Federal Signal AD-56-7 - Intercom, 24VDC, T/L Switch, Volume Control, Microphone Ready
Federal Signal

AD-56-7

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

UPC: 782979205524


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Installation InstructionsLine DrawingSpecification SheetWarranty

Contact for Pricing

Overview

The Federal Signal AD-56-7 industrial intercom delivers reliable 24VDC-powered two-way communication for harsh environments. Featuring a built-in Talk/Listen (T/L) switch for clear audio switching and an integrated volume control for optimal sound levels, this unit ensures dependable voice interaction in warehouses, factories, and control rooms. The microphone-ready design simplifies installation by supporting external microphones without additional hardware. Housed in a durable enclosure, the AD-56-7 resists dust, moisture, and mechanical shock, meeting stringent industrial standards for long-term performance. Its compact footprint and straightforward wiring enable easy retrofitting into existing systems, reducing downtime during deployment. Compatible with standard 24VDC power supplies, the unit integrates seamlessly into industrial communication networks while minimizing maintenance requirements. Federal Signal’s reputation for rugged, high-quality communication solutions ensures consistent operation in demanding applications where reliable voice communication is critical.
  • 24VDC operation for industrial power compatibility
  • Built-in Talk/Listen (T/L) switch for clear two-way communication
  • Integrated volume control for optimal audio levels
  • Microphone-ready design for flexible external audio input
  • Compact, durable housing resists dust, moisture, and shock

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
Length
5.03 IN
Mounting
Wall
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
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
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
Intercom, 24VDC, T/L Switch, Volume Control

AD-56

Intercom, 24VDC, T/L Switch, Volume Control
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.
Atkinson Dynamics Wall Mount Intercom, 24VDC, Secondary Unit - 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-56D

Atkinson Dynamics Wall Mount Intercom, 24VDC, Secondary Unit - 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.
Intercom, 24VDC-120VAC, T/L Switch, Volume Control, Hazardous Location

AD-28X-MV

Intercom, 24VDC-120VAC, T/L Switch, Volume Control, Hazardous Location
Atkinson Dynamics Wall Mount Intercom, 24VDC, Primary Unit - 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

Atkinson Dynamics Wall Mount Intercom, 24VDC, Primary Unit - 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.
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.

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.
AudioMaster Two-Way Intercom, UL and cUL, Multi-voltage 24VDC or 120-240VAC

310-MV

AudioMaster Two-Way Intercom, UL and cUL, Multi-voltage 24VDC or 120-240VAC
AudioMaster Two-Way Intercom, Hazardous Location, UL and cUL CID2, Multi-voltage 24VDC or 120-240VAC

310X-MV

AudioMaster Two-Way Intercom, Hazardous Location, UL and cUL CID2, Multi-voltage 24VDC or 120-240VAC
Intercom, 12VDC, T/L Switch, Volume Control, Call Button

AD-26A

Intercom, 12VDC, T/L Switch, Volume Control, Call Button
Intercom, 12VDC, T/L Switch, Volume Control, Pre-Amp Equipped, remote Volume Control equipped

AD-26-8-M44

Intercom, 12VDC, T/L Switch, Volume Control, Pre-Amp Equipped, remote Volume Control equipped
Intercom, 12VDC, T/L Switch, Volume Control, Foot Pedal Ready

AD-26-2

Intercom, 12VDC, T/L Switch, Volume Control, Foot Pedal Ready
Intercom, 12VDC, T/L Switch, Volume Control, Remote Power

AD-26-1

Intercom, 12VDC, T/L Switch, Volume Control, Remote Power

Frequently Asked Questions

What are the main applications for these intercoms?

These intercoms are designed for single-channel, two-way indoor and outdoor communication applications.

What power options are available for the intercoms?

The intercoms are available in 12VDC, 24VDC, 120VAC, or 240VAC 50/60Hz models.

What is the operating voltage for the AD-56 model?

The AD-56 model operates on 24VDC.

What is the operating current for the AD-56 intercom?

The AD-56 model has an operating current of 1.65 A and a standby current of 100 mA.

What is the speaker rating of the intercom?

The intercom features a 25-watt speaker.

What is the operating temperature range?

The operating temperature range is -31°F to 150°F (-35°C to 66°C).

What type of enclosure does the intercom have?

The intercom features a Type 4X enclosure with a corrosion-resistant cast aluminum housing and powder coat finish.

What are the dimensions of the intercom unit?

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

What certifications do these intercoms hold?

These heavy-duty units are UL and cUL listed, CSA Certified, and Marine rated.

What is the net weight of the intercom?

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

How to Install the AD-56-7 Intercom

This guide provides step-by-step instructions for installing and configuring the AD-56-7 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

  1. Select the mounting location

    Choose a flat and rigid surface for mounting the intercom. Ensure the location is accessible for wiring and maintenance.

  2. Mount the intercom

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

  3. Connect the power supply

    Plug the intercom into a nearby power source. For the AD-56-7 model, connect the black wire to +DC power, the white wire to common, and the green wire to earth ground.

  4. Wire the audio connections

    Connect the audio inputs in parallel using appropriate audio cables. Ensure the cables are sized correctly for your installation.

  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 intercom

    Once all connections are made, restore power and test the intercom system by pressing the talk switch and speaking into the microphone.

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.