EP9128 | EtherCAT junction, IP 67
Port 1:
signal input
Port 2…8:
signal output
Power supply
status display:
Box supply (US)
Auxiliary voltage (UP)
1 | Tx+
2 | Rx+
3 | Rx-
4 | Tx-
1 | + 24 V DC Us
2 | + 24 V DC UP
3 | GNDs
4 | GNDP
Power supply feed
Power supply down-
stream connection
extended temperature range

EP9128-0021 | EtherCAT junction, IP 67

Line, tree or star: EtherCAT supports virtually any topologies, which can also be directly branched in the field using the EtherCAT Box modules. If several junctions are required at one point in the star topology, an EtherCAT junction can be used to branch the topology further.

Analogous to the infrastructure components with IP 20 protection, the EP9128-0021 eight-way EtherCAT junction offers the possibility to construct the branches of the topology with the smallest possible number of components in the IP 67 world as well. The EtherCAT network is connected to the input port of the EP9128-0021 and can be extended at ports 2 to 8. EtherCAT topologies can be arranged even more flexibly with the multiple junctions with IP 67 protection, since connection to the IP 20 world is also possible via the ports. The EtherCAT junctions are connected via shielded M8 sockets with direct display of link and activity status. Suitable accessories (cables and connectors) are available.

In conjunction with TwinCAT or other suitable EtherCAT masters the EP9128-0021 also supports coupling and uncoupling of EtherCAT strands during operation (Hot Connect). The device cannot be used as a standard Ethernet switch.

Technical data EP9128-0021
Task within EtherCAT system coupling of EtherCAT junctions
Connection method M8, screw type, 4-pin
Data transfer medium Ethernet/EtherCAT cable (min. Cat. 5), shielded
Bus interface 8 x M8, shielded, screw type
Distance between stations max. 100 m (100BASE-TX)
Protocol EtherCAT
Delay approx. 1 µs per port
Data transfer rates 100 Mbit/s
Configuration not required
Power supply 24 V DC (-15 %/+20 %)
Current consumption 24 V DC approx. 150 mA
Dimensions (W x H x D) 60 mm x 126 mm x 26.5 mm
Operating/storage temperature -25…+60 °C/-40…+85 °C
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 65/66/67 (conforms to EN 60529)/variable
Approvals/markings CE, UL
ZK1090-3xxx-xxxx Cables for EtherCAT signal in- and -output