DIAS-DRIVE 335-23
27.09.2017
Page 85
7.8
Recommended Shielding for VARAN
The real-time VARAN Ethernet bus system exhibits a very robust quality in harsh industrial
environments. Using IEEE 802.3 standard Ethernet physics, the potentials between an
Ethernet line and sending/receiving components are separated. In the event of an error, the
VARAN Manager resends messages to a bus participant immediately. 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 sources.
SIGMATEK recommends the use of
CAT5e
industrial Ethernet bus cables.
For the shielding, an
S-FTP cable
should be used.
It is a symmetric, multi-wire cable with unshielded pairs. For the total shielding, 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 to
protect against vibration!