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Xedge Chassis Systems
Xedge 6002 Ground Connections
A ground screw and a ground switch located on the rear of the Xedge 6002 chassis provide for the
connection or separation of chassis and signal grounds as required. It is common practice to connect
chassis and signal ground together (this is the default selection).
Signal ground is the 0 V reference for the digital circuits contained in the chassis and the reference
for unbalanced data interfaces such as EIA/TIA-232-E and RS-423. Connecting grounds helps
prevent AC power line noise, but a large ground current can flow in the shield and the exchanged
signals grounds of a cable (i.e., signal grounds that are in the cable) if it is connected between
equipment grounds that have different potentials. To avoid this problem:
•
Check that the potential difference between grounds is less than 0.25 V RMS.
•
Break the continuity of the shield in the middle of a long cable run.
•
Connect the shield to ground at only one end.
•
Separate the signal and chassis grounds. In this case, the signal ground should be connected to
a customer-provided building ground (100 ohm recommended).
Note
Local electrical codes and equipment manufacturers may require separation of signal and chassis grounds.
Perform one of the
Grounding Options
To connect chassis and signal grounds:
1. Connect a spade lug to the ground screw and a ground connection at the site.
2. Slide the ground switch fully to the DOWN position.
To separate chassis and signal grounds:
1. Connect a spade lug to the ground screw and a ground connection at the site.
2. Slide the ground switch fully to the UP position.
2-6
Grounding Options
procedures below to suit your site requirements.
Xedge 6000 Hardware
Installation & Setup Guide
Xedge 6002 Chassis
032R440-000
Issue 17
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