Proface PS4800 - 19 Panel PC" - Manual (Page 146)

Hardware Modifications
146
PCI/PCIe Card Dimensions
Depending on the bus type, you can use standard PCI 2.2 half-size cards or PCI
Express (PCIe) half-size cards.
NOTE: PCI/PCIe cards cannot exceed the following dimensions.
The figure shows the dimensions of the standard half-size PCI card:
The figure shows the dimensions of the standard half-size PCIe card: