PXI Express chassis backplane provides the PCIe-based high-speed data bus, PXI trigger lines, 10 MHz reference clock, and star trigger fabric interconnecting all PXI Express modules in the chassis.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | PCIe x8 | High-speed data per slot | BUS |
| 2 | PXI_CLK10 | 10 MHz reference clock | BUS |
| 3 | PXI_STAR | Star trigger fabric | I/O |
| 4 | PXI_TRIG0-7 | Trigger bus lines | I/O |
| 5 | GND | Ground | GND |
| 6 | PWR | Slot power rails | PWR |