A fire suppression system comprising: a centralized controller; and a plurality of modules (14x, 14y, 14z), each module including: a housing; a printed circuit board with a microprocessor mounted to the printed circuit board; a first connector including a first pair of data wires mounted to the board; and a second connector including a second pair of data wires mounted to the board, the printed circuit board electrically connecting the first and second pairs of data wires (38,42); the plurality of modules (14x, 14y, 14z) being interconnected with the central controller to define at least one data bus (16, 18, 20)for centralized fire detection and system response, the at least one data bus (16, 18, 20) having a first end module with its first connector connected to the centralized controller and a second end module with its second connector for connection to another module, the printed circuit board of each module interconnecting the plurality of modules in series to the central controller, wherein the system further comprises a power module interconnected with the central controller to power the at least one data bus (16, 18, 20), wherein in each of the plurality of modules (14x, 14y, 14z) of the at least one data bus (16, 18, 20), the first connector includes a first pair of power wires mounted to the board, and the second connector includes a second pair of power wires mounted to the board, the printed circuit board electrically connecting the first and second pairs of power wires (104, 106), and the at least one data bus (16, 18, 20) including a power bus with the printed circuit board of each module (14x, 14y, 14z), interconnecting the modules in series to the power module. a centralized controller; and a plurality of modules (14x, 14y, 14z), each module including: a housing; a printed circuit board with a microprocessor mounted to the printed circuit board; a first connector including a first pair of data wires mounted to the board; and a second connector including a second pair of data wires mounted to the board, the printed circuit board electrically connecting the first and second pairs of data wires (38,42); a housing; a printed circuit board with a microprocessor mounted to the printed circuit board; a first connector including a first pair of data wires mounted to the board; and a second connector including a second pair of data wires mounted to the board, the printed circuit board electrically connecting the first and second pairs of data wires (38,42); the plurality of modules (14x, 14y, 14z) being interconnected with the central controller to define at least one data bus (16, 18, 20)for centralized fire detection and system response, the at least one data bus (16, 18, 20) having a first end module with its first connector connected to the centralized controller and a second end module with its second connector for connection to another module, the printed circuit board of each module interconnecting the plurality of modules in series to the central controller, wherein the system further comprises a power module interconnected with the central controller to power the at least one data bus (16, 18, 20), wherein in each of the plurality of modules (14x, 14y, 14z) of the at least one data bus (16, 18, 20), the first connector includes a first pair of power wires mounted to the board, and the second connector includes a second pair of power wires mounted to the board, the printed circuit board electrically connecting the first and second pairs of power wires (104, 106), and the at least one data bus (16, 18, 20) including a power bus with the printed circuit board of each module (14x, 14y, 14z), interconnecting the modules in series to the power module.