Beijer-electronics iX T12C EN Manuel d'utilisateur télécharger pdf (Page 26)

Additional Installation Tips

Note:

Thegroundingwiresshouldbeshortandt heconductorshouldhavealargearea.

Along,thingroundingwirehasaveryhighimpedance(resistance)athighfrequencies

andwillnotguidedisturbancestotheground.

Multi-wireconductorsarebetterthansinglewireconductorswiththesamearea.

Abraidedconductorwirewiththesameareaisevenbetter. Thebestisashort,thick

groundingbraid.

7.2 EthernetConnectioninthe

OperatorPanel

RJ45

Industrial Ethernet

Operator panel

Shielded

Short and

unshielded

0.1 μF

250 V

1-1

3-3

8-8

2-2

In some industri al units for Ethernet, the RJ45 contact’s shield is connected to the

chassis via a capacitor, s ee 1 in drawing above.

The operator panel’s Ethernet shield is directly connected to the chassis, see 2 in

drawing above.

Check whether the other Ethernet unit has its shi eld directly grounded or

grounded via a capacitor.

Note:

Inmanycases,connectingtheshieldedE thernetcablingtothechassisatbothendsis

inappropriate. Humorgroundingloopscanoccur. Unshieldedcablingm ay evenresult

infewercommunicationerrors.

BeijerElectronics, MAEN082D

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Beijer-electronics iX T12C EN Manuel d'utilisateur Page 26