The iFlex IRX is an expander that provides for connection of multiple RMI-IR3 infra red door sensors to an iFlex mixer. Up to four (4) RMI-IR3 door sensors can be connected to a single IRX. The IRX is then connected via one Cat5e (or better) cable to a single Logic I/O port on an iFlex mixer. By using one iFlex IRX many systems that may have required an RMPC-12-45 in order to connect the necessary remote sensors to an iFlex 1280 may now be able to use the iFlex IRX instead of the RMPC-12-45. The iFlex IRX comes with four compression mounting stand offs for direct mounting to the rack back wall. The IRX is for use only with RMI-IR3 door sensors.