Addressable systems work on a 2 wire loop system, each of the devices has an address. The control panel monitors these devices and analyses the data they send in to establish the status of the device. The panel then can report devices as being normal, fault, pre-alarm and fire.
To add more I/O capability to the extensive options already offered by the Syncro control panel, up to thirty two, sixteen channel I/O boards may be connected. The 16 channel boards may be mixed on the RS485 bus with 8 way sounder boards, 6 way sounder boards or 4 way conventional detection zone boards to provide a very flexible system of I/O to satisfy any requirement.