System description TwinSAFE
EJ19xx and EJ29xx
10
Version: 1.2.0
3.3
EtherCAT plug-in module system (EJ)
Similar to the EtherCAT terminal system, a module strand consists of a Bus Coupler and any desired I/O
modules. In contrast to the EtherCAT Terminals, however, the EtherCAT plug-in modules have no spring-
loaded contacts, since the wiring level is outsourced: communication, signal distribution and the supply of
power to the modules takes place via plug connectors on the back side of the modules and the conductive
tracks of the signal distribution board.
The EtherCAT plug-in modules and the plug level for sensors and actuators can be placed flexibly on the
signal distribution board. Signal distribution boards can be user-developed or provided as custom solutions
by Beckhoff Automation GmbH & Co. KG.
Fig. 1: EtherCAT plug-in module system (EJ)
