Simplex 742-351 SF 24/10 They are designed to function

They are designed to function as either a horn or siren by setting an internal

Complete systems may be shut down via the building’s fire alarm control panel (FACP) in the event of smoke detection

are design use with Series IL

Speaker/visible (S/V) notification appliances combine a multi-tapped speaker and a high intensity strobe to provide audio/tone notification and visible notification from the same appliance

Genesis LED EG4 Series uses high efficiency optics

Simplex 742-351 SF 24/10 They are designed to functionSimplex 742 351 is a Power Distribution Interface (PDI) board used in 4100U and 4100ES fire alarm panels. It distributes power and data between the main bay and expansion bays, ensuring internal system communication and module operation. DataSheet 4100U PDI PCA Replacement Instructions