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Carlo Gavazzi’s Dupline® 3-wire bus makes elevator control systems simpler and more effective than traditional systems. Space and cost saving I/O-boards with 2 inputs and outputs are mounted in each floor fixture and connected to the push button and lamps. In the elevator car, where the number of signals is higher, boards with multiple I/O’s are used. All the I/O-boards are connected to the same wire cable, which provides both 24VDC power for lamps and floor indicators and serial communication connection with the Dupline® Master Module.
