Wheelock DSM-12/24-R Dual Sync Module

The Wheelock DSM-12/24-R is a dual synchronization module designed to synchronize compatible audible and visual notification appliances in commercial fire alarm systems. It provides synchronized Temporal Code 3 horn operation, synchronized strobe flash, and audible silence functionality while allowing visual notification appliances to continue operating after the audible devices have been silenced.

Designed for use with compatible Wheelock notification appliances, the DSM-12/24-R supports one Class A notification appliance circuit or two Class B notification appliance circuits while operating on either 12 VDC or 24 VDC systems. Its compact design makes it suitable for both new construction and retrofit fire alarm installations.

Product Functions

• Synchronizes horn operation
• Synchronizes strobe flash
• Supports audible silence operation
• Controls one Class A notification appliance circuit
• Controls two Class B notification appliance circuits
• Supports synchronized Temporal Code 3 signaling
• Supports synchronized carbon monoxide signaling with compatible appliances
• Allows multiple synchronization modules to be interconnected

Electrical & System Information

The DSM-12/24-R operates from either 12 VDC or 24 VDC regulated notification appliance circuits. It synchronizes compatible Wheelock notification appliances while allowing independent control of audible and visual outputs over a single wiring pair.

The module supports interconnection of up to twenty DSM modules with a maximum synchronization wiring distance of 1,000 feet using 18 AWG wire. Each notification appliance circuit is rated for up to 3.0 amperes.

Features

• Dual synchronization module
• Synchronizes horns and strobes
• Audible silence capability
• Temporal Code 3 synchronization
• Carbon monoxide notification support
• One Class A circuit
• Two Class B circuits
• 12 VDC operation
• 24 VDC operation
• Low operating current
• Screw terminal wiring
• Interconnect capability
• Commercial fire alarm application

Mounting & Design

The DSM-12/24-R mounts in a standard four and eleven sixteenths inch square electrical back box with a minimum depth of two and one eighth inches. It may be flush mounted or surface mounted depending on the installation requirements.

The compact module includes screw terminal connections for simplified field wiring and supports installation in new construction as well as retrofit projects.

Protection & Applications

Suitable for:

• Commercial Fire Alarm Systems
• Notification Appliance Synchronization
• Office Buildings
• Hospitals
• Healthcare Facilities
• Schools and Universities
• Hotels
• Government Buildings
• Industrial Facilities
• Warehouses
• Retail Buildings
• Institutional Facilities

Technical Specifications

Manufacturer: Wheelock

Parent Company: Eaton

Model: DSM-12/24-R

Product Type: Dual Synchronization Module

Operating Voltage: 12 VDC or 24 VDC

Average Current Draw: 20 mA at 12 VDC 35 mA at 24 VDC

Maximum Circuit Rating: 3.0 Amperes Per Circuit

Circuit Configuration: One Class A or Two Class B Notification Appliance Circuits

Synchronization: Horn and Strobe

Audible Silence: Supported

Maximum Interconnected Modules: 20

Maximum Sync Wiring Distance: 1000 Feet Using 18 AWG Wire

Mounting: Four and Eleven Sixteenths Inch Square Electrical Box Minimum Two and One Eighth Inches Deep

Application: Indoor Commercial Fire Alarm Systems

Listings: UL Listed, ULC Listed, FM Approved, and CSFM Listed. Verify product labeling, installation instructions, local codes, and project requirements before installation.

Applications

The Wheelock DSM-12/24-R is designed for commercial fire alarm systems requiring synchronized operation of compatible horns, strobes, and horn strobes. Typical applications include office buildings, hospitals, schools, hotels, industrial facilities, warehouses, retail centers, government buildings, and other commercial occupancies where synchronized notification and audible silence functionality are required.

DSM-12 24-R Datasheet