PXE-13S-R50 is a form factor expansion board made by IEI Technology for industrial motherboard mounting. It fits inside a standard 19-inch or 21-inch rack and accommodates 3 ISA- or PCI-based cards. The board is designed with adapter routing, signal integrity, and shock/vibration protection. It has an 8-bit parallel bus, 4 RS232/422/485 serial ports, and a 50-pin standard IDE/CF connector. Additionally, the board comes with an ATX power connector, two 5 V and two 12 V power connectors, I2C and SMBus headers, PCI-E x1 and x4 slots, an LVDS display connector, and a VGA connector.