System Grounding Recommendations

NI recommends making the following connections to ground your system.

+24 VDC Power Supply Connections (Main Controller Power)

  • Connect +24 V power to +24 VDC IN on the Semikron SKiiP3 26-pin connector
  • Connect +24 V power to input power supply of the NI sbRIO-9605/9606/9607
  • Connect +24 V GND/COM to GND input on the Semikron SKiiP3 26-pin connector
  • Connect +24 V GND/COM to GND (Digital GND) input power supply of the NI sbRIO-9605/9606/9607
  • Connect +24 V Earth (chassis) ground to system Earth (chassis) ground

+15 VDC Power Supply Connections (Gate Driver Control Signal Power)

  • Connect +15 V power to Vext input on the sbRIO-9683
  • Connect +15 V GND/COM to GND input on the Semikron SKiiP3 26-pin connector
  • Connect +15 V Earth (chassis) ground to system Earth (chassis) ground

±15 VDC Sensor Power Supply Connections (Sensor/Transducer Power)

  • Connect ±15 V power to system sensors/transducers
  • Connect ±15 V GND/COM to CS_COM input on the sbRIO-9683
Note Do not connect ±15 V sensor GND/COM to any other system ground other than CS_COM.
Note Do not use the ±15 V sensor power supply as the gate driver control signal power supply.

Additional Grounding Connectivity

  • Connect Semikron SKiiP3 heat sink to Earth (chassis) ground
  • Connect NI sbRIO-9605/9606/9607 chassis ground metal terminal to Earth (chassis) ground
  • Connect the shield of the cable interfacing the Semikron SKiiP3 to Earth (chassis) ground on your custom interface board