The input / output modules are devices intended to interface ON/OFF devices such as push-buttons, switches, commutators, relays, to the LON network. They are all packaged in standard rail DIN mount boxes of variable length depending on their function and number of inputs and outputs. Screw type terminals are provided for easy wiring of the network, 24V power supply and input and output devices. The LON network transceiver is a FTT-10 at 78 kbps.