Yamaha RPio222 Digital I/O Stagebox for Rivage Mixing SystemsThe RPio222 I O rack features two RY card slots that provide flexible analog and digital I O configuration and expansion capability for RIVAGE PM series systems employing low latency TWINLANe networking. Dual power supply units are built in. Features: Two RY card slots that enable you to expand analog inputs and outputs, and or digital inputs and outputs. Two HY card slots that are capable of transmitting receiving up to 256 ins outs of digital audio