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PROFIBUS Power Hub Segment Coupler 3 (SK3)
Installation and Commissioning
3.2
Shielding/Grounding
Figure 3.1
The shield (screen) of the PROFIBUS cable on the gateway is directly connected to the
grounding terminal of the motherboard.
Tip
Earth Connection
Ensure that the grounding practice applied is well-planned and consistent. Ensure a clean
earth always.
We recommend connecting the grounding terminal to earth in order to achieve the highest
protection against electromagnetic interference (EMI).
It may be necessary to ground all exposed metal parts as a matter of course.
3.2.1
Connection to Equipotential Bonding System
Caution!
Risk of electric shock or property damage from inadequate grounding
If you fail to connect all metal parts of the device to protective local earth correctly, this could
result in potential equalization currents. These currents could hurt operating personnel or
cause property damage.
The grounding terminal is not a safety earth: Do not use the grounding terminal to ground
exposed metal parts.
Ground exposed metal parts of the device separately. Ensure that a correct grounding is
guaranteed at all times.
All shield connections are internally connected to the "Shield/Screen GND" grounding terminal.
Connecting the Ground Connection Cable
Note!
Use a cable with a minimum cross core section of 4 mm².
1. Connect the ground cable to a cable lug.
2. Position the cable lug over the ground connection clamp with the cable pointing downwards.
Stylized composition of the shield lines inside the gateways
21
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