Simplex 565-654 Duct Detector Card (With Relay)

The Simplex 565-654 duct detector card is an internal replacement electronics board for the Simplex 4098-9751 TrueAlarm in-duct sensor housing with relay. It serves as the housing’s interface board, linking the sensor head/base assembly to system wiring and supporting the relay-housing functions when the enclosure and field wiring are being reused. Key Specifications: Type: Internal duct detector interface card (replacement electronics) Core Function(s): Replacement internal board for the 4098-9751 relay in-duct housing; interfaces the sensor assembly to the fire alarm system and housing functions Loop/Protocol: Used within TrueAlarm in-duct housings that communicate on IDNet or MAPNET II Power: Operates as part of the assembled housing (system wiring and auxiliary power are provided at the housing level) Indicators/UI: Works with the housing’s status indication (LED is provided by the assembled in-duct housing) Compatible Accessories: 733-868 – Internal ribbon cable used inside the housing to connect the duct detector card to the head base/sensor connection