The RTR Closed Loop controller shares the same housing with the RTR Servo controller. The new housing is larger than the RTR performance and classic. Extra space was required since both systems have encoder feedback and thus need more space for wiring and feedthrough of encoder cable. The new housing also have extra outputs. Standard it has 2 outputs which switch 220V solid state relays. From the software, Tool,Flood,Aux and Mist are connected. As an optional item an I/O card can replace on of the Tool/Flood modules. Also its possible to integrate an SSD PC in this housing. The RTR closed loop system is intended for the very demanding hobiest or the busines user. The best quality components are used, and since its a closed loop system, no more step los can occur. Also in terms of safety several items are added. The drives can indicate that they are in failure mode, and this signal is fed back to the software, thus warning the client that the drive is in failure mode. When one drive goes into failure mode, automaticly, also the other drives are disabled, to prevent any damage to the system.