The 6U VPX version is the latest in Bustronic’s family of load boards. This includes a 3U VPX form factor style announced in 2009, VME64x/VME, CompactPCI, and AMC (MicroTCA) formats. The load board helps test a system's cooling capabilities by first applying the load to the power supply for verification and creating the necessary heat to confirm chassis cooling. By locating hot spots in the chassis, a system designer can verify where to optimally redirect the airflow to prevent overheating.
The 6U VPX load card features a microcontroller-based stepped load control to 100 W maximum. Go/No-Go indicators are present for 3.3 V, 5 V, 12 V, 12 V_Aux, -12 V_Aux, and 3.3 V_Aux. The rotary switch selects the voltage setting while pushing the ON switch will cycle between different power levels shown on the LED display. The set load power levels are saved in EEPROM. Other features include a power reset button (to minimum level) and a SYSRESET signal on the two test point outputs.