PXI Express (PCIe-based) uses a hybrid backplane combining PXI trigger bus with PCIe x4 or x8 high-speed data bus for modular test instruments achieving up to 6 GB/s throughput per slot.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | PCIe Lanes | High-speed data bus PCIe x4/x8 | BUS |
| 2 | PXITRG0-7 | PXI trigger bus lines | I/O |
| 3 | PXISTAR | PXI star trigger for synchronization | I/O |
| 4 | PXICLK | 10 MHz reference clock | BUS |
| 5 | GND | Ground | GND |