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In stal la tion Instructions
In addition, please observe all of the following safety precautions:
• Read these instructions carefully.
• Keep this installation reference guide 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.
Con trol Panel De sign Guide lines
Pay careful attention to the placement of system components and associated cable routing. These items can
significantly enhance the performance and integrity of your control application.
Shielded power cable
Ground
strap
Panel PC is
grounded to
control panel
Shielded
communication
cable
Con trol Panel Ground ing
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 Panel PC 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 computer, 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's 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.
Ivory Series
Panel PC
Power
(rear side)
Supply
COM1 [RS-485 2/4W]
COM1 [RS-232]
COM3 [RS-485]
COM3 [RS-232]
PLC [RS-232]
GND
24V
COM2 [RS-232]
Quiet ground
Control panel is
tied to a reliable
earth ground
PLC/Host
Line
I / O control lines
Filter
Ground wires
Quiet ground
(isolated)
Con trol Panel Example
7
Power
line
filter
1010-1010, Rev 02
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