Figure 2
PCB of the XMC4300 Relax EtherCAT
®
kits
2.1
Power supply
The XMC4300 Relax EtherCAT
®
Kit must be supplied by an external 5 volt DC power supply connected to any
of the micro USB plugs (X100, X101). Out of the box with the pre-programmed EtherCAT
®
slave application and
the on-board debug probe in operation, the XMC4300 Relax EtherCAT
®
Kit typically draws about 440 mA in an
EtherCAT
®
environment. This current can be delivered via the USB plug of a PC, which is specified to deliver up
to 500 mA. The green Power LED (VDD3.3) indicates the presence of the generated 3.3 V supply voltage.
On-board reverse current protection diodes will ensure safe operation when power is provided through both
USB plugs at the same time. These protection diodes allows to use the on-board debug probe connected with a
PC/Notebook via X101 and a second host PC/Laptop connected with the XMC4300 Relax EtherCAT
®
Kit via X100.
If the board is powered via a USB plug, it is not recommended to apply an additional 5 Volt power supply to one
of the 5 Volt power pins (VDD5, 5 V) on the Arduino headers or mikroBUS
™
socket, because there is no protection
against reverse current into the external power supply. These power pins can be used to power an external
circuit, but care must be taken not to draw more current than USB can deliver. A PC acting as a USB host can
typically deliver up to 500 mA current. If higher currents are required and in order to avoid damage to the USB
restricted - NDA required!
XMC4300 Relax EtherCAT
®
Kit
For XMC4000 family
2 Hardware description
Board User Manual
5
Rev. 1.2
2022-06-20
