I/O Ring is a proprietary OSAI bus using fibre optics to connect different devices for the management of Input and Output signals and machine peripherals. Digital I/O modules are available for both relay (OSARING, 44 inputs + 24 outputs), and transistor (High Density, 66 inputs + 36 outputs) devices. It is also possible to connect the Pilot Panel operator console through the I/O Ring.
