Power supply and signal transfer on the signal distribution board

The signal distribution board should have a power supply that is designed for the maximum possible current load of the terminal and module string. Information on the current required from the E-bus supply can be found for each EtherCAT Terminal / EtherCAT plug-in module in the “Technical data“ chapter of the respective documentation, online and in the catalog. The TwinCAT System Manager displays the current consumption of the terminals and modules (see Current consumption via E-bus).

The Embedded PC supplies the attached EtherCAT terminals and the EtherCAT EJ coupler

• with a supply voltage Us of 24 V_DC (-15 %/+20%). This voltage supplies the E-bus and the bus terminal electronics.
  The CXxxxx units supply the E-bus with up to 2,000 mA E-bus current. If a higher current is required due to the attached terminals, power feed terminals or power supply plug-in modules must be used for the E-bus supply.
• with a peripheral voltage Up of 24 V_DC to supply the field electronics.

The EK1110-004x EtherCAT EJ couplers relay the following parameters to the signal distribution board via the rear connector:

• the E-bus signals,
• the E-bus voltage U_EBUS (3.3 V) and
• the peripheral voltage U_P (24 V_DC).

Supply of the signal distribution board via the EK1110-004x EtherCAT EJ coupler

The E-bus voltage U_EBUS is transferred to the signal distribution board via the E-bus contacts of the EtherCAT terminals and the rear connector of the EK1110-004x EtherCAT EJ coupler. The pin assignment can be found in chapter EK1110-004x - Pinout.

The peripheral voltage U_P is transferred to the signal distribution board via the power contacts of the EtherCAT terminals and the rear connector of the EK110-004x EtherCAT EJ coupler.