The 8-wide Legacy Vertical I/O interface carriers provide power and communications connections for the I/O subsystem. There are two types of 8-wide Legacy Vertical I/O interface carriers:
- Left 8-wide I/O interface carrier (card positions 1-8 from top to bottom)
- Right 8-wide I/O interface carrier (card positions 8-1 from top to bottom)
The following figure shows the left and right 8-wide Legacy Vertical I/O interface carriers.
The 8-wide Legacy Vertical I/O carriers are designed with a split high-side power plane and a shared common return plane. A jumper bridges both high-side planes for a continuous conductive path. If additional power is required, you can break this high-side path and add another power source to the unpowered end.
To decide when to use external power, calculate the power used per position on the carrier. Add these values to determine if they exceed the power supply’s capabilities. If the calculation of a given position exceeds the power supply’s capabilities:
- Locate the power jumper that is just before this position (count from the power supply end).
- Insert additional power at this node.
If multiple power supplies are used, be sure they are grounded at the same point.