Product Details
The Simplex 8742-346, also known as the 742-346, is a 4009A CPU Board designed for use in Simplex 4009-9201 Notification Appliance Circuit (NAC) Panels. This CPU board serves as the central processing unit for the NAC panel, managing the control and distribution of power to notification appliances such as horns, strobes, and speakers within a fire alarm system.