ICP DAS USA ALX-9000 Series User Manual page 25

Step 3: Connect the ground lead to the frame ground point
Tips & Warnings
A good common ground reference (earth ground) is essential for proper
operation of the ALX-9000. One side of all control circuits, power circuits and the
ground lead must be properly connected to earth ground by either installing a
ground rod in close proximity to the enclosure or by connecting to the incoming
power system ground. There must be a single-point ground (i.e. copper bus bar)
for all devices in the enclosure that require an earth ground.
ALX-9000 (Linux based PAC) User Manual version 1.0.0 Page: 25
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