The PXI Relay Driver Module controls up to 64 external relays with up to 50 VDC or 600 mA per channel drive capacity when using an external power supply. Modules can drive small DC motors or other inductive relay coils, and they include overcurrent, overvoltage, and flyback protection to ensure long operation. The PXI Relay Driver Module allows you to build custom switch configurations while using the standard IVI‐compliant NI‐SWITCH driver software.