Network Topology; Minimum Node-To-Node Cable Length - Control Techniques Nidec SI-EtherCAT User Manual

Drive grounding brackets should be connected to each other by separate cables, and the cable
length should be as small as possible.
Please note EMC Ferrite inductors of the required specification are available from the following
supplier:
Manufacturer:
Manufacturer Part No:
Order code:
Description:
4.4

Network topology

Control Techniques recommend implementing daisy chaining on EtherCAT networks (see Figure 4-
2). Other Ethernet network topologies can be used but care must be taken to ensure that the
system still operates within the constraints specified by the designer.
Figure 4-2 SI-EtherCAT daisy chain network topology
Master / PLC
4.5

Minimum node-to-node cable length

There is no minimum length of cable recommended in the Ethernet standards. To avoid possible
problems it is recommended that you allow sufficient cable length to ensure good bend radii on
cables and avoid unnecessary strain on connectors.
16
WURTH ELEKTRONIK
74271222
1635620
Ferrite core, Split type
Unidrive
M600
Unidrive
M200
SI-EtherCAT
SI-EtherCAT
Unidrive
M700
Distributed I/O
SI-EtherCAT
SI-EtherCAT User Guide