The Numens 682-002 is a low-profile, 4-terminal isolator base, measuring 99mm in diameter. It features continuity functionality and is designed in a red color for clear visibility. This base provides electrical isolation for addressable fire detection systems, ensuring that short-circuit faults in wiring affect only a minimum number of devices. It is compatible with 2-wire fire alarm systems and includes an automatic reset and LED indicator for operation. Additionally, the base is built for easy mounting and includes terminals suitable for wiring with diameters between 0.4 and 2.5mm²