User Manual M3000® Automation System / MSC II (Moog Servo ...

7 Networking M3000 ® Modules EtherCAT
7.2 EtherCAT
WARNING Do not connect EtherCAT to any other Ethernet networks.
The high rate of telegrams which are transmitted by Ether-
CAT will prevent other devices like computers and servers on
the network from transmitting data.
There is a danger of
• Network overload/breakdown
• Malfunction of connected devices
• Data loss at connected devices
It is strongly recommended to use cables of a special color
only for EtherCAT connections.
Technical data:
• 100 Mbit/s transfer rate
• Maximal cable length between two devices: 100 m
• Termination: device internally
7.2.1 Bus Topology
The network physical topology is line.
The connection between two devices is a point to point connection. Thus
each slave device has an input and an output connector which relays the data
to the next slave device in the line.
EtherCAT
Master
EtherCAT
EtherCAT
EtherCAT
Slave 1
Slave 2
Slave 3
in out in out in out
Figure 37: EtherCAT Bus Topology
7.2.2 EtherCAT Interface Cables
RJ45 Mating
Connector
8
1
1
2
3
6
TD+
TD-
RD+
RD-
Figure 38: 100BaseT Cable with Non-Crossed Twisted Pair Wires (Patch Cable)
with 8 Pole RJ45 Mating Connectors, Cable Category 5, Wire Cross Section > 0.22 mm² (24 AWG)
For the terminal assignment of the EtherCAT front panel connector of the
MSC II control module, see: � EtherCAT connector on page 81
EtherCAT
Bus Topology
EtherCAT Bus Topology
100BaseT Cable
with Non-Crossed
Twisted Pair Wires
(Patch Cable)
© Moog GmbH User Manual M3000 ® and MSC II (CA65865-001; Version 1.1, 08/08) 49
RD+
RD-
TD+
TD-
1
2
3
6
RJ45 Mating
Connector
1
8