/IP, CANopen, and Modbus RTU. These protocols enable flexible network integration across various industrial automation environments, supporting both traditional fieldbuses and modern Ethernet-based communication standards.

How are Federal Signal products typically installed?

Federal Signal products are typically installed using professional mounting configurations that include wall brackets, base stations, and specialized mounting hardware. Depending on the specific product line—such as outdoor warning systems, visual signals, or audible signals—installation involves precise mounting options like wall-mount antenna brackets, base station radio packages, and modular component assemblies. Each product configuration includes specific mounting accessories like endcaps, adapters, and terminal blocks to ensure secure and compliant installation in industrial and safety-critical environments.