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Installation of EJ modules
4
Installation of EJ modules
4.1
Power supply for the EtherCAT plug-in modules
Power supply
A SELV/PELV power supply must be used to supply power for the EJ coupler and modules. Couplers and
modules have to be connected to SELV/PELV circuits exclusively.
The signal distribution board should have a power supply designed for the maximum possible current load of
the module string. Information on the current required from the E-bus supply can be found for each module
in the respective documentation in section "Technical data", online and in the catalog. The power
requirement of the module string is displayed in the TwinCAT System Manager.
E-bus power supply with EJ1100 or EJ1101-0022 and EJ940x
The EJ1100 Bus Coupler supplies the connected EJ modules with the E-bus system voltage of 3.3 V. The
Coupler can accommodate a load up to 2.2 A. If a higher current is required, a combination of the coupler
EJ1101-0022 and the power supply units EJ9400 (2.5 A) or EJ9404 (12 A) should be used. The EJ940x
power supply units can be used as additional supply modules in the module string.
Depending on the application, the following combinations for the E-bus supply are available:
Fig. 14: E-bus power supply with EJ1100 or EJ1101-0022 + EJ940x
In the EJ1101-0022 coupler, the RJ45 connectors and optional ID switches are external and can be
positioned anywhere on the signal distribution board, as required. This facilitates feeding through a housing.
The EJ940x power supply plug-in modules provide an optional reset function (see chapter Connection of the
documentation for EJ9400 and EJ9404)
28
WARNING
Version: 1.5
EJ18xx
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