It is now possible to run two Saffire interfaces (exc. Legacy Saffire interfaces) connected to a single computer. This enables two devices to be connected to the same system and used as one device expanding the available Inputs and Outputs to your DAW. Dual Device Support is limited to two devices connected to the same bus at sample rates of 48kHz or below.
For more information for setting up two Saffire interfaces, please download the comprehensive User Guide here.