Simplex 4098-9751 In-Duct Sensor Housing with Relay

The Simplex 4098-9751 in-duct sensor housing with relay installs a 4098-9714 TrueAlarm analog photoelectric sensor directly in HVAC duct airflow for applications where sampling-tube duct detectors are not appropriate. It supports 0 to 4000 ft/min duct velocity, communicates on TrueAlarm IDNet or MAPNET II, and adds a programmable local Form C relay for fan shutdown, damper control, or other fire-response actions. Key Specifications: Type: TrueAlarm in-duct sensor housing with programmable local relay (4-wire) Core Function(s): Houses a spot-type TrueAlarm photoelectric smoke sensor for duct smoke notification; provides a panel-programmable local relay output Loop/Protocol: TrueAlarm analog communications; IDNet or MAPNET II (auto-selected), 1 address per housing Power: Two-wire IDNet/MAPNET II communications plus 18 to 32 VDC for relay power (24 VDC supplied by fire alarm system); 240 μA standby @ 24 VDC, 30 mA alarm @ 24 VDC Indicators/UI: Red LED visible through the transparent cover (pulsing = power-on; steady = alarm/trouble per panel); operating range 15°F to 122°F, 10% to 90% RH Compatible Accessories: 4098-9714 – TrueAlarm analog photoelectric sensor head (required, ordered separately) 565-654 – Duct detector card (internal replacement electronics for the housing) 733-868 – Internal ribbon cable used inside the housing to connect the duct detector card to the head base (service/repair part) 2098-9806 – Remote test station (key switch plus remote red LED) 2098-9808 – Remote LED alarm indicator 4098-9819 – Adapter for 6 in round duct 4098-9824 – Adapter for 8 in round duct 4098-9852 – Adapter for 10 in round duct 4098-9853 – Adapter for 12 in round duct System Compatibility: Compatible with Simplex control panels that support TrueAlarm IDNet or MAPNET II communications; relay operation is not compatible with 2120 CDT.