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3. Installation
3.5 Preparing the device for operation
3.5.1.1 Functional earthing Widescreen terminal
60
The functional earth for Panel-PCs, Terminals, and Terminal with Extender RX is esta-
blished with a ground strap as follows:
CAUTION
SAFELY DIVERTING ELECTRICAL INTERFERENCE CURRENTS
XP-504The must be connected to a central earth point with a con-
ductor that is as short and has as low a resistance as possible.
Ground connection characteristics:
l
Wire cross-sectional area ≧ 6 mm²,
length ≦ 350 mm, width ≥ 20 mm
The XP-504 needs to be connected to the conductive structure in,
e.g., the control panel using the central earth point. This method of
earthing is mandatory required for proper function.
Grounding concept – instructions for low-impedance component grounding
Fig. 19: Functional earth with ground strap
Contact surfaces must be conductive and resistant to corrosion.
l
Use toothed lock washers to prevent corrosion on contact surfaces.
l
The conductive contact surface must be as large as possible.
l
Do not use ground straps with ring terminals
l
The grounding point must also have a low-impedance ground connection.
l
Assemble and terminate a suitable ground strap with a length ≤ 35 cm, width ≥ 2
cm, and an eyelet in advance.
Remove the M6 nut from the set screw at the grounding point.
Slip the ground strap eye onto the set screw.
Tighten the M6 nut with a torque of 1.3 Nm (11.5 lb-in) back on the set screw.
XP-504 04/2022 MN048028EN Eaton.com
Ø 6.5 mm
(Ø 0.26 ")
≧ 2 0 m m
(≧ 0 .7 8 " )
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