RPS4 is a redundant power supply when maximum reliability is desired, suitable for e.g. wireless receivers, IFB/IEM transmitters etc. intended for rack mounting. RPS4 contains two separate power supplies with separate temperature-controlled fans, connected in "failover mode" for automatic backup should one fail. There are 4 12VDC/1.5A outputs with separate fuses, the connections are made with DC connectors with thread locking.