K555 Kentec Syncro Fault Tolerant Network Interface PCBManufactured by Kentec, this Kentec Syncro Fault Tolerant Network Interface PCB K555 connects up to 64 loop fire control panels with high integrity configurable networking. The flexibility of the Syncro system can be further enhanced by connecting control panels and repeaters together using a high integrity network. A simple 2 wire connection between each panel allows events to be transmitted to other parts of the system to provide indication or