Federal Signal 55-120-1BK - Resonating Horn, 120VAC, Black - Available in 24VAC and 120VAC. Produces 105 dBa at 10 feet (115 dBa at 1m). Indoor/outdoor use. Corrosion resistant cast aluminum housing and spun brass projector. Weatherproof, water- and dust-tight. Swivel bracket included. Type 3R enclosure. Model 55 (120VAC) is UL Listed and CSA Certified.
Federal Signal

55-120-1BK

Alternate Item Number: 55-and-56-resonating-horns

UPC: 782979224358


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Overview

The Federal Signal 55-120-1BK Resonating Horn (SKU 55-120-1BK) is a high-output audible warning device designed for industrial, commercial, and municipal applications requiring reliable, high-decibel alerts. This 120VAC horn delivers a powerful 105 dBa sound output at 10 feet (115 dBa at 1 meter), ensuring clear auditory warnings even in high-noise environments. The resonating horn design amplifies sound more effectively than standard vibrating horns, providing superior penetration through ambient noise for critical safety applications. Constructed with a corrosion-resistant cast aluminum housing and spun brass projector, the 55-120-1BK withstands harsh indoor and outdoor conditions, including exposure to moisture, dust, and mechanical impact. Its Type 3R weatherproof enclosure meets NEMA standards for protection against water and dust ingress, making it suitable for use in factories, construction sites, warehouses, and emergency response systems. The included swivel bracket enables flexible mounting orientations to optimize sound projection. Electrical specifications include a 120VAC, 60Hz input with a current draw of 0.75 amps. The horn operates on a 5-minute on/5-minute off duty cycle, preventing overheating during prolonged use. Housings are tapped for 1/2" conduit, simplifying installation into existing electrical systems. The 55-120-1BK is UL Listed and CSA Certified, ensuring compliance with rigorous safety and performance standards for industrial equipment. Ideal for safety interlocks, fire suppression systems, machine guarding, facility monitoring, and emergency evacuation protocols, this Federal Signal horn provides dependable performance in demanding environments. Its compact design and durable construction reduce maintenance requirements while delivering consistent, high-volume alerts when seconds count.
  • 120VAC, 60Hz operation with 0.75 amp current draw
  • 105 dBa at 10 feet (115 dBa at 1 meter) sound output
  • Corrosion-resistant cast aluminum housing and spun brass projector
  • Type 3R weatherproof, water- and dust-tight enclosure
  • Includes swivel bracket for flexible mounting; UL Listed and CSA Certified
  • UL Listed and CSA Certified for safety compliance
  • 5-minute on/5-minute off duty cycle for continuous operation
  • Housing tapped for 1/2" conduit for easy installation

Specifications

-35 to 150
DEG F
0.75
AMP
105
DB
8.0 H x 8.0 W x 19.75 L
IN
Application
Indoor/Outdoor
Brand Name
Federal Signal
Color
Black
Connection Type
1/2" Conduit
Current Rating
0.75 A
Dimensions
8.0 H x 8.0 W x 19.75 L IN
Enclosure
Type 3R
Frequency
60 Hz
IP Rating
IP66
Ip Rating
IP66/IP67
Loudness
105 DB
Material
Cast Aluminum, Spun Brass
Material
Cast Aluminum Housing/Spun Brass Projector
Mounting Type
Swivel Bracket
NEMA Rating
Type 3R
Operating Current
0.75 AMP
Operating Temperature
-35 to 150 DEG F
Operating Voltage
120VAC 60Hz
Series
Model 55
Series
55
Special Features
Resonated Column Of Air Generates Sound
Standard
UL Listed/CSA Certified
Type
Resonating Horn
Voltage Rating
120 VAC
Package Dimensions (L x W x H)
8.25 IN x 23.38 IN x 9.38 IN
Package Dimensions (L x W x H)
20.955 cm x 59.3852 cm x 23.8252 cm
Package Weight (Imperial)
6.200 L
Package Weight (Metric)
2.812 kg
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Frequently Asked Questions

What is the operating voltage for model 55-120-1?

The Federal Signal model 55-120-1 operates on 120VAC 60Hz.

What is the operating current for the 55-120-1 horn?

The operating current for model 55-120-1 is 0.75 amps.

What is the decibel output of the 55-120-1 horn?

Model 55-120-1 produces 105 dBa at 10 feet and 115 dBa at 1 meter.

What size conduit opening does the horn have?

The horn housings are tapped for a 1/2 inch conduit opening.

What is the operating temperature range for the horn?

The operating temperature range for the resonating horns is -35°F to 150°F (-37°C to 66°C).

What is the recommended duty cycle for the horn?

The recommended duty cycle for the horn is five minutes ON, followed by five minutes OFF.

Is the 55-120-1 model certified?

Yes, the Model 55-120-1 is UL Listed and CSA Certified.

Does the horn include a mounting bracket?

Yes, a swivel bracket is included with the horn.

What are the dimensions of the 55-120-1 horn?

The horn has a height of 8.0 inches, a width of 8.0 inches, and a length of 19.75 inches.

What is the net weight of the horn?

The net weight of the horn is 5.0 lbs (2.3 kg).

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.