Maple Systems HMI5000 Series Installation Manual page 5

5 HMI5000 Series Installation Guide
Control Panel Design Guidelines
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.
Figure 1: Typical Panel Layout
Control Panel Grounding
The control panel must 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 HMI may occur:
Connect the HMIs chassis ground terminal to a reliable earth ground
with a low-resistance path.
Route all earth ground wires that lead from the HMI, 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 HMI 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 HMI‟s chassis ground terminal.
1010-1005 Rev 04 www.maplesystems.com