ETV 0853-3
CONTROL PANEL
Page 32
12.04.2017
Recommended Shielding for VARAN
The real-time VARAN Ethernet bus system exhibits very robust characteristics in industrial
environments. Through the use of IEEE 802.3 standard Ethernet physics, the potentials
between an Ethernet line and sending/receiving components are separated. Messages to a
bus participant are immediately repeated by the VARAN Manager in the event of an error.
The shielding described below is principally recommended.
For applications in which the bus is run outside the control cabinet, the correct shielding is
required. Especially when for structural reasons, the bus line must be placed next to strong
electromagnetic interference. It is recommended to avoid placing Varan bus lines parallel
to power cables whenever possible.
SIGMATEK recommends the use of
CAT5e
industrial Ethernet bus cables.
For the shielding, an
S-FTP cable
should be used.
An S-FTP bus is a symmetric, multi-wire cable with unshielded pairs. For the total shield-
ing, a combination of foil and braiding is used. A non-laminated variant is recommended.
The VARAN cable must be secured at a distance of 20 cm from the connector for
protection against vibration!
