Bosch Security Systems 126374 Dual Sync Module

The Wheelock DSM-12/24-R Dual Sync Module (Alternate Number 126374) is an indoor, red electronic PCB synchronization device that coordinates precisely timed horn, strobe, and horn/strobe signaling across 12 VDC or 24 VDC notification circuits in commercial fire alarm installations. A dual NAC synchronization module designed for Wheelock Fire Alarm Notification Appliances, it supports Class A and Class B circuits, provides reliable cross-circuit synchronization, and mounts in a standard electrical backbox to streamline retrofit projects and new constructions. In practice, it enables synchronized audible and visual emergency signaling across commercial buildings, offices, schools, hospitals, warehouses, and industrial facilities, supporting NFPA evacuation signaling with features like temporal code horn operation and audible silence functionality. The device is specifically built to integrate with fire alarm control panels and notification circuits to deliver coordinated signaling across compatible Wheelock devices, ensuring a unified, contiguous emergency alert across connected appliances. Its compact, backbox-mount form factor and red enclosure help technicians deploy it in restricted utility spaces while maintaining indoor installation requirements for life-safety systems.