NEC Aspire S Manual page 29

The ground lug descriptions are as follows:
● PBXG (CO/PBX Ground)
The grounding wire from the COIU or DIOPU PCBs are connected to the PBXG terminal plate. A
grounding wire should then be connected from the PBXG terminal plate to a known earth ground when
these PCBs are installed in the system.
● ETH (Earth Ground)
This ground lug is used for lightning protection. It should always be connected to the earth.
● FG (Frame Ground)
This ground lug is connected from the power supply cable to the metal frame of the main equipment.
Aspire S Hardware Manual
This grounding wire should be separate from the ETH grounding wire.
This grounding wire should be separate from the PBXG grounding wire.
Section 1: Installing the Cabinet
Section 1: Installing the Cabinet ◆ 1-19
1