Federal Signal AD-27-4 - Intercom, 120VAC, T/L Switch, Volume Control, Extreme Conditions
Federal Signal

AD-27-4

Alternate Item Number: ad-27-atkinson-dynamics-intercom

UPC: 782979204800


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Overview

The Federal Signal AD-27-4 is a 120VAC industrial intercom designed for harsh environments. It features an integrated Talk/Listen (T/L) switch for easy mode toggling between transmitting and listening, ensuring efficient communication in factories, warehouses, or field operations. The built-in volume control maintains clear audio levels even in noisy settings. Engineered to withstand extreme temperature and humidity fluctuations, this unit is suitable for outdoor installations, industrial sites, and high-stress applications. The AD-27-4 meets stringent durability standards with a robust design that reduces downtime and maintenance costs. With a voltage rating of 120VAC, it integrates seamlessly into standard industrial power systems. Federal Signal’s reputation for reliability ensures consistent performance in critical communication scenarios, making it ideal for safety coordination, operational efficiency, and dependable voice links in demanding environments.
  • 120VAC power rating for standard industrial systems
  • Integrated T/L (Talk/Listen) switch for easy mode toggling
  • Built-in volume control for clear audio in noisy environments
  • Engineered for extreme temperature and humidity fluctuations
  • Suitable for outdoor, factory, and warehouse installations

Specifications

-31 to 150
DEG F
5.03
IN
6.5
in
9.88
IN
Application
Indoor/Outdoor
Brand Name
Federal Signal
Enclosure
Type 4X
Frequency Response
320 Hz - 8.0 kHz
Height
9.88 IN
Length
5.03 IN
Mounting
Wall
Number Of Lines
One
Operating Current
0.24 AMP
Operating Temperature
-31 to 150 DEG F
Operating Temperature, Maximum
150 F
Operating Temperature, Maximum
65.5556 C
Operating Temperature, Minimum
-31 F
Operating Temperature, Minimum
-35 C
Operating Voltage
120VAC
Series
AD-27
Special Features
Balanced Line Output
Standard
UL Listed/cUL Listed/CSA Certified/Marine Listed
Standard
CSA,Marine,UL,cUL
Sub Brand
Atkinson Dynamics
Type
Wall Mount Intercom
Type
Intercoms
Voltage Rating
120 VAC
Width
6.5 IN
Package Dimensions (L x W x H)
8.13 IN x 7.25 IN x 15.13 IN
Package Dimensions (L x W x H)
20.6502 cm x 18.415 cm x 38.4302 cm
Package Weight (Imperial)
10.700 L
Package Weight (Metric)
4.854 kg
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AD-27A-3-4

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Frequently Asked Questions

What type of communication is the AD-27 intercom designed for?

The AD-27 is a wall-mount intercom designed for single-channel, two-way indoor and outdoor communication applications.

What are the power requirements for the AD-27 model?

The AD-27 model operates on 120VAC 50/60Hz. It has an operating current of 240 mA and a standby current of 83 mA.

Can the AD-27 intercom be used outdoors?

Yes, the AD-27 is a heavy-duty industrial intercom designed for both indoor and outdoor applications. It features a Type 4X enclosure and is Marine rated.

What is the speaker rating for the AD-27 intercom?

The AD-27 intercom is equipped with a 25-watt speaker.

What is the operating temperature range for the intercom?

The intercom can operate in temperatures ranging from -31°F to 150°F (-35°C to 66°C).

What are the physical dimensions of the AD-27 intercom?

The intercom has a height of 9.88 inches, a width of 6.50 inches, and a depth of 5.03 inches.

What certifications and listings does the intercom have?

The intercoms are UL and cUL listed, CSA Certified, and Marine rated. They also feature a Type 4X enclosure.

What is the housing material and finish of the intercom?

The intercom features a corrosion-resistant cast aluminum housing with a rugged powder coat finish.

What is the frequency response of the AD-27 intercom?

The AD-27 intercom has a frequency response range of 320Hz to 8.0Khz.

What is the shipping weight of the AD-27 model?

The shipping weight for the AD-27 model is 10.7 lbs (4.85 kg).

How to Install the AD-27 Intercom System

This guide provides step-by-step instructions for installing and configuring the AD-27 intercom system, ensuring proper setup for effective communication.

Estimated time: 45m

Tools needed:

Screwdriver, Wire strippers, Multimeter

Supplies needed:

Mounting screws, Terminal connectors, 1K, 1W resistor (optional)

  1. Select the mounting location

    Choose a flat and rigid surface for mounting the intercom, ensuring it can support the weight of the unit.

  2. Mount the intercom

    Secure the intercom to the selected surface using the two mounting ears and appropriate screws. Ensure it is level and firmly attached.

  3. Connect the power supply

    Plug the intercom into a nearby power source. For AC models, connect the hot wire to the black terminal, neutral to the white terminal, and ground to the green terminal.

  4. Wire the audio connections

    Connect the audio inputs in parallel using properly sized audio wires. Optionally, install the 1K, 1W resistor across the audio lines to reduce noise.

  5. Test the installation

    After completing the wiring, restore power and test the intercom system to ensure all connections are functioning correctly.

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.