ADLINK PCIe-7350 - Manual (Page 22)

12 Hardware Information
2.2 Connector Pin Assignment
The PCIe-7350 card is equipped with one 68-pin SCSI-VHDCI
connector and two SMB connectors. The SCSI-VHDCI connector
is for high-speed digital I/O and programmable function I/O, while
the SMB connectors are for sample clock input or exporting.