Federal Signal AD-56D-4 - Atkinson Dynamics Wall Mount Intercom, 24VDC, Secondary Unit, Extreme Conditions - Available in 12VDC, 24VDC, 120VAC or 240VAC. Heavy-duty industrial intercom for indoor or outdoor applications. Single channel, two-way communications. Integrated volume control and Talk/Listen switch. Balanced line output. 25 watt speaker. Cast aluminum housing with rugged powder coat finish. Conformal coated PCB. Type 4X enclosure. Marine Listed. CSA Certified. UL and cUL Listed.
Federal Signal

AD-56D-4

Alternate Item Number: ad-56-atkinson-dynamics-intercom

UPC: 782979206934


Documents & Media
Installation InstructionsLine DrawingSpecification SheetWarranty

Contact for Pricing

Overview

Federal Signal’s AD-56D-4 Atkinson Dynamics Wall Mount Intercom is a rugged, secondary unit engineered for extreme indoor and outdoor industrial environments. This 24VDC-powered intercom delivers reliable two-way communication with integrated volume control and a Talk/Listen switch for hands-free operation. The unit features a cast aluminum housing with a rugged powder coat finish, providing superior durability against corrosion, moisture, and mechanical impact. Its conformal-coated PCB and Type 4X NEMA enclosure ensure protection against dust, water ingress, and harsh weather, meeting stringent marine and industrial standards. Certified by CSA, UL, and cUL, the AD-56D-4 is marine-listed and suitable for facilities requiring compliance with safety and environmental regulations. The 25-watt speaker and balanced line output deliver clear, distortion-free audio, making it ideal for factories, warehouses, outdoor control rooms, and maritime applications. Available in multiple voltage configurations (12VDC, 24VDC, 120VAC, or 240VAC), this intercom offers flexibility for diverse power requirements. Designed for easy wall mounting, the AD-56D-4 combines simplicity, reliability, and compliance in a single, heavy-duty package.
  • 24VDC power input with optional 12VDC, 120VAC, or 240VAC configurations
  • Type 4X NEMA enclosure for protection against dust, moisture, and corrosion
  • 25-watt speaker with balanced line output for clear two-way communication
  • Cast aluminum housing with rugged powder coat finish for durability
  • Marine-listed, CSA, UL, and cUL certified for compliance in harsh environments

Specifications

-31 to 150
DEG F
24
VDC
24 Vdc
V
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
IP Rating
IP66
Ip Rating
IP66/IP67
Length
5.03 IN
Material
Cast Aluminum
Mounting
Wall
Mounting Type
Wall Mount
Nema Rating
Type 4X
Number Of Lines
One
Operating Current
1.65 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
24VDC
Series
AD
Series
AD-56D
Special Features
Balanced Line Output
Standard
CSA,Marine,UL,cUL
Standard
UL Listed/cUL Listed/CSA Certified/Marine Listed
Sub Brand
Atkinson Dynamics
Type
Intercoms
Type
Wall Mount Intercom
Voltage Rating
24 Vdc
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)
10.000 L
Package Weight (Metric)
4.536 kg
Atkinson Dynamics Wall Mount Intercom, 24VDC, Primary Unit, Microphone Ready - Available in 12VDC, 24VDC, 120VAC or 240VAC. Heavy-duty industrial intercom for indoor or outdoor applications. Single channel, two-way communications. Integrated volume control and Talk/Listen switch. Balanced line output. 25 watt speaker. Cast aluminum housing with rugged powder coat finish. Conformal coated PCB. Type 4X enclosure. Marine Listed. CSA Certified. UL and cUL Listed.

AD-56C-7

Atkinson Dynamics Wall Mount Intercom, 24VDC, Primary Unit, Microphone Ready - Available in 12VDC, 24VDC, 120VAC or 240VAC. Heavy-duty industrial intercom for indoor or outdoor applications. Single channel, two-way communications. Integrated volume control and Talk/Listen switch. Balanced line output. 25 watt speaker. Cast aluminum housing with rugged powder coat finish. Conformal coated PCB. Type 4X enclosure. Marine Listed. CSA Certified. UL and cUL Listed.
MINI OS WITH ID CARD READER_AL

M21312P1-A

MINI OS WITH ID CARD READER_AL

Frequently Asked Questions

What is the power requirement for the AD-56 intercom?

The AD-56 model operates on 24VDC. It has an operating current of 1.65 A and a standby current of 100 mA.

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 dimensions of the AD-56 intercom?

The AD-56 intercom has a height of 9.88 inches, a width of 6.50 inches, and a depth of 5.03 inches.

What is the speaker rating for this intercom?

The intercom is equipped with a 25-watt speaker.

What certifications does the AD-56 intercom have?

The AD-56 intercom is UL and cUL listed, CSA Certified, and Marine rated.

What is the frequency response of the AD-56?

The AD-56 model has a frequency response range of 320Hz to 8.0Khz.

What is the net weight of the AD-56 intercom?

The net weight of the AD-56 intercom is 9 lbs (4.08 kg).

What are the key features of the AD-56 intercom?

It's a heavy-duty industrial intercom for indoor/outdoor, single-channel, two-way communication with integrated volume control and a Talk/Listen switch. It also features a 25-watt speaker and a Type 4X enclosure.

What type of housing does the intercom use?

It features a corrosion-resistant cast aluminum housing with a rugged powder coat finish, classified as a Type 4X enclosure.

Does the AD-56D model support hands-free operation?

Yes, the 'D' optional feature for the AD-56 allows hands-free operation and defaults to Talk mode.

How to Install the AD-56D-4 Intercom

This guide provides step-by-step instructions for installing and configuring the AD-56D-4 intercom system, ensuring proper wiring and setup for optimal performance.

Estimated time: 45m

Tools needed:

Screwdriver, Wire strippers, Multimeter

Supplies needed:

Mounting screws, 1K, 1W resistor, Audio cables, Terminal connectors

  1. Select the mounting location

    Choose a flat and rigid surface for mounting the intercom, ensuring it can support the weight of the unit. Consult with the facilities and safety engineer for optimal placement.

  2. Mount the intercom

    Secure the intercom to the selected surface using the provided mounting screws through the mounting ears. Ensure the unit is level and firmly attached.

  3. Connect the power supply

    Plug the intercom into a nearby power source. For DC models, connect the black wire to +DC power and the white wire to common. For AC models, connect the hot wire to the appropriate terminal and the neutral wire to common.

  4. Wire the audio connections

    Connect the audio inputs in parallel using the appropriate audio cables. Ensure the cables are sized correctly for your application, typically using 16-20 gauge low voltage audio cable.

  5. Install the resistor

    If necessary, install the included 1K, 1W resistor across the audio lines to reduce noise. Only one resistor is needed for the entire system.

  6. Test the installation

    After completing the wiring, restore power to the intercom and test the functionality by pressing the talk switch and verifying audio transmission.

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.