Photoelectronic Low-Profile Plug-In Smoke Detector for Special Applications, 2D51

2D51 duct smoke detectors are low-profile photoelectric detectors designed for special applications, specifically for use in no-flow or low-flow air-handling systems (0 to 4,000 fpm). Pendant or plenum mounted 2D51 detectors are intended to be installed into B210LP bases and wired to a D4P120 power board only control units. D4P120 power boards are capable of controlling up to two 2D51 sensors. Pendant mounted in a standard electrical boxes within ducts, the twist-in/twist-out heads allows easy removal from bases for quick cleaning and maintenance. 2D51 heads can be locally tested using a magnet or by using the test/reset pushbutton on the D4P120 power board. Features & Benefits: * Low standby current * Two LEDs blink in standby * Field sensitivity metering of detector to meet the requirements of NFPA 72 with the use of RTS2/RTS2-AOS and SENS-RDR * Designed for mounting on a standard electrical box * SEMS screws for easy wiring and positive wire retention * Removable cover and insect screen for field cleaning * Remote push button test/reset, LEDs provide visual indications * Onboard supervisory and alarm relays * Accepts 24 or 120V supply voltage * Interconnect up to 100 units for common functions