Federal Signal AD-26D-1 - Intercom, 12VDC, T/L Switch, Volume Control, Secondary Unit, Remote Power
Federal Signal

AD-26D-1

Alternate Item Number: ad-26-atkinson-dynamics-intercom

UPC: 782979205531


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Installation InstructionsLine DrawingSpecification SheetWarranty

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Overview

The Federal Signal AD-26D-1 is a 12VDC secondary intercom unit designed for industrial communication systems. It features a built-in T/L (Talk/Listen) switch for seamless mode toggling, enabling clear two-way communication in noisy environments. The integrated volume control knob allows precise audio level adjustment to match site acoustic conditions. As a secondary unit, it mounts behind a primary intercom for a space-saving setup. Remote power capability supports flexible deployment in locations with limited power access, ideal for factories, warehouses, and utility sites. The unit operates on 12VDC, aligning with standard industrial power supplies, and is constructed for durability in demanding conditions. With easy-to-use controls and reliable performance, the AD-26D-1 ensures long-term durability and clear communication for maintenance crews, safety personnel, and operations managers.
  • 12VDC operation for compatibility with industrial power supplies
  • Built-in T/L switch for easy talk/listen mode toggling
  • Integrated volume control for precise audio adjustment
  • Remote power capability for flexible installation
  • Secondary unit design for space-saving behind primary intercom

Specifications

-31 to 150
DEG F
12
VDC
12 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
1.47 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
12VDC
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
12 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, 12VDC, T/L Switch, Volume Control, Call Button

AD-26A

Intercom, 12VDC, T/L Switch, Volume Control, Call Button
VIDEO OUT STA W/KYPD W/ID CARD RDR

M21351K-A

VIDEO OUT STA W/KYPD W/ID CARD RDR

Frequently Asked Questions

What are the available power options for these intercoms?

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

Can these intercoms be used outdoors?

Yes, these heavy-duty industrial intercoms are designed for both indoor and outdoor applications. They feature a Type 4X enclosure and a rugged powder coat finish.

What is the speaker's power rating?

The intercoms are equipped with a reliable 25-watt speaker.

What are the operating temperature limits?

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

What are the physical dimensions of the intercom?

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 have?

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

What is the net weight of the intercom unit?

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

What type of communication do these intercoms provide?

These intercoms provide single-channel, two-way communication.

What is the frequency response of the intercoms?

The frequency response for all models is 320Hz - 8.0Khz.

What is the operating current for the AD-26 model?

The AD-26 model operates on 12VDC and has an operating current of 1.47 A.

How to Install the Atkinson Dynamics AD-26D-1 Intercom

This guide provides step-by-step instructions for the installation and initial setup of the Atkinson Dynamics AD-26D-1 intercom system.

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, 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, neutral, and ground wires according to the power connection diagram.

  4. Wire the audio connections

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

  5. Verify connections

    Use a multimeter to check the voltage and ensure all connections are secure and correct before powering on the unit.

  6. Power on the intercom

    Turn on the power supply and test the intercom functionality by pressing the talk/listen 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.