Sun Microsystems Sun Fire V490 - Manual (Page 239)

Appendix A Connector Pinouts 211
USB Connector
Two Universal Serial Bus (USB) connectors are located on the centerplane and can be
accessed from the back panel.
USB Connector Diagram
USB Connector Signals
Pin Signal Description Pin Signal Description
A1 +5 VDC B1 +5 VDC
A2 Port Data0 - B2 Port Data1 -
A3 Port Data0 + B3 Port Data1 +
A4 Ground B4 Ground
A1 A2 A3 A4
B1 B2 B3 B4