Technical data

CONTROL PANEL ETV 1961

08.07.2014 Page 27

VARAN Recommended Shielding

The VARAN real-time Ethernet bus system offers robust performance in harsh industrial

environments. Through the use of IEEE 802.3 standard Ethernet physics, the potential

between an Ethernet line and sending/receiving components is kept separate. The

VARAN Manager resends messages to a bus participant immediately when an error oc-

curs. It is principally recommended that the shielding guidelines below be followed.

For applications in which the bus line is run outside the control cabinet, correct shielding is

required. This is especially important, if due to physical requirements, the bus lines must

be placed next to sources of strong electromagnetic noise. It is recommended that when-

ever possible, to avoid wiring VARAN-Bus lines parallel to power cables.

SIGMATEK recommends the use of CAT5e industrial Ethernet bus lines.

For the shielding variants, an S-FTP bus line is recommended, which is a symmetric,

multi-wire cable with unshielded pairs. For the total shielding, a combination of foil and

braiding is used; it is recommended that an unvarnished variant be used.

The VARAN cable must be secured at a distance of 20 cm from the connector for

protection against vibration!

Le câble VARAN doit être protégé contre les vibrations à moins de 20 cm du con-

necteur (par exemple à l’aide d’une pince)!