User Manual

Additional Installation Tips

Note:

Thegroundingwiresshould beshortandtheconductorshouldhavealargearea.

Along,thingroundingwirehasaveryhigh impedance(resistance)athighfrequencies

anddoesnotguidedisturbances to the ground.

Multi-wireconductorsareb etter thans inglewireconductorswiththesamearea.

Abraided conductor wirewiththesame areaisevenbetter. Thebestisashort,thick

groundingbraid.

6.2 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 industrial units for Ethernet, the RJ45 contact’s shield is connected to the

chassis via a capacitor, see 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 shield directly grounded or

grounded via a capacitor.

Note:

Inmanycases,connectingtheshieldedEthernetcablingtothechassisatbothendsis

inappropriate. Humor groundingloopscanoccur. Unshielded cabling may even result

infewercommunicationerrors.

BeijerElectronics, MAEN180B