Commissioning
CX51x0
36
Version: 1.9
6.1.5
Installing passive EtherCAT Terminals
Note
Incorrectly installed passive EtherCAT Terminals
The E-bus signal between an Embedded PC and the EtherCAT Terminals can be impaired
due to incorrectly installed passive EtherCAT Terminals.
Passive EtherCAT Terminals should not be installed directly on the power supply unit.
EtherCAT Terminals that do not take part in active data exchange are referred to as passive terminals.
Passive EtherCAT Terminals have no process image and do not require current from the terminal bus (E-
bus).
Passive EtherCAT Terminals (e.g. EL9195) can be detected in TwinCAT. In the tree structure the EtherCAT
Terminal is displayed without process image, and the value in column “E-bus (mA)” does not change,
compared to the preceding EtherCAT Terminal.
Fig. 24: Identifying a passive EtherCAT Terminal in TwinCAT.
The entry "Current consumption via E-Bus" in the technical data of an EtherCAT Terminal indicates whether
a particular EtherCAT Terminal requires power from the terminal bus (E-bus).
The following diagram shows the permissible installation of a passive EtherCAT Terminal. The passive
EtherCAT Terminal was not directly attached to the power supply unit.
Fig. 25: Passive EtherCAT Terminals, permissible installation.
The following diagram shows the invalid installation of a passive EtherCAT Terminal.
Fig. 26: Passive EtherCAT Terminals, invalid installation.
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