621 addressable alarm zone input modules provide the interface to connect non-addressable input devices (such as detectors or manual call points) to Numens addressable control and indicating equipment.

The 621 alarm zone input module is compatible with all Numens non-addressable fire detection and alarm system detectors, and other input devices. Up to 125 addressable alarm zone modules can be connected to each alarm zone loop.

The 621 alarm zone input module range provides fire detection and alarm system designers with a Standards-compliant,

economical product for life safety and property protection applications