NORD Drivesystems BU0570 User Manual

Page 13

3 Commissioning

BU 0570 GB-0312

Subject to technical amendments

3 Commissioning

3.1 Cabling

3.1.1

Topology

The TU3-ECT EtherCAT modules can only be interconnected in a linear structure.

Fig. 5 EtherCAT topology

The EtherCAT cable from the master must be connected to the RJ45 "IN" socket of the TU3-ECT. The
EtherCAT connection from the TU3-ECT must be made via the "OUT" socket. With the last device, the
"OUT" socket remains free, a cable termination is not necessary.
The integration of a normal Ethernet switch for the connection of normal EtherCAT devices must be made
between the EtherCAT master and the first EtherCAT module; see the following diagram.

Fig. 6 EtherCAT topology with integrated standard switch

3.1.2

EMC

If EMC measures are not in place, high-frequency interference which is mainly caused by switching
processes or lightning often causes electronic components in the bus participants to be faulty and error-free
operation can no longer be ensured.
Correct laying of the bus cable dampens the electrical influences which may occur in an industrial
environment. The following points must be observed:

 Implement long connections between bus participants by the shortest possible distances.
 Only use plugs with a metal housing.
 For the production of bus cables lay the shielding on as wide an area of the plug as possible.
 With the parallel installation of bus cables, a minimum distance of 20 cm should be maintained from

other cables carrying a voltage greater than 60V. In particular, this must be observed for cables to
motors or chopper resistors. This applies to lines laid both inside and outside of control cabinets.

 The minimum distances for parallel installation may be reduced by shielding cables carrying voltage or

by means of earthed metal dividers in the cable ducts.

 Connect SK TU3- Ethernet module to the PE (Connection via the plug pin next to the 24V supply).

EtherCAT
Master

TU3-ECT

EtherCAT
Master

Switch

TU3-ECT

Printer