Silent Knight, part of Honeywell's Fire Systems Group, has introduced its Model 5104, a six-zone fire control communicator that provides digital fire and reporting over ordinary telephone lines. The 5104 can be used as a stand-alone system, or incorporated into an existing system as a Slave DACT. As a standalone unit, it is used to monitor sprinkler systems for waterflow, supervisory and gate valve tamper conditions. The 5104 is UL 864 listed for NFPA 72 Central Station and Remote Supervising Station Fire Alarm System Service. It is FM approved, and has six fully supervised inputs: one Class A (Style D) input, and five Class B (Style A) inputs. Silent Knight. Circle 21.