The ABB GM/A8.1 security panel is suitable for integration in security systems to link up to 344 detector groups with motion detectors to the security bus S-Bus 1 zone modules. The maximum number of detector groups connected to the security bus S-Bus 1 is decided by the associated system components' current requirements, cable length, and cross-section. The ABB GM/A8.1 security panel can connect up to 5 BT/A series keypads on the S-Bus 3 security bus, offering the capability of operating with up to 128 additional detector groups via KNX.