Beckhoff EJ6002, Документация

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Installation of EJ modules
EJ6002 23 Version: 1.5
4 Installation of EJ modules
4.1 Power supply for the EtherCAT plug-in modules
WARNING
Power supply from SELV/PELV power supply unit!
SELV/PELV circuits (Safety Extra Low Voltage, Protective Extra Low Voltage) according to
IEC 61010-2-201 must be used to supply this device.
Notes:
• SELV/PELV circuits may give rise to further requirements from standards such as IEC 60204-1 et al, for
example with regard to cable spacing and insulation.
• A SELV (Safety Extra Low Voltage) supply provides safe electrical isolation and limitation of the voltage
without a connection to the protective conductor,
a PELV (Protective Extra Low Voltage) supply also requires a safe connection to the protective conduc-
tor.
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. 12: 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)