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Electrical connection
6.3 Potential concept
I/O connection
● Create a low-impedance ground connection for additional cabinets, system components,
● Ground unused lines at one end in the cabinet.
● Choose the greatest possible clearance between the power and signal cables (at least 20
● Avoid unnecessarily long cable loops.
● Surge suppressors – e.g. RC elements or varistors – must be connected to the solenoids of
● In order to reduce noise/interference entering or exiting via the cable, filter auxiliary voltages
6.3
Potential concept
A noise-free connection between the internal and external supply voltage can be achieved by
connecting the 0 V potentials to each other and grounding them. This also eliminates the need
for the control circuit insulation monitor required by DIN EN 60204-1.
Figure 6-3
104
and distributed devices with the largest possible cross-section (at least 16 mm²).
cm). The greater the distance over which the cables are routed in parallel, the greater the
clearance must be. You must install additional shields if sufficient clearance cannot be
maintained.
contactors and relays in the device.
in the control cabinet.
Potential concept
SINAMICS SM150 6SL3815-7NP41-0AA1
Operating Instructions Rev.201910281301 EXAMPLE
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