Kunbus PROFINET IRT Slave, User Manual

Page: 13 / 40

Gateway PROFINET IRT Slave 13
4 Installation
4.1 Preparations for Inteference-free Operation
In the following section we have compiled some general information for you that is important for
interference-free operation. If you are already acquainted with this topic, you can skip to the next
section. There, you will learn about which conditions are necessary for installing the gateway
component.
Cable routing
Route your cables separately in cable groups. This will protect your gateway from any unintended
electromagnetic interferences.
The following groups should be routed separately from each other:
Group Line
A Data and power supply lines for:
DC voltage below 60 V
AC voltage below 25 V
B Data and power supply lines for:
DC voltage between 60 V and 400 V
AC voltage between 25 and 400 V
C Power supply lines above 400 V
– You can route cables of the same group together in cable ducts or bundles.
– Cables of group A and B:
– Route the groups in separate bundles or
– in cable ducts at a minimum distance of 10 cm from each other.
– Cables of group C
– Route the groups in separate bundles or
– in cable ducts at a minimum distance of 50 cm from the other groups.
Shielding
Shield your cables. This will reduce any unintended electromagnetic interferences.
Potential Equalization
Potential differences occur when devices are connected to different earths. These potential
differences cause malfunctions.
To prevent malfunctions, you have to route an equipotential equalization conductor.
When doing so, bear in mind the following points:
– Select an equipotential equalization conductor with low impedance.
– Select the following as a reference value for the cross-section of the potential equalization ca-
ble:
– 16 mm
2
for potential equalization cables of up to 200 m in length
– 25 mm
2
for potential equalization cables of more than 200 m in length
– Use potential equalization cables made of copper or galvanized steel.
– Connect potential equalization cables extensively with the earth rail.
Installation