DF 650-ACP manual call points connect to addressable fire detection control and indicating equipment. Up to 254 devices can be connected to each alarm zone. Operation is achieved through the use of a pressure activated displacement element, which provides a safe and convenient way for building occupants to manually initiate a fire alarm condition. All models have an integral alarm indicator that illuminates when the manual call point has been activated. Resetting the manual call point is achieved by rotating a key through the front of the unit to place the operating face into the quiescent position. The DF 650-ACP manual call points provide monitoring of quiescent, alarm and fault conditions. DF 650-ACP range of manual call points provides fire detection and alarm system designers with a Standards compliant, premium product for life safety and property protection applications.