Power supply and potential groups

The board is supplied via two galvanically isolated 24 V power supplies:

The power supply Us is used to supply the bus coupler electronics and to generate voltage for the E-Bus (U_EBUS: 3.3 V)
The peripheral voltage Up supplies the electronics on the field side.

SGND (Shield Ground) is a ground signal with shielding function in relation to the rest of the board.

Note

Damage to devices possible

Us, Up and SGND must not be in direct contact with each other!
Don`t connect E-bus GND signal (GND) with 0 V Up and 0 V Us!
The SGND connection to the mounting plate shall be implemented as metal bolts building a direct connection between the signal distribution board and mounting plate (see chapter SGND Connection).

Example with the EJ1100 EtherCAT coupler

Power supply and potential groups 1: — Power supply of the EtherCAT plug-in modules via the EJ1100 EtherCAT coupler

Example with the EJ1101-0022 EtherCAT coupler and power supply module EJ940x

Power supply and potential groups 2: — Power supply of the EtherCAT plug-in modules via the EJ1101-0022 EtherCAT coupler and power supply module EJ940x

Note

Note on routing

Read the notes on routing in chapter Module placement, Design of E-bus power supply and Routing guildelines!
Observe additional notes in chapter pinout of the documentations for the modules used.