The Cooper (Eaton) FXN520 is a low-profile, high-impact mounting base that serves as the standard interface for conventional smoke and heat detectors. It features a simplified “first-fix” design with a dedicated terminal block for loop wiring, allowing installers to complete the cabling before the detector head is attached. The base includes a specialized terminal for the connection of a remote indicator LED and a link for zone continuity, ensuring the fire system remains monitored even when a detector head is removed. Built from fire-retardant PC/ABS, its robust construction and secure “click-lock” mechanism make it an essential component for reliable conventional fire detection installations in commercial and industrial settings. Technical Specifications ? Brand: Cooper (Eaton) ? Model/Part No: FXN520 (also known as CDBB300) ? Operating Voltage: 15 V DC to 30 V DC ? Connection Type: 2-Wire Conventional ? Terminals: 6-Way (Line In/Out, Remote Indicator, Screen) ? Material: Flame Retardant PC/ABS ? IP Rating: IP40 (when detector is fitted) ? Operating Temperature: -10?C to 55?C ? Dimensions: 104 mm x 104 mm x 22 mm (4.09 inch x 4.09 inch x 0.87 inch) ? Weight: 0.06 kg Key Features ? Universal Compatibility: Designed to accept the full range of Cooper conventional detectors, including optical, photo-thermal, and fixed heat models. ? Integrated Remote Indicator Terminal: Features a dedicated output terminal for connecting a remote LED indicator to show alarm status from hidden or high-ceiling areas. ? Secure Locking Mechanism: Equipped with a discreet tamper-resistant lock to prevent unauthorized removal of the detector head without the use of a specialized tool. ? Simplified Wiring Design: Includes large, robust terminals with a clear layout to ensure fast and reliable cable termination during installation. ? Earth Strap Continuity: Built with a dedicated terminal to maintain the continuity of the cable screen (shield), protecting the system from electromagnetic interference.
