Control Panel Grounding - Maple Systems PC100 Series Operation Manual

6
Warning:
to avoid damage by transient over-voltage.
Warning:
Warning:
only by a qualified service technician.
Warning:
service personnel

The power cord or plug is damaged

Liquid has penetrated into the equipment.

The equipment has been exposed to moisture.

The equipment does not work well, or you cannot get it to work according to the installation
reference guide.

The equipment has been dropped and damaged.

The equipment has obvious signs of breakage.
DO NOT LEAVE THIS EQUIPMENT IN AN UNCONTROLLED ENVIRONMENT WHERE
THE STORAGE TEMPERATURE IS BELOW - 20°C (-4° F) OR ABOVE 60°C (140° F). IT
MAY DAMAGE THE EQUIPMENT.
In addition, please observe all of the following safety precautions:
Read these instructions carefully.

Keep this manual for later reference.

For pluggable equipment, the power outlet must be installed near the equipment and must be
easily accessible.

Put this equipment on a reliable surface during installation. Dropping it or letting it fall could
cause damage.

All cautions and warnings on the equipment should be noted

Control Panel Grounding

The control panel should be connected to a good, high-integrity earth ground both for safety considerations and
shielding purposes. Maple Systems cannot overemphasize the importance of good grounding. If you fail to use
good grounding procedures during installation, sporadic malfunction of the computer may occur:

Connect the Panel PC's chassis ground terminal to a reliable earth ground with a low-resistance path.

Route all earth ground wires that lead from the Panel PC, the PLC, the power supply, and the line filter to a
central earth ground point such as a barrier strip. This will ensure that no ground current from one device
influences the operation of the other devices.

Connect the Panel PC chassis ground terminal to the control panel door using a heavy-gauge short braided
cable or ground wire to minimize resistance.

Connect the power cable's shield wire to the Panel PC's chassis ground terminal.

Connect the control panel to earth ground using a copper grounding rod close to the Panel PC and control
panel.
Hinged doors on control panels do not provide a long-term electrical connection to the rest of the enclosure.
Corrosion develops over time and prevents good electrical contract. For this reason, a separate wire braid should be
installed from the hinged control panel to the rest of the enclosure.
For a more in-depth overview of ground wiring techniques, refer to technical note #1027, "OIT Ground Wiring and
Electrical Noise Reduction," which you can find
1010-1022 Rev. 01
If the equipment is not used for a long time, disconnect it from the power source
Never pour any liquid into an opening. This could cause fire or electrical shock.
Never open the equipment. For safety reasons, the equipment should be opened
If any of the following situations arise, get the equipment checked by qualified
in the Support Center under Technical Notes on our website.
PC100 Series Operation Manual